mirror of
https://github.com/danieleteti/delphimvcframework.git
synced 2024-11-15 15:55:54 +01:00
2000 lines
56 KiB
ObjectPascal
2000 lines
56 KiB
ObjectPascal
// *************************************************************************** }
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2019 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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// ***************************************************************************
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// ***************************************************************************
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unit MVCFramework.ActiveRecord;
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{$I dmvcframework.inc}
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interface
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uses
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System.Generics.Defaults,
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System.Generics.Collections,
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System.RTTI,
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FireDAC.DApt,
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Data.DB,
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FireDAC.Comp.Client,
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FireDAC.Stan.Def,
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FireDAC.Stan.Pool,
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FireDAC.Stan.Async,
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FireDAC.Stan.Param,
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System.SysUtils,
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MVCFramework,
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MVCFramework.Commons,
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MVCFramework.RQL.Parser,
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MVCFramework.Serializer.Intf;
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type
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EMVCActiveRecord = class(EMVCException)
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public
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constructor Create(const AMsg: string); reintroduce; { do not override!! }
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end;
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EMVCActiveRecordNotFound = class(EMVCActiveRecord)
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end;
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TMVCActiveRecordClass = class of TMVCActiveRecord;
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TMVCActiveRecordFieldOption = (foPrimaryKey, foAutoGenerated, foTransient);
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TMVCActiveRecordFieldOptions = set of TMVCActiveRecordFieldOption;
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TMVCEntityAction = (eaCreate, eaRetrieve, eaUpdate, eaDelete);
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TMVCEntityActions = set of TMVCEntityAction;
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TMVCActiveRecordLoadOption = (loIgnoreNotExistentFields);
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TMVCActiveRecordLoadOptions = set of TMVCActiveRecordLoadOption;
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IMVCEntityProcessor = interface
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['{E7CD11E6-9FF9-46D2-B7B0-DA5B38EAA14E}']
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procedure GetEntities(const Context: TWebContext; const Renderer: TMVCRenderer; const entityname: string;
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var Handled: Boolean);
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procedure GetEntity(const Context: TWebContext; const Renderer: TMVCRenderer; const entityname: string;
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const id: Integer; var Handled: Boolean);
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procedure CreateEntity(const Context: TWebContext; const Renderer: TMVCRenderer; const entityname: string;
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var Handled: Boolean);
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procedure UpdateEntity(const Context: TWebContext; const Renderer: TMVCRenderer; const entityname: string;
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const id: Integer; var Handled: Boolean);
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procedure DeleteEntity(const Context: TWebContext; const Renderer: TMVCRenderer; const entityname: string;
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const id: Integer; var Handled: Boolean);
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end;
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MVCActiveRecordCustomAttribute = class(TCustomAttribute)
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end;
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MVCTableAttribute = class(MVCActiveRecordCustomAttribute)
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public
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Name: string;
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constructor Create(aName: string);
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end;
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MVCTableFieldAttribute = class(MVCActiveRecordCustomAttribute)
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public
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FieldName: string;
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FieldOptions: TMVCActiveRecordFieldOptions;
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constructor Create(const aFieldName: string; const aFieldOptions: TMVCActiveRecordFieldOptions); overload;
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constructor Create(aFieldName: string); overload;
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end;
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MVCPrimaryKeyAttribute = MVCTableFieldAttribute deprecated '(ERROR) Use MVCTableFieldAttribute';
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MVCEntityActionsAttribute = class(MVCActiveRecordCustomAttribute)
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private
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EntityAllowedActions: TMVCEntityActions;
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public
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constructor Create(const aEntityAllowedActions: TMVCEntityActions);
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end;
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TMVCActiveRecord = class;
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TMVCSQLGenerator = class;
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TMVCActiveRecordList = class(TObjectList<TMVCActiveRecord>)
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public
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constructor Create; virtual;
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end;
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TMVCActiveRecord = class
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private
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fConn: TFDConnection;
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fSQLGenerator: TMVCSQLGenerator;
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fPrimaryKeyFieldName: string;
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fPrimaryKeyOptions: TMVCActiveRecordFieldOptions;
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fEntityAllowedActions: TMVCEntityActions;
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fRQL2SQL: TRQL2SQL;
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procedure MapColumnToTValue(const aFieldName: string; const aField: TField; const aRTTIField: TRttiField);
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procedure MapTValueToParam(const aValue: TValue; const aParam: TFDParam);
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protected
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fRTTIType: TRttiType;
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fProps: TArray<TRttiField>;
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fObjAttributes: TArray<TCustomAttribute>;
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fPropsAttributes: TArray<TCustomAttribute>;
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fTableName: string;
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fMap: TDictionary<TRttiField, string>;
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fMapNonTransientFields: TDictionary<TRttiField, string>;
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fPrimaryKey: TRttiField;
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fBackendDriver: string;
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fMapping: TMVCFieldsMapping;
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function GetBackEnd: string;
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function SelfConnection: TFDConnection;
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procedure InitTableInfo;
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class function ExecQuery(const SQL: string; const Values: array of Variant): TDataSet; overload;
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class function ExecQuery(const SQL: string; const Values: array of Variant; const Connection: TFDConnection)
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: TDataSet; overload;
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// class function ExecNonQuery(const SQL: string; const Values: array of Variant): int64; overload;
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// class function ExecNonQuery(const SQL: string; const Values: array of Variant; const Connection: TFDConnection): int64; overload;
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function ExecNonQuery(const SQL: string; RefreshAutoGenerated: Boolean = false): int64; overload;
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// load events
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/// <summary>
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/// Called everywhere before persist object into database
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/// </summary>
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procedure OnValidation; virtual;
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/// <summary>
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/// Called just after load the object state from database
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/// </summary>
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procedure OnAfterLoad; virtual;
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/// <summary>
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/// Called before load the object state from database
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/// </summary>
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procedure OnBeforeLoad; virtual;
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/// <summary>
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/// Called before insert the object state to database
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/// </summary>
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procedure OnBeforeInsert; virtual;
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/// <summary>
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/// Called after insert the object state to database
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/// </summary>
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procedure OnAfterInsert; virtual;
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/// <summary>
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/// Called before update the object state to database
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/// </summary>
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procedure OnBeforeUpdate; virtual;
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/// <summary>
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/// Called after update the object state to database
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/// </summary>
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procedure OnAfterUpdate; virtual;
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/// <summary>
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/// Called before delete object from database
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/// </summary>
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procedure OnBeforeDelete; virtual;
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/// <summary>
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/// Called after delete object from database
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/// </summary>
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procedure OnAfterDelete; virtual;
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/// <summary>
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/// Called before insert or update the object to the database
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/// </summary>
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procedure OnBeforeInsertOrUpdate; virtual;
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/// <summary>
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/// Called before execute sql
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/// </summary>
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procedure OnBeforeExecuteSQL(var SQL: String); virtual;
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/// <summary>
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/// Called after insert or update the object to the database
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/// </summary>
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procedure OnAfterInsertOrUpdate; virtual;
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function GenerateSelectSQL: string;
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function SQLGenerator: TMVCSQLGenerator;
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function InternalCount(const RQL: String): int64;
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function InternalSelectRQL(const RQL: string; const MaxRecordCount: Integer): TMVCActiveRecordList;
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public
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constructor Create(aLazyLoadConnection: Boolean); overload;
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{ cannot be virtual! }
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constructor Create; overload; virtual;
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destructor Destroy; override;
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function CheckAction(const aEntityAction: TMVCEntityAction; const aRaiseException: Boolean = True): Boolean;
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procedure Insert;
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function GetMapping: TMVCFieldsMapping;
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function LoadByPK(id: int64): Boolean; virtual;
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procedure Update;
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procedure Delete;
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function TableInfo: string;
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procedure LoadByDataset(const aDataSet: TDataSet; const aOptions: TMVCActiveRecordLoadOptions = []);
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procedure SetPK(const aValue: TValue);
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function GetPK: TValue;
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// class function GetByPK<T: TMVCActiveRecord, constructor>(const aValue: int64): T; overload;
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class function GetByPK(const aClass: TMVCActiveRecordClass; const aValue: int64): TMVCActiveRecord; overload;
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class function GetScalar(const SQL: string; const Params: array of Variant): Variant;
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// class function Select<T: TMVCActiveRecord, constructor>(const SQL: string; const Params: array of Variant;
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// const Options: TMVCActiveRecordLoadOptions = []): TObjectList<T>; overload;
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class function Select(const aClass: TMVCActiveRecordClass; const SQL: string; const Params: array of Variant)
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: TMVCActiveRecordList; overload;
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class function Select(const aClass: TMVCActiveRecordClass; const SQL: string; const Params: array of Variant;
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const Connection: TFDConnection): TMVCActiveRecordList; overload;
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class function SelectRQL(const aClass: TMVCActiveRecordClass; const RQL: string; const MaxRecordCount: Integer)
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: TMVCActiveRecordList; overload;
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class function DeleteRQL(const aClass: TMVCActiveRecordClass; const RQL: string): int64;
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// class function SelectRQL<T: constructor, TMVCActiveRecord>(const RQL: string; const MaxRecordCount: Integer)
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// : TObjectList<T>; overload;
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function SelectRQL(const RQL: string; const MaxRecordCount: Integer): TMVCActiveRecordList; overload;
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// class function Where<T: TMVCActiveRecord, constructor>(const SQLWhere: string; const Params: array of Variant)
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// : TObjectList<T>; overload;
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// class function GetOneByWhere<T: TMVCActiveRecord, constructor>(const SQLWhere: string;
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// const Params: array of Variant; const RaiseExceptionIfNotFound: Boolean = True): T;
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// class function GetFirstByWhere<T: TMVCActiveRecord, constructor>(const SQLWhere: string;
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// const Params: array of Variant; const RaiseExceptionIfNotFound: Boolean = True): T;
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class function Where(const aClass: TMVCActiveRecordClass; const SQLWhere: string; const Params: array of Variant)
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: TMVCActiveRecordList; overload;
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class function Where(const aClass: TMVCActiveRecordClass; const SQLWhere: string; const Params: array of Variant;
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const Connection: TFDConnection): TMVCActiveRecordList; overload;
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// class function All<T: TMVCActiveRecord, constructor>: TObjectList<T>; overload;
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class function All(const aClass: TMVCActiveRecordClass): TObjectList<TMVCActiveRecord>; overload;
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class function DeleteAll(const aClass: TMVCActiveRecordClass): int64; overload;
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function Count(const RQL: String = ''): int64; overload;
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// class function Count<T: TMVCActiveRecord>(const RQL: String = ''): int64; overload;
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// class function Count<T: TMVCActiveRecord>: int64; overload;
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class function Count(const aClass: TMVCActiveRecordClass; const RQL: String = ''): int64; overload;
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class function SelectDataSet(const SQL: string; const Params: array of Variant): TDataSet;
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class function CurrentConnection: TFDConnection;
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end;
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TMVCActiveRecordHelper = class helper for TMVCActiveRecord
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class function GetByPK<T: TMVCActiveRecord, constructor>(const aValue: int64): T; overload;
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class function Select<T: TMVCActiveRecord, constructor>(const SQL: string; const Params: array of Variant;
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const Options: TMVCActiveRecordLoadOptions = []): TObjectList<T>; overload;
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class function SelectRQL<T: constructor, TMVCActiveRecord>(const RQL: string; const MaxRecordCount: Integer)
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: TObjectList<T>; overload;
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class function All<T: TMVCActiveRecord, constructor>: TObjectList<T>; overload;
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class function Count<T: TMVCActiveRecord>(const RQL: String = ''): int64; overload;
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class function Where<T: TMVCActiveRecord, constructor>(const SQLWhere: string; const Params: array of Variant)
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: TObjectList<T>; overload;
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class function GetOneByWhere<T: TMVCActiveRecord, constructor>(const SQLWhere: string;
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const Params: array of Variant; const RaiseExceptionIfNotFound: Boolean = True): T;
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class function GetFirstByWhere<T: TMVCActiveRecord, constructor>(const SQLWhere: string;
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const Params: array of Variant; const RaiseExceptionIfNotFound: Boolean = True): T;
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end;
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IMVCEntitiesRegistry = interface
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['{BB227BEB-A74A-4637-8897-B13BA938C07B}']
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procedure AddEntity(const aURLSegment: string; const aActiveRecordClass: TMVCActiveRecordClass);
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procedure AddEntityProcessor(const aURLSegment: string; const aEntityProcessor: IMVCEntityProcessor);
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function FindEntityClassByURLSegment(const aURLSegment: string;
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out aMVCActiveRecordClass: TMVCActiveRecordClass): Boolean;
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function FindProcessorByURLSegment(const aURLSegment: string; out aMVCEntityProcessor: IMVCEntityProcessor)
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: Boolean;
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end;
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TMVCEntitiesRegistry = class(TInterfacedObject, IMVCEntitiesRegistry)
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private
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fEntitiesDict: TDictionary<string, TMVCActiveRecordClass>;
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fProcessorsDict: TDictionary<string, IMVCEntityProcessor>;
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public
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constructor Create; virtual;
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destructor Destroy; override;
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protected
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procedure AddEntityProcessor(const aURLSegment: string; const aEntityProcessor: IMVCEntityProcessor);
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procedure AddEntity(const aURLSegment: string; const aActiveRecordClass: TMVCActiveRecordClass);
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function FindEntityClassByURLSegment(const aURLSegment: string;
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out aMVCActiveRecordClass: TMVCActiveRecordClass): Boolean;
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function FindProcessorByURLSegment(const aURLSegment: string; out aMVCEntityProcessor: IMVCEntityProcessor)
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: Boolean;
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end;
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IMVCActiveRecordConnections = interface
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['{7B87473C-1784-489F-A838-925E7DDD0DE2}']
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procedure AddConnection(const aName: string; const aConnection: TFDConnection; const Owns: Boolean = false);
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procedure AddDefaultConnection(const aConnection: TFDConnection; const Owns: Boolean = false);
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procedure RemoveConnection(const aName: string);
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procedure RemoveDefaultConnection;
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procedure SetCurrent(const aName: string);
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function GetCurrent: TFDConnection;
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function GetCurrentBackend: string;
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end;
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TMVCConnectionsRepository = class(TInterfacedObject, IMVCActiveRecordConnections)
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private type
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TConnHolder = class
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public
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Connection: TFDConnection;
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OwnsConnection: Boolean;
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destructor Destroy; override;
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end;
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var
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fMREW: TMultiReadExclusiveWriteSynchronizer;
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fConnectionsDict: TDictionary<string, TConnHolder>;
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fCurrentConnectionsByThread: TDictionary<TThreadID, string>;
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function GetKeyName(const aName: string): string;
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public
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constructor Create; virtual;
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destructor Destroy; override;
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procedure AddConnection(const aName: string; const aConnection: TFDConnection; const aOwns: Boolean = false);
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procedure AddDefaultConnection(const aConnection: TFDConnection; const aOwns: Boolean = false);
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procedure RemoveConnection(const aName: string);
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procedure RemoveDefaultConnection;
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procedure SetCurrent(const aName: string);
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function GetCurrent: TFDConnection;
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function GetByName(const aName: string): TFDConnection;
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function GetCurrentBackend: string;
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end;
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TMVCSQLGenerator = class abstract
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private
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fMapping: TMVCFieldsMapping;
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fCompiler: TRQLCompiler;
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fRQL2SQL: TRQL2SQL;
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protected
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function GetRQLParser: TRQL2SQL;
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function GetCompiler: TRQLCompiler;
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function GetCompilerClass: TRQLCompilerClass; virtual; abstract;
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function GetMapping: TMVCFieldsMapping;
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function TableFieldsDelimited(const Map: TDictionary<TRttiField, string>; const PKFieldName: string;
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const Delimiter: string): string;
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public
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constructor Create(Mapping: TMVCFieldsMapping); virtual;
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destructor Destroy; override;
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function CreateSQLWhereByRQL(const RQL: string; const Mapping: TMVCFieldsMapping;
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const UseArtificialLimit: Boolean = True): string; virtual; abstract;
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function CreateSelectSQL(const TableName: string; const Map: TDictionary<TRttiField, string>;
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const PKFieldName: string; const PKOptions: TMVCActiveRecordFieldOptions): string; virtual; abstract;
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function CreateSelectByPKSQL(const TableName: string; const Map: TDictionary<TRttiField, string>;
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const PKFieldName: string; const PKOptions: TMVCActiveRecordFieldOptions; const PrimaryKeyValue: int64): string;
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virtual; abstract;
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function CreateInsertSQL(const TableName: string; const Map: TDictionary<TRttiField, string>;
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const PKFieldName: string; const PKOptions: TMVCActiveRecordFieldOptions): string; virtual; abstract;
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function CreateUpdateSQL(const TableName: string; const Map: TDictionary<TRttiField, string>;
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const PKFieldName: string; const PKOptions: TMVCActiveRecordFieldOptions): string; virtual; abstract;
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function CreateDeleteSQL(const TableName: string; const Map: TDictionary<TRttiField, string>;
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const PKFieldName: string; const PKOptions: TMVCActiveRecordFieldOptions; const PrimaryKeyValue: int64): string;
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virtual; abstract;
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function CreateDeleteAllSQL(const TableName: string): string; virtual; abstract;
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function CreateSelectCount(const TableName: String): String; virtual; abstract;
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end;
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TMVCSQLGeneratorClass = class of TMVCSQLGenerator;
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TMVCSQLGeneratorRegistry = class sealed
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private
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class var cInstance: TMVCSQLGeneratorRegistry;
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class var
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cLock: TObject;
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fSQLGenerators: TDictionary<string, TMVCSQLGeneratorClass>;
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protected
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constructor Create;
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public
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destructor Destroy; override;
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class function Instance: TMVCSQLGeneratorRegistry;
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class destructor Destroy;
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class constructor Create;
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procedure RegisterSQLGenerator(const aBackend: string; const aRQLBackendClass: TMVCSQLGeneratorClass);
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procedure UnRegisterSQLGenerator(const aBackend: string);
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function GetSQLGenerator(const aBackend: string): TMVCSQLGeneratorClass;
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end;
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function ActiveRecordConnectionsRegistry: IMVCActiveRecordConnections;
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function ActiveRecordMappingRegistry: IMVCEntitiesRegistry;
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function GetBackEndByConnection(aConnection: TFDConnection): string;
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implementation
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uses
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System.TypInfo,
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System.IOUtils,
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System.Classes,
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MVCFramework.DataSet.Utils,
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MVCFramework.Logger,
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FireDAC.Stan.Option,
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Data.FmtBcd;
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var
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gCtx: TRttiContext;
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gEntitiesRegistry: IMVCEntitiesRegistry;
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gConnections: IMVCActiveRecordConnections;
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gLock: TObject;
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function GetBackEndByConnection(aConnection: TFDConnection): string;
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begin
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case Ord(aConnection.RDBMSKind) of
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0:
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Exit('unknown');
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1:
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Exit('oracle');
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2:
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Exit('mssql');
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3:
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Exit('msaccess');
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4:
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Exit('mysql');
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5:
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Exit('db2');
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6:
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Exit('sqlanywhere');
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7:
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Exit('advantage');
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8:
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Exit('interbase');
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9:
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Exit('firebird');
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10:
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Exit('sqlite');
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11:
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Exit('postgresql');
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12:
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Exit('nexusdb');
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13:
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Exit('dataSnap');
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14:
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Exit('informix');
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15:
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Exit('teradata');
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16:
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Exit('mongodb');
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17:
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Exit('other');
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else
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|
raise EMVCActiveRecord.Create('Unknown RDBMS Kind');
|
|
end;
|
|
end;
|
|
|
|
function ActiveRecordConnectionsRegistry: IMVCActiveRecordConnections;
|
|
begin
|
|
if gConnections = nil then // double check here
|
|
begin
|
|
TMonitor.Enter(gLock);
|
|
try
|
|
if gConnections = nil then
|
|
begin
|
|
gConnections := TMVCConnectionsRepository.Create;
|
|
end;
|
|
finally
|
|
TMonitor.Exit(gLock);
|
|
end;
|
|
end;
|
|
Result := gConnections;
|
|
end;
|
|
|
|
{ TConnectionsRepository }
|
|
|
|
procedure TMVCConnectionsRepository.AddConnection(const aName: string; const aConnection: TFDConnection;
|
|
const aOwns: Boolean = false);
|
|
var
|
|
lName: string;
|
|
lConnKeyName: string;
|
|
lConnHolder: TConnHolder;
|
|
begin
|
|
lName := aName.ToLower;
|
|
lConnKeyName := GetKeyName(lName);
|
|
|
|
fMREW.BeginWrite;
|
|
try
|
|
lConnHolder := TConnHolder.Create;
|
|
lConnHolder.Connection := aConnection;
|
|
lConnHolder.OwnsConnection := aOwns;
|
|
fConnectionsDict.Add(lConnKeyName, lConnHolder);
|
|
// raise exception on duplicates
|
|
if (lName = 'default') and (not fCurrentConnectionsByThread.ContainsKey(TThread.CurrentThread.ThreadID)) then
|
|
begin
|
|
fCurrentConnectionsByThread.AddOrSetValue(TThread.CurrentThread.ThreadID, lName);
|
|
end;
|
|
finally
|
|
fMREW.EndWrite;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCConnectionsRepository.AddDefaultConnection(
|
|
const aConnection: TFDConnection; const aOwns: Boolean);
|
|
begin
|
|
AddConnection('default', aConnection, aOwns);
|
|
end;
|
|
|
|
constructor TMVCConnectionsRepository.Create;
|
|
begin
|
|
inherited;
|
|
fMREW := TMultiReadExclusiveWriteSynchronizer.Create;
|
|
fConnectionsDict := TDictionary<string, TConnHolder>.Create;
|
|
fCurrentConnectionsByThread := TDictionary<TThreadID, string>.Create;
|
|
end;
|
|
|
|
destructor TMVCConnectionsRepository.Destroy;
|
|
begin
|
|
fConnectionsDict.Free;
|
|
fCurrentConnectionsByThread.Free;
|
|
fMREW.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TMVCConnectionsRepository.GetByName(const aName: string): TFDConnection;
|
|
var
|
|
lKeyName: string;
|
|
lConnHolder: TConnHolder;
|
|
begin
|
|
{$IF not Defined(SeattleOrBetter)}
|
|
Result := nil;
|
|
{$ENDIF}
|
|
lKeyName := GetKeyName(aName.ToLower);
|
|
fMREW.BeginRead;
|
|
try
|
|
if not fConnectionsDict.TryGetValue(lKeyName, lConnHolder) then
|
|
raise Exception.CreateFmt('Unknown connection %s', [aName]);
|
|
Result := lConnHolder.Connection;
|
|
finally
|
|
fMREW.EndRead;
|
|
end;
|
|
end;
|
|
|
|
function TMVCConnectionsRepository.GetCurrent: TFDConnection;
|
|
var
|
|
lName: string;
|
|
begin
|
|
{$IF not Defined(SeattleOrBetter)}
|
|
Result := nil;
|
|
{$ENDIF}
|
|
fMREW.BeginRead;
|
|
try
|
|
if fCurrentConnectionsByThread.TryGetValue(TThread.CurrentThread.ThreadID, lName) then
|
|
begin
|
|
Result := GetByName(lName);
|
|
end
|
|
else
|
|
begin
|
|
raise EMVCActiveRecord.Create('No current connection for thread');
|
|
end;
|
|
finally
|
|
fMREW.EndRead;
|
|
end;
|
|
end;
|
|
|
|
function TMVCConnectionsRepository.GetCurrentBackend: string;
|
|
begin
|
|
Result := GetBackEndByConnection(GetCurrent);
|
|
end;
|
|
|
|
function TMVCConnectionsRepository.GetKeyName(const aName: string): string;
|
|
begin
|
|
Result := Format('%10.10d::%s', [TThread.CurrentThread.ThreadID, aName]);
|
|
end;
|
|
|
|
procedure TMVCConnectionsRepository.RemoveConnection(const aName: string);
|
|
var
|
|
lName: string;
|
|
lKeyName: string;
|
|
lConnHolder: TConnHolder;
|
|
begin
|
|
lName := aName.ToLower;
|
|
lKeyName := GetKeyName(lName);
|
|
|
|
fMREW.BeginWrite;
|
|
try
|
|
if not fConnectionsDict.TryGetValue(lKeyName, lConnHolder) then
|
|
raise Exception.CreateFmt('Unknown connection %s', [aName]);
|
|
fConnectionsDict.Remove(lKeyName);
|
|
try
|
|
FreeAndNil(lConnHolder);
|
|
except
|
|
on E: Exception do
|
|
begin
|
|
LogE('ActiveRecord: ' + E.ClassName + ' > ' + E.Message);
|
|
raise;
|
|
end;
|
|
end;
|
|
finally
|
|
fMREW.EndWrite;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCConnectionsRepository.RemoveDefaultConnection;
|
|
begin
|
|
RemoveConnection('default');
|
|
end;
|
|
|
|
procedure TMVCConnectionsRepository.SetCurrent(const aName: string);
|
|
var
|
|
lName: string;
|
|
lKeyName: string;
|
|
begin
|
|
lName := aName.ToLower;
|
|
lKeyName := GetKeyName(lName);
|
|
|
|
fMREW.BeginWrite;
|
|
try
|
|
if not fConnectionsDict.ContainsKey(lKeyName) then
|
|
raise Exception.CreateFmt('Unknown connection %s', [aName]);
|
|
fCurrentConnectionsByThread.AddOrSetValue(TThread.CurrentThread.ThreadID, lName);
|
|
finally
|
|
fMREW.EndWrite;
|
|
end;
|
|
end;
|
|
|
|
function ActiveRecordMappingRegistry: IMVCEntitiesRegistry;
|
|
begin
|
|
if gEntitiesRegistry = nil then
|
|
begin
|
|
TMonitor.Enter(gLock);
|
|
try
|
|
if gEntitiesRegistry = nil then
|
|
begin
|
|
gEntitiesRegistry := TMVCEntitiesRegistry.Create;
|
|
end;
|
|
finally
|
|
TMonitor.Exit(gLock);
|
|
end;
|
|
end;
|
|
Result := gEntitiesRegistry;
|
|
end;
|
|
|
|
{ TableFieldAttribute }
|
|
|
|
constructor MVCTableFieldAttribute.Create(aFieldName: string);
|
|
begin
|
|
Create(aFieldName, []);
|
|
end;
|
|
|
|
{ TableAttribute }
|
|
|
|
constructor MVCTableAttribute.Create(aName: string);
|
|
begin
|
|
inherited Create;
|
|
name := aName;
|
|
end;
|
|
|
|
{ TActiveRecord }
|
|
|
|
destructor TMVCActiveRecord.Destroy;
|
|
begin
|
|
fMap.Free;
|
|
fMapNonTransientFields.Free;
|
|
fSQLGenerator.Free;
|
|
fRQL2SQL.Free;
|
|
fConn := nil; // do not free it!!
|
|
inherited;
|
|
end;
|
|
|
|
function TMVCActiveRecord.ExecNonQuery(const SQL: string; RefreshAutoGenerated: Boolean = false): int64;
|
|
var
|
|
lQry: TFDQuery;
|
|
lPar: TFDParam;
|
|
lPair: TPair<TRttiField, string>;
|
|
lValue: TValue;
|
|
lSQL: String;
|
|
begin
|
|
lQry := TFDQuery.Create(nil);
|
|
try
|
|
lQry.Connection := fConn;
|
|
lSQL := SQL;
|
|
OnBeforeExecuteSQL(lSQL);
|
|
lQry.SQL.Text := lSQL;
|
|
// lQry.Prepare;
|
|
for lPair in fMap do
|
|
begin
|
|
lPar := lQry.FindParam(lPair.value);
|
|
if lPar <> nil then
|
|
begin
|
|
lValue := lPair.Key.GetValue(Self);
|
|
MapTValueToParam(lValue, lPar);
|
|
end
|
|
end;
|
|
|
|
// check if it's the primary key
|
|
lPar := lQry.FindParam(fPrimaryKeyFieldName);
|
|
if lPar <> nil then
|
|
begin
|
|
if lPar.DataType = ftUnknown then
|
|
begin
|
|
{ TODO -oDanieleT -cGeneral : Let's find a smarter way to do this if the engine cannot recognize parameter's datatype }
|
|
lPar.DataType := ftLargeint;
|
|
end;
|
|
MapTValueToParam(fPrimaryKey.GetValue(Self), lPar);
|
|
end;
|
|
|
|
if RefreshAutoGenerated and (TMVCActiveRecordFieldOption.foAutoGenerated in fPrimaryKeyOptions) then
|
|
begin
|
|
lQry.Open;
|
|
fPrimaryKey.SetValue(Self, lQry.FieldByName(fPrimaryKeyFieldName).AsInteger);
|
|
OnAfterLoad;
|
|
end
|
|
else
|
|
begin
|
|
lQry.ExecSQL(lSQL);
|
|
end;
|
|
|
|
Result := lQry.RowsAffected;
|
|
finally
|
|
lQry.Free;
|
|
end;
|
|
end;
|
|
|
|
// class function TMVCActiveRecord.ExecNonQuery(const SQL: string;
|
|
// const Values: array of Variant; const Connection: TFDConnection): int64;
|
|
// var
|
|
// lQry: TFDQuery;
|
|
// begin
|
|
// lQry := TFDQuery.Create(nil);
|
|
// try
|
|
// lQry.FetchOptions.Unidirectional := True;
|
|
// if Connection = nil then
|
|
// begin
|
|
// lQry.Connection := ActiveRecordConnectionsRegistry.GetCurrent;
|
|
// end
|
|
// else
|
|
// begin
|
|
// lQry.Connection := Connection;
|
|
// end;
|
|
// lQry.SQL.Text := SQL;
|
|
// lQry.Prepare;
|
|
// lQry.ExecSQL(SQL, Values);
|
|
// Result := lQry.RowsAffected;
|
|
// except
|
|
// lQry.Free;
|
|
// raise;
|
|
// end;
|
|
// end;
|
|
//
|
|
// class function TMVCActiveRecord.ExecNonQuery(const SQL: string;
|
|
// const Values: array of Variant): int64;
|
|
// begin
|
|
// Result := ExecNonQuery(SQL, Values, nil);
|
|
// end;
|
|
|
|
class function TMVCActiveRecord.ExecQuery(const SQL: string; const Values: array of Variant;
|
|
const Connection: TFDConnection): TDataSet;
|
|
var
|
|
lQry: TFDQuery;
|
|
begin
|
|
lQry := TFDQuery.Create(nil);
|
|
try
|
|
lQry.FetchOptions.Unidirectional := false; // True;
|
|
if Connection = nil then
|
|
begin
|
|
lQry.Connection := ActiveRecordConnectionsRegistry.GetCurrent;
|
|
end
|
|
else
|
|
begin
|
|
lQry.Connection := Connection;
|
|
end;
|
|
lQry.SQL.Text := SQL;
|
|
// lQry.Prepare;
|
|
lQry.Open(SQL, Values);
|
|
Result := lQry;
|
|
except
|
|
lQry.Free;
|
|
raise;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.ExecQuery(const SQL: string; const Values: array of Variant): TDataSet;
|
|
begin
|
|
Result := ExecQuery(SQL, Values, nil);
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.InitTableInfo;
|
|
var
|
|
lAttribute: TCustomAttribute;
|
|
lRTTIField: TRttiField;
|
|
begin
|
|
fEntityAllowedActions := [TMVCEntityAction.eaCreate, TMVCEntityAction.eaRetrieve, TMVCEntityAction.eaUpdate,
|
|
TMVCEntityAction.eaDelete];
|
|
fTableName := '';
|
|
fRTTIType := gCtx.GetType(Self.ClassInfo);
|
|
fObjAttributes := fRTTIType.GetAttributes;
|
|
for lAttribute in fObjAttributes do
|
|
begin
|
|
if lAttribute is MVCTableAttribute then
|
|
begin
|
|
fTableName := MVCTableAttribute(lAttribute).Name;
|
|
continue;
|
|
end;
|
|
if lAttribute is MVCEntityActionsAttribute then
|
|
begin
|
|
fEntityAllowedActions := MVCEntityActionsAttribute(lAttribute).EntityAllowedActions;
|
|
Break;
|
|
end;
|
|
end;
|
|
|
|
if fTableName = '' then
|
|
raise Exception.Create('Cannot find TableNameAttribute');
|
|
|
|
fProps := fRTTIType.GetFields;
|
|
for lRTTIField in fProps do
|
|
begin
|
|
fPropsAttributes := lRTTIField.GetAttributes;
|
|
if Length(fPropsAttributes) = 0 then
|
|
continue;
|
|
for lAttribute in fPropsAttributes do
|
|
begin
|
|
if lAttribute is MVCTableFieldAttribute then
|
|
begin
|
|
if foPrimaryKey in MVCTableFieldAttribute(lAttribute).FieldOptions then
|
|
begin
|
|
fPrimaryKey := lRTTIField;
|
|
fPrimaryKeyFieldName := MVCTableFieldAttribute(lAttribute).FieldName;
|
|
fPrimaryKeyOptions := MVCTableFieldAttribute(lAttribute).FieldOptions;
|
|
continue;
|
|
end;
|
|
|
|
fMap.Add(lRTTIField, { fTableName + '.' + } MVCTableFieldAttribute(lAttribute).FieldName);
|
|
if not(foTransient in MVCTableFieldAttribute(lAttribute).FieldOptions) then
|
|
fMapNonTransientFields.Add(lRTTIField, MVCTableFieldAttribute(lAttribute).FieldName);
|
|
end;
|
|
// else if lAttribute is MVCPrimaryKeyAttribute then
|
|
// begin
|
|
// fPrimaryKey := lRTTIField;
|
|
// fPrimaryKeyFieldName := MVCPrimaryKeyAttribute(lAttribute).FieldName;
|
|
// fPrimaryKeyOptions := MVCPrimaryKeyAttribute(lAttribute).FieldOptions;
|
|
// end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.Insert;
|
|
var
|
|
SQL: string;
|
|
begin
|
|
CheckAction(TMVCEntityAction.eaCreate);
|
|
OnValidation;
|
|
OnBeforeInsert;
|
|
OnBeforeInsertOrUpdate;
|
|
if fMapNonTransientFields.Count = 0 then
|
|
begin
|
|
raise EMVCActiveRecord.CreateFmt
|
|
('Cannot insert an entity if all fields are transient. Class [%s] mapped on table [%s]', [ClassName, fTableName]);
|
|
end;
|
|
SQL := SQLGenerator.CreateInsertSQL(fTableName, fMapNonTransientFields, fPrimaryKeyFieldName, fPrimaryKeyOptions);
|
|
ExecNonQuery(SQL, True);
|
|
OnAfterInsert;
|
|
OnAfterInsertOrUpdate;
|
|
end;
|
|
|
|
function TMVCActiveRecord.InternalCount(const RQL: String): int64;
|
|
var
|
|
lSQL: string;
|
|
begin
|
|
lSQL := Self.SQLGenerator.CreateSelectCount(fTableName);
|
|
if not RQL.IsEmpty then
|
|
begin
|
|
lSQL := lSQL + fSQLGenerator.CreateSQLWhereByRQL(RQL, GetMapping, false);
|
|
end;
|
|
Result := GetScalar(lSQL, []);
|
|
end;
|
|
|
|
function TMVCActiveRecord.InternalSelectRQL(const RQL: string;
|
|
const MaxRecordCount: Integer): TMVCActiveRecordList;
|
|
var
|
|
lSQL: string;
|
|
begin
|
|
lSQL := SQLGenerator.CreateSQLWhereByRQL(RQL, GetMapping);
|
|
LogD(Format('RQL [%s] => SQL [%s]', [RQL, lSQL]));
|
|
Result := Where(TMVCActiveRecordClass(Self.ClassType), lSQL, []);
|
|
end;
|
|
|
|
constructor TMVCActiveRecord.Create(aLazyLoadConnection: Boolean);
|
|
begin
|
|
inherited Create;
|
|
fConn := nil;
|
|
SetLength(fMapping, 0);
|
|
{ TODO -oDanieleT -cGeneral : Consider lazyconnection }
|
|
// if not aLazyLoadConnection then
|
|
// begin
|
|
SelfConnection;
|
|
// end;
|
|
fMap := TDictionary<TRttiField, string>.Create;
|
|
fMapNonTransientFields := TDictionary<TRttiField, string>.Create;
|
|
InitTableInfo;
|
|
end;
|
|
|
|
function TMVCActiveRecord.GenerateSelectSQL: string;
|
|
begin
|
|
Result := SQLGenerator.CreateSelectSQL(fTableName, fMap, fPrimaryKeyFieldName, fPrimaryKeyOptions);
|
|
end;
|
|
|
|
function TMVCActiveRecord.GetBackEnd: string;
|
|
begin
|
|
if fBackendDriver.IsEmpty then
|
|
begin
|
|
fBackendDriver := GetBackEndByConnection(fConn);
|
|
end;
|
|
Result := fBackendDriver;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.GetByPK(const aClass: TMVCActiveRecordClass; const aValue: int64): TMVCActiveRecord;
|
|
begin
|
|
Result := aClass.Create;
|
|
if not Result.LoadByPK(aValue) then
|
|
begin
|
|
Result.Free;
|
|
raise EMVCActiveRecordNotFound.Create('Record not found');
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.GetByPK<T>(const aValue: int64): T;
|
|
var
|
|
lActiveRecord: TMVCActiveRecord;
|
|
begin
|
|
Result := T.Create;
|
|
lActiveRecord := TMVCActiveRecord(Result);
|
|
if not lActiveRecord.LoadByPK(aValue) then
|
|
begin
|
|
Result.Free;
|
|
raise EMVCActiveRecordNotFound.Create('Record not found');
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.GetFirstByWhere<T>(const SQLWhere: string; const Params: array of Variant;
|
|
const RaiseExceptionIfNotFound: Boolean): T;
|
|
var
|
|
lList: TObjectList<T>;
|
|
begin
|
|
lList := Where<T>(SQLWhere, Params);
|
|
try
|
|
if lList.Count = 0 then
|
|
begin
|
|
if RaiseExceptionIfNotFound then
|
|
raise EMVCActiveRecord.Create('Got 0 rows');
|
|
Exit(nil);
|
|
end;
|
|
lList.OwnsObjects := false;
|
|
Result := lList.First;
|
|
finally
|
|
lList.Free;
|
|
end;
|
|
end;
|
|
|
|
function TMVCActiveRecord.GetMapping: TMVCFieldsMapping;
|
|
var
|
|
lPair: TPair<TRttiField, string>;
|
|
i: Integer;
|
|
begin
|
|
if Length(fMapping) = 0 then
|
|
begin
|
|
if not fPrimaryKeyFieldName.IsEmpty then
|
|
begin
|
|
SetLength(fMapping, fMap.Count + 1);
|
|
fMapping[0].InstanceFieldName := fPrimaryKey.Name.Substring(1).ToLower;
|
|
fMapping[0].DatabaseFieldName := fPrimaryKeyFieldName;
|
|
i := 1;
|
|
end
|
|
else
|
|
begin
|
|
SetLength(fMapping, fMap.Count);
|
|
i := 0;
|
|
end;
|
|
|
|
for lPair in fMap do
|
|
begin
|
|
fMapping[i].InstanceFieldName := lPair.Key.Name.Substring(1).ToLower;
|
|
fMapping[i].DatabaseFieldName := lPair.value;
|
|
inc(i);
|
|
end;
|
|
end;
|
|
Result := fMapping;
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.GetOneByWhere<T>(const SQLWhere: string; const Params: array of Variant;
|
|
const RaiseExceptionIfNotFound: Boolean): T;
|
|
begin
|
|
Result := GetFirstByWhere<T>(SQLWhere, Params, false);
|
|
if Result = nil then
|
|
begin
|
|
if RaiseExceptionIfNotFound then
|
|
raise EMVCActiveRecord.Create('Got 0 rows when exactly 1 was expected');
|
|
end;
|
|
end;
|
|
|
|
function TMVCActiveRecord.GetPK: TValue;
|
|
begin
|
|
if fPrimaryKeyFieldName.IsEmpty then
|
|
raise Exception.Create('No primary key defined');
|
|
Result := fPrimaryKey.GetValue(Self);
|
|
end;
|
|
|
|
class function TMVCActiveRecord.GetScalar(const SQL: string; const Params: array of Variant): Variant;
|
|
begin
|
|
Result := CurrentConnection.ExecSQLScalar(SQL, Params);
|
|
end;
|
|
|
|
function TMVCActiveRecord.CheckAction(const aEntityAction: TMVCEntityAction; const aRaiseException: Boolean): Boolean;
|
|
begin
|
|
Result := aEntityAction in fEntityAllowedActions;
|
|
if (not Result) and aRaiseException then
|
|
raise EMVCActiveRecord.CreateFmt('Action not allowed on "%s"', [ClassName]);
|
|
end;
|
|
|
|
class function TMVCActiveRecord.Count(const aClass: TMVCActiveRecordClass; const RQL: String): int64;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create;
|
|
try
|
|
//Up to 10.1 BErlin, here the compiler try to call the Count<T> introduced by the class helper
|
|
//Instead of the Count() which exists in "TMVCActiveRecord"
|
|
Result := lAR.InternalCount(RQL);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
function TMVCActiveRecord.Count(const RQL: String = ''): Int64;
|
|
begin
|
|
Result := InternalCount(RQL);
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.Count<T>(const RQL: String = ''): int64;
|
|
begin
|
|
Result := TMVCActiveRecord.Count(TMVCActiveRecordClass(T), RQL);
|
|
end;
|
|
|
|
class function TMVCActiveRecord.CurrentConnection: TFDConnection;
|
|
begin
|
|
Result := ActiveRecordConnectionsRegistry.GetCurrent;
|
|
end;
|
|
|
|
function TMVCActiveRecord.SelfConnection: TFDConnection;
|
|
begin
|
|
if fConn = nil then
|
|
begin
|
|
fConn := ActiveRecordConnectionsRegistry.GetCurrent;
|
|
end;
|
|
Result := fConn;
|
|
end;
|
|
|
|
constructor TMVCActiveRecord.Create;
|
|
begin
|
|
Create(false);
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.Delete;
|
|
var
|
|
SQL: string;
|
|
begin
|
|
OnBeforeDelete;
|
|
if not Assigned(fPrimaryKey) then
|
|
raise Exception.CreateFmt('Cannot delete %s without a primary key', [ClassName]);
|
|
SQL := SQLGenerator.CreateDeleteSQL(fTableName, fMap, fPrimaryKeyFieldName, fPrimaryKeyOptions,
|
|
fPrimaryKey.GetValue(Self).AsInt64);
|
|
ExecNonQuery(SQL, false);
|
|
OnAfterDelete;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.DeleteAll(const aClass: TMVCActiveRecordClass): int64;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create;
|
|
try
|
|
Result := lAR.ExecNonQuery(lAR.SQLGenerator.CreateDeleteAllSQL(lAR.fTableName));
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.DeleteRQL(const aClass: TMVCActiveRecordClass; const RQL: string): int64;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create(True);
|
|
try
|
|
Result := lAR.ExecNonQuery(lAR.SQLGenerator.CreateDeleteAllSQL(lAR.fTableName) +
|
|
lAR.SQLGenerator.CreateSQLWhereByRQL(RQL, lAR.GetMapping, false));
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.MapColumnToTValue(const aFieldName: string; const aField: TField;
|
|
const aRTTIField: TRttiField);
|
|
var
|
|
lInternalStream: TStream;
|
|
lSStream: TStringStream;
|
|
begin
|
|
case aField.DataType of
|
|
ftString, ftWideString:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsString);
|
|
end;
|
|
ftLargeint, ftAutoInc:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsLargeInt);
|
|
end;
|
|
ftInteger, ftSmallint, ftShortint:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsInteger);
|
|
end;
|
|
ftLongWord, ftWord:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsLongWord);
|
|
end;
|
|
ftFMTBcd:
|
|
begin
|
|
aRTTIField.SetValue(Self, BCDtoCurrency(aField.AsBCD));
|
|
end;
|
|
ftDate:
|
|
begin
|
|
aRTTIField.SetValue(Self, Trunc(aField.AsDateTime));
|
|
end;
|
|
ftDateTime:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsDateTime);
|
|
end;
|
|
ftTimeStamp:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsDateTime);
|
|
end;
|
|
ftBoolean:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsBoolean);
|
|
end;
|
|
ftMemo, ftWideMemo:
|
|
begin
|
|
if aRTTIField.FieldType.TypeKind in [tkString, tkUString {, tkWideString}] then
|
|
begin
|
|
// In case you want to map a "TEXT" blob into a Delphi String
|
|
lSStream := TStringStream.Create('', TEncoding.Unicode);
|
|
try
|
|
TBlobField(aField).SaveToStream(lSStream);
|
|
aRTTIField.SetValue(Self, lSStream.DataString);
|
|
finally
|
|
lSStream.Free;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
// In case you want to map a bynary blob into a Delphi Stream
|
|
lInternalStream := aRTTIField.GetValue(Self).AsObject as TStream;
|
|
if lInternalStream = nil then
|
|
begin
|
|
raise EMVCActiveRecord.CreateFmt('Property target for %s field is nil', [aFieldName]);
|
|
end;
|
|
lInternalStream.Position := 0;
|
|
TBlobField(aField).SaveToStream(lInternalStream);
|
|
lInternalStream.Position := 0;
|
|
end;
|
|
end;
|
|
ftBCD:
|
|
begin
|
|
aRTTIField.SetValue(Self, BCDtoCurrency(aField.AsBCD));
|
|
end;
|
|
ftFloat:
|
|
begin
|
|
aRTTIField.SetValue(Self, aField.AsFloat);
|
|
end;
|
|
ftBlob:
|
|
begin
|
|
lInternalStream := aRTTIField.GetValue(Self).AsObject as TStream;
|
|
if lInternalStream = nil then
|
|
begin
|
|
raise EMVCActiveRecord.CreateFmt('Property target for %s field is nil', [aFieldName]);
|
|
end;
|
|
lInternalStream.Position := 0;
|
|
TBlobField(aField).SaveToStream(lInternalStream);
|
|
lInternalStream.Position := 0;
|
|
end;
|
|
{$IF Defined(SeattleOrBetter)}
|
|
ftGuid:
|
|
begin
|
|
aRTTIField.SetValue(Self, TValue.From<TGUID>(aField.AsGuid));
|
|
end;
|
|
{$ENDIF}
|
|
else
|
|
raise EMVCActiveRecord.CreateFmt('Unsupported FieldType (%d) for field %s', [Ord(aField.DataType), aFieldName]);
|
|
end;
|
|
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.MapTValueToParam(const aValue: TValue; const aParam: TFDParam);
|
|
var
|
|
lStream: TStream;
|
|
lName: String;
|
|
begin
|
|
{$IFDEF NEXTGEN}
|
|
lName := aValue.TypeInfo.NameFld.ToString;
|
|
{$ELSE}
|
|
lName := String(aValue.TypeInfo.Name);
|
|
{$ENDIF}
|
|
case aValue.TypeInfo.Kind of
|
|
// tkUnknown:
|
|
// begin
|
|
// { aParam.DataType could be pkUndefined for some RDBMS (es. MySQL), so we rely on Variant }
|
|
// if (aValue.TypeInfo.Kind = tkClass) then
|
|
// begin
|
|
// if not aValue.IsInstanceOf(TStream) then
|
|
// raise EMVCActiveRecord.CreateFmt('Unsupported type for param %s', [aParam.Name]);
|
|
// lStream := aValue.AsType<TStream>(false);
|
|
// if Assigned(lStream) then
|
|
// begin
|
|
// lStream.Position := 0;
|
|
// aParam.LoadFromStream(lStream, ftBlob);
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.Clear;
|
|
// end;
|
|
//
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.value := aValue.AsVariant;
|
|
// end;
|
|
// end;
|
|
tkString, tkUString:
|
|
begin
|
|
aParam.AsString := aValue.AsString;
|
|
end;
|
|
{$IF Defined(SeattleOrBetter)}
|
|
tkWideString:
|
|
begin
|
|
aParam.AsWideString := aValue.AsString;
|
|
end;
|
|
{$ENDIF}
|
|
tkInt64:
|
|
begin
|
|
aParam.AsLargeInt := aValue.AsInt64;
|
|
end;
|
|
tkInteger:
|
|
begin
|
|
aParam.AsInteger := aValue.AsInteger;
|
|
end;
|
|
tkEnumeration:
|
|
begin
|
|
if aValue.TypeInfo = TypeInfo(System.Boolean) then
|
|
begin
|
|
aParam.AsBoolean := aValue.AsBoolean;
|
|
end
|
|
else
|
|
begin
|
|
aParam.AsInteger := Ord(aValue.AsInteger);
|
|
end;
|
|
end;
|
|
tkFloat:
|
|
begin
|
|
if lName = 'TDate' then
|
|
begin
|
|
aParam.AsDate := Trunc(aValue.AsExtended);
|
|
end
|
|
else
|
|
if lName = 'TDateTime' then
|
|
begin
|
|
aParam.AsDateTime := aValue.AsExtended;
|
|
end
|
|
else
|
|
if lName = 'Currency' then
|
|
begin
|
|
aParam.AsCurrency := aValue.AsCurrency;
|
|
end
|
|
else
|
|
begin
|
|
aParam.AsFloat := aValue.AsExtended;
|
|
end;
|
|
end;
|
|
tkClass:
|
|
begin
|
|
if not aValue.IsInstanceOf(TStream) then
|
|
raise EMVCActiveRecord.CreateFmt('Unsupported reference type for param %s: %s',
|
|
[aParam.Name, aValue.AsObject.ClassName]);
|
|
{$IF Defined(SeattleOrBetter)}
|
|
lStream := aValue.AsType<TStream>(false);
|
|
{$ELSE}
|
|
lStream := aValue.AsType<TStream>();
|
|
{$ENDIF}
|
|
if Assigned(lStream) then
|
|
begin
|
|
lStream.Position := 0;
|
|
aParam.LoadFromStream(lStream, ftBlob);
|
|
end
|
|
else
|
|
begin
|
|
aParam.Clear;
|
|
end;
|
|
end;
|
|
tkRecord:
|
|
begin
|
|
if aValue.IsType(TypeInfo(TGUID)) then
|
|
begin
|
|
aParam.AsGuid := aValue.AsType<TGUID>;
|
|
end
|
|
else
|
|
begin
|
|
raise Exception.CreateFmt('Unsupported Record TypeKind (%d) for param %s',
|
|
[Ord(aValue.TypeInfo.Kind), aParam.Name]);
|
|
end;
|
|
end;
|
|
// ftBoolean:
|
|
// begin
|
|
// aParam.AsBoolean := aValue.AsBoolean;
|
|
// end;
|
|
// ftMemo:
|
|
// begin
|
|
// aParam.AsMemo := AnsiString(aValue.AsString);
|
|
// end;
|
|
// ftWideMemo:
|
|
// begin
|
|
// aParam.AsWideMemo := aValue.AsString;
|
|
// end;
|
|
// ftBCD:
|
|
// begin
|
|
// aParam.AsBCD := aValue.AsCurrency;
|
|
// end;
|
|
// ftBlob:
|
|
// begin
|
|
// lStream := aValue.AsType<TStream>(false);
|
|
// if Assigned(lStream) then
|
|
// begin
|
|
// lStream.Position := 0;
|
|
// aParam.LoadFromStream(lStream, ftBlob);
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.Clear;
|
|
// end;
|
|
// end;
|
|
else
|
|
raise Exception.CreateFmt('Unsupported TypeKind (%d) for param %s', [Ord(aValue.TypeInfo.Kind), aParam.Name]);
|
|
end;
|
|
|
|
// case aParam.DataType of
|
|
// ftUnknown:
|
|
// begin
|
|
// { aParam.DataType could be pkUndefined for some RDBMS (es. MySQL), so we rely on Variant }
|
|
// if (aValue.TypeInfo.Kind = tkClass) then
|
|
// begin
|
|
// if not aValue.IsInstanceOf(TStream) then
|
|
// raise EMVCActiveRecord.CreateFmt('Unsupported type for param %s', [aParam.Name]);
|
|
// lStream := aValue.AsType<TStream>(false);
|
|
// if Assigned(lStream) then
|
|
// begin
|
|
// lStream.Position := 0;
|
|
// aParam.LoadFromStream(lStream, ftBlob);
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.Clear;
|
|
// end;
|
|
//
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.value := aValue.AsVariant;
|
|
// end;
|
|
// end;
|
|
// ftString:
|
|
// begin
|
|
// aParam.AsString := aValue.AsString;
|
|
// end;
|
|
// ftWideString:
|
|
// begin
|
|
// aParam.AsWideString := aValue.AsString;
|
|
// end;
|
|
// ftLargeint:
|
|
// begin
|
|
// aParam.AsLargeInt := aValue.AsInt64;
|
|
// end;
|
|
// ftSmallint:
|
|
// begin
|
|
// aParam.AsSmallInt := aValue.AsInteger;
|
|
// end;
|
|
// ftInteger:
|
|
// begin
|
|
// aParam.AsInteger := aValue.AsInteger;
|
|
// end;
|
|
// ftLongWord:
|
|
// begin
|
|
// aParam.AsLongWord := aValue.AsInteger;
|
|
// end;
|
|
// ftWord:
|
|
// begin
|
|
// aParam.AsWord := aValue.AsInteger;
|
|
// end;
|
|
// ftDate:
|
|
// begin
|
|
// aParam.AsDate := Trunc(aValue.AsExtended);
|
|
// end;
|
|
// ftDateTime:
|
|
// begin
|
|
// aParam.AsDateTime := aValue.AsExtended;
|
|
// end;
|
|
// ftBoolean:
|
|
// begin
|
|
// aParam.AsBoolean := aValue.AsBoolean;
|
|
// end;
|
|
// ftMemo:
|
|
// begin
|
|
// aParam.AsMemo := AnsiString(aValue.AsString);
|
|
// end;
|
|
// ftWideMemo:
|
|
// begin
|
|
// aParam.AsWideMemo := aValue.AsString;
|
|
// end;
|
|
// ftBCD:
|
|
// begin
|
|
// aParam.AsBCD := aValue.AsCurrency;
|
|
// end;
|
|
// ftBlob:
|
|
// begin
|
|
// lStream := aValue.AsType<TStream>(false);
|
|
// if Assigned(lStream) then
|
|
// begin
|
|
// lStream.Position := 0;
|
|
// aParam.LoadFromStream(lStream, ftBlob);
|
|
// end
|
|
// else
|
|
// begin
|
|
// aParam.Clear;
|
|
// end;
|
|
// end;
|
|
// else
|
|
// raise Exception.CreateFmt('Unsupported FieldType (%d) for param %s', [Ord(aParam.DataType), aParam.Name]);
|
|
// end;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.LoadByDataset(const aDataSet: TDataSet; const aOptions: TMVCActiveRecordLoadOptions);
|
|
var
|
|
lItem: TPair<TRttiField, string>;
|
|
lField: TField;
|
|
begin
|
|
CheckAction(TMVCEntityAction.eaRetrieve);
|
|
OnBeforeLoad;
|
|
for lItem in fMap do
|
|
begin
|
|
if lItem.Value.IsEmpty then
|
|
begin
|
|
Continue;
|
|
end;
|
|
lField := aDataSet.FindField(lItem.value);
|
|
if lField = nil then
|
|
begin
|
|
if TMVCActiveRecordLoadOption.loIgnoreNotExistentFields in aOptions then
|
|
continue
|
|
else
|
|
raise EMVCActiveRecord.CreateFmt
|
|
('Field [%s] not found in dataset. [HINT] If you dont need it, use loIgnoreNotExistentFields', [lItem.value]);
|
|
end;
|
|
MapColumnToTValue(lItem.value, lField, lItem.Key);
|
|
end;
|
|
if not fPrimaryKeyFieldName.IsEmpty then
|
|
begin
|
|
MapColumnToTValue(fPrimaryKeyFieldName, aDataSet.FieldByName(fPrimaryKeyFieldName), fPrimaryKey);
|
|
end;
|
|
OnAfterLoad;
|
|
end;
|
|
|
|
function TMVCActiveRecord.LoadByPK(id: int64): Boolean;
|
|
var
|
|
SQL: string;
|
|
lDataSet: TDataSet;
|
|
begin
|
|
CheckAction(TMVCEntityAction.eaRetrieve);
|
|
SQL := SQLGenerator.CreateSelectByPKSQL(fTableName, fMap, fPrimaryKeyFieldName, fPrimaryKeyOptions, id);
|
|
lDataSet := ExecQuery(SQL, [id], fConn);
|
|
try
|
|
Result := not lDataSet.Eof;
|
|
if Result then
|
|
begin
|
|
LoadByDataset(lDataSet);
|
|
end;
|
|
finally
|
|
lDataSet.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnAfterDelete;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnAfterInsert;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnAfterInsertOrUpdate;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnAfterLoad;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnAfterUpdate;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeDelete;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeExecuteSQL(var SQL: String);
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeInsert;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeInsertOrUpdate;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeLoad;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnBeforeUpdate;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.OnValidation;
|
|
begin
|
|
// do nothing
|
|
end;
|
|
|
|
class function TMVCActiveRecord.Select(const aClass: TMVCActiveRecordClass; const SQL: string;
|
|
const Params: array of Variant): TMVCActiveRecordList;
|
|
begin
|
|
Result := Select(aClass, SQL, Params, nil);
|
|
end;
|
|
|
|
class function TMVCActiveRecord.Select(const aClass: TMVCActiveRecordClass; const SQL: string;
|
|
const Params: array of Variant; const Connection: TFDConnection): TMVCActiveRecordList;
|
|
var
|
|
lDataSet: TDataSet;
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
Result := TMVCActiveRecordList.Create;
|
|
try
|
|
lDataSet := ExecQuery(SQL, Params, Connection);
|
|
try
|
|
while not lDataSet.Eof do
|
|
begin
|
|
lAR := aClass.Create;
|
|
Result.Add(lAR);
|
|
lAR.LoadByDataset(lDataSet);
|
|
lDataSet.Next;
|
|
end;
|
|
// lDataSet.First;
|
|
// TFile.WriteAllText('output.json', lDataSet.AsJSONArray);
|
|
finally
|
|
lDataSet.Free;
|
|
end;
|
|
except
|
|
Result.Free;
|
|
raise;
|
|
end;
|
|
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.Select<T>(const SQL: string; const Params: array of Variant;
|
|
const Options: TMVCActiveRecordLoadOptions): TObjectList<T>;
|
|
var
|
|
lDataSet: TDataSet;
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
Result := TObjectList<T>.Create(True);
|
|
try
|
|
lDataSet := ExecQuery(SQL, Params);
|
|
try
|
|
while not lDataSet.Eof do
|
|
begin
|
|
lAR := T.Create;
|
|
Result.Add(lAR);
|
|
lAR.LoadByDataset(lDataSet, Options);
|
|
lDataSet.Next;
|
|
end;
|
|
finally
|
|
lDataSet.Free;
|
|
end;
|
|
except
|
|
Result.Free;
|
|
raise;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.SelectDataSet(const SQL: string; const Params: array of Variant): TDataSet;
|
|
begin
|
|
Result := TMVCActiveRecord.ExecQuery(SQL, Params);
|
|
end;
|
|
|
|
function TMVCActiveRecord.SelectRQL(const RQL: string; const MaxRecordCount: Integer): TMVCActiveRecordList;
|
|
begin
|
|
Result := InternalSelectRQL(RQL, MaxRecordCount);
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.SelectRQL<T>(const RQL: string; const MaxRecordCount: Integer): TObjectList<T>;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
lSQL: string;
|
|
begin
|
|
lAR := T.Create;
|
|
try
|
|
lSQL := lAR.SQLGenerator.CreateSQLWhereByRQL(RQL, lAR.GetMapping).Trim;
|
|
// LogD(Format('RQL [%s] => SQL [%s]', [RQL, lSQL]));
|
|
if lSQL.StartsWith('where', True) then
|
|
lSQL := lSQL.Remove(0, 5).Trim;
|
|
Result := Where<T>(lSQL, []);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.SelectRQL(const aClass: TMVCActiveRecordClass; const RQL: string;
|
|
const MaxRecordCount: Integer): TMVCActiveRecordList;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create(True);
|
|
try
|
|
Result := lAR.InternalSelectRQL(RQL, MaxRecordCount);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.SetPK(const aValue: TValue);
|
|
begin
|
|
if fPrimaryKeyFieldName.IsEmpty then
|
|
raise Exception.Create('No primary key defined');
|
|
fPrimaryKey.SetValue(Self, aValue);
|
|
end;
|
|
|
|
function TMVCActiveRecord.SQLGenerator: TMVCSQLGenerator;
|
|
begin
|
|
if not Assigned(fSQLGenerator) then
|
|
begin
|
|
fConn.Connected := True;
|
|
fSQLGenerator := TMVCSQLGeneratorRegistry.Instance.GetSQLGenerator(GetBackEnd).Create(GetMapping);
|
|
end;
|
|
Result := fSQLGenerator;
|
|
end;
|
|
|
|
function TMVCActiveRecord.TableInfo: string;
|
|
var
|
|
keyvalue: TPair<TRttiField, string>;
|
|
begin
|
|
Result := 'Table Name: ' + fTableName;
|
|
for keyvalue in fMap do
|
|
Result := Result + sLineBreak + #9 + keyvalue.Key.Name + ' = ' + keyvalue.value;
|
|
end;
|
|
|
|
procedure TMVCActiveRecord.Update;
|
|
var
|
|
SQL: string;
|
|
begin
|
|
CheckAction(TMVCEntityAction.eaUpdate);
|
|
OnValidation;
|
|
OnBeforeUpdate;
|
|
OnBeforeInsertOrUpdate;
|
|
if fMapNonTransientFields.Count = 0 then
|
|
begin
|
|
raise EMVCActiveRecord.CreateFmt
|
|
('Cannot update an entity if all fields are transient. Class [%s] mapped on table [%s]', [ClassName, fTableName]);
|
|
end;
|
|
SQL := SQLGenerator.CreateUpdateSQL(fTableName, fMapNonTransientFields, fPrimaryKeyFieldName, fPrimaryKeyOptions);
|
|
ExecNonQuery(SQL, false);
|
|
OnAfterUpdate;
|
|
OnAfterInsertOrUpdate;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.All(const aClass: TMVCActiveRecordClass): TObjectList<TMVCActiveRecord>;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create;
|
|
try
|
|
Result := Select(aClass, lAR.GenerateSelectSQL, []);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.All<T>: TObjectList<T>;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := T.Create;
|
|
try
|
|
Result := Select<T>(lAR.GenerateSelectSQL, []);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecord.Where(const aClass: TMVCActiveRecordClass; const SQLWhere: string;
|
|
const Params: array of Variant): TMVCActiveRecordList;
|
|
begin
|
|
Result := Where(aClass, SQLWhere, Params, nil);
|
|
end;
|
|
|
|
class function TMVCActiveRecord.Where(const aClass: TMVCActiveRecordClass; const SQLWhere: string;
|
|
const Params: array of Variant; const Connection: TFDConnection): TMVCActiveRecordList;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := aClass.Create;
|
|
try
|
|
Result := Select(aClass, lAR.GenerateSelectSQL + SQLWhere, Params, Connection);
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
|
|
class function TMVCActiveRecordHelper.Where<T>(const SQLWhere: string; const Params: array of Variant): TObjectList<T>;
|
|
var
|
|
lAR: TMVCActiveRecord;
|
|
begin
|
|
lAR := T.Create;
|
|
try
|
|
if SQLWhere.Trim.IsEmpty() or SQLWhere.Trim.StartsWith('/*limit*/') or SQLWhere.Trim.StartsWith('/*sort*/') then
|
|
begin
|
|
Result := Select<T>(lAR.GenerateSelectSQL + SQLWhere, Params);
|
|
end
|
|
else
|
|
begin
|
|
Result := Select<T>(lAR.GenerateSelectSQL + ' WHERE ' + SQLWhere, Params);
|
|
end;
|
|
finally
|
|
lAR.Free;
|
|
end;
|
|
end;
|
|
{ PrimaryKeyAttribute }
|
|
|
|
// constructor MVCPrimaryKeyAttribute.Create(const aFieldName: string);
|
|
// begin
|
|
// Create(aFieldName, []);
|
|
// end;
|
|
//
|
|
// constructor MVCPrimaryKeyAttribute.Create(const aFieldName: string; const aFieldOptions: TMVCActiveRecordFieldOptions);
|
|
// begin
|
|
// inherited Create;
|
|
// FieldName := aFieldName;
|
|
// FieldOptions := aFieldOptions;
|
|
// end;
|
|
|
|
{ TMVCEntitiesRegistry }
|
|
|
|
procedure TMVCEntitiesRegistry.AddEntity(const aURLSegment: string; const aActiveRecordClass: TMVCActiveRecordClass);
|
|
begin
|
|
fEntitiesDict.AddOrSetValue(aURLSegment.ToLower, aActiveRecordClass);
|
|
end;
|
|
|
|
procedure TMVCEntitiesRegistry.AddEntityProcessor(const aURLSegment: string;
|
|
const aEntityProcessor: IMVCEntityProcessor);
|
|
begin
|
|
fProcessorsDict.Add(aURLSegment, aEntityProcessor);
|
|
end;
|
|
|
|
constructor TMVCEntitiesRegistry.Create;
|
|
begin
|
|
inherited;
|
|
fEntitiesDict := TDictionary<string, TMVCActiveRecordClass>.Create;
|
|
fProcessorsDict := TDictionary<string, IMVCEntityProcessor>.Create;
|
|
end;
|
|
|
|
destructor TMVCEntitiesRegistry.Destroy;
|
|
begin
|
|
fEntitiesDict.Free;
|
|
fProcessorsDict.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TMVCEntitiesRegistry.FindEntityClassByURLSegment(const aURLSegment: string;
|
|
out aMVCActiveRecordClass: TMVCActiveRecordClass): Boolean;
|
|
begin
|
|
Result := fEntitiesDict.TryGetValue(aURLSegment.ToLower, aMVCActiveRecordClass);
|
|
end;
|
|
|
|
function TMVCEntitiesRegistry.FindProcessorByURLSegment(const aURLSegment: string;
|
|
out aMVCEntityProcessor: IMVCEntityProcessor): Boolean;
|
|
begin
|
|
Result := fProcessorsDict.TryGetValue(aURLSegment.ToLower, aMVCEntityProcessor);
|
|
end;
|
|
|
|
{ EMVCActiveRecord }
|
|
|
|
constructor EMVCActiveRecord.Create(const AMsg: string);
|
|
begin
|
|
inherited Create(http_status.BadRequest, AMsg);
|
|
end;
|
|
|
|
{ EntityActionsAttribute }
|
|
|
|
constructor MVCEntityActionsAttribute.Create(const aEntityAllowedActions: TMVCEntityActions);
|
|
begin
|
|
inherited Create;
|
|
EntityAllowedActions := aEntityAllowedActions;
|
|
end;
|
|
|
|
{ TMVCActiveRecordList }
|
|
|
|
constructor TMVCActiveRecordList.Create;
|
|
begin
|
|
inherited Create(True);
|
|
end;
|
|
|
|
{ TMVCSQLGeneratorRegistry }
|
|
|
|
constructor TMVCSQLGeneratorRegistry.Create;
|
|
begin
|
|
inherited;
|
|
fSQLGenerators := TDictionary<string, TMVCSQLGeneratorClass>.Create;
|
|
end;
|
|
|
|
class constructor TMVCSQLGeneratorRegistry.Create;
|
|
begin
|
|
cLock := TObject.Create;
|
|
end;
|
|
|
|
class destructor TMVCSQLGeneratorRegistry.Destroy;
|
|
begin
|
|
cLock.Free;
|
|
cInstance.Free;
|
|
end;
|
|
|
|
destructor TMVCSQLGeneratorRegistry.Destroy;
|
|
begin
|
|
fSQLGenerators.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TMVCSQLGeneratorRegistry.GetSQLGenerator(const aBackend: string): TMVCSQLGeneratorClass;
|
|
begin
|
|
if not fSQLGenerators.TryGetValue(aBackend, Result) then
|
|
begin
|
|
raise ERQLCompilerNotFound.CreateFmt('SQLGenerator not found for "%s"', [aBackend]);
|
|
end;
|
|
end;
|
|
|
|
class function TMVCSQLGeneratorRegistry.Instance: TMVCSQLGeneratorRegistry;
|
|
begin
|
|
if not Assigned(cInstance) then
|
|
begin
|
|
TMonitor.Enter(cLock);
|
|
try
|
|
if not Assigned(cInstance) then
|
|
begin
|
|
cInstance := TMVCSQLGeneratorRegistry.Create;
|
|
end;
|
|
finally
|
|
TMonitor.Exit(cLock);
|
|
end;
|
|
end;
|
|
Result := cInstance;
|
|
end;
|
|
|
|
procedure TMVCSQLGeneratorRegistry.RegisterSQLGenerator(const aBackend: string;
|
|
const aRQLBackendClass: TMVCSQLGeneratorClass);
|
|
begin
|
|
fSQLGenerators.AddOrSetValue(aBackend, aRQLBackendClass);
|
|
end;
|
|
|
|
procedure TMVCSQLGeneratorRegistry.UnRegisterSQLGenerator(const aBackend: string);
|
|
begin
|
|
fSQLGenerators.Remove(aBackend);
|
|
end;
|
|
|
|
{ TMVCSQLGenerator }
|
|
|
|
constructor TMVCSQLGenerator.Create(Mapping: TMVCFieldsMapping);
|
|
begin
|
|
inherited Create;
|
|
fMapping := Mapping;
|
|
end;
|
|
|
|
function TMVCSQLGenerator.GetMapping: TMVCFieldsMapping;
|
|
begin
|
|
Result := fMapping;
|
|
end;
|
|
|
|
destructor TMVCSQLGenerator.Destroy;
|
|
begin
|
|
fCompiler.Free;
|
|
fRQL2SQL.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TMVCSQLGenerator.GetCompiler: TRQLCompiler;
|
|
begin
|
|
if fCompiler = nil then
|
|
begin
|
|
fCompiler := GetCompilerClass.Create(fMapping);
|
|
end;
|
|
Result := fCompiler;
|
|
end;
|
|
|
|
function TMVCSQLGenerator.GetRQLParser: TRQL2SQL;
|
|
begin
|
|
if fRQL2SQL = nil then
|
|
begin
|
|
fRQL2SQL := TRQL2SQL.Create; // (20);
|
|
end;
|
|
Result := fRQL2SQL;
|
|
end;
|
|
|
|
function TMVCSQLGenerator.TableFieldsDelimited(const Map: TDictionary<TRttiField, string>; const PKFieldName: string;
|
|
const Delimiter: string): string;
|
|
var
|
|
lPair: TPair<TRttiField, string>;
|
|
begin
|
|
for lPair in Map do
|
|
begin
|
|
if not lPair.Value.IsEmpty then
|
|
begin
|
|
Result := Result + lPair.value + Delimiter;
|
|
end;
|
|
end;
|
|
Result := Copy(Result, 1, Length(Result) - Length(Delimiter));
|
|
if not PKFieldName.IsEmpty then
|
|
begin
|
|
Result := PKFieldName + ',' + Result;
|
|
end;
|
|
end;
|
|
|
|
{ TMVCConnectionsRepository.TConnHolder }
|
|
|
|
destructor TMVCConnectionsRepository.TConnHolder.Destroy;
|
|
begin
|
|
if OwnsConnection then
|
|
Begin
|
|
if Connection.Connected then
|
|
Connection.Connected := false;
|
|
FreeAndNil(Connection);
|
|
End;
|
|
inherited;
|
|
end;
|
|
|
|
constructor MVCTableFieldAttribute.Create(const aFieldName: string; const aFieldOptions: TMVCActiveRecordFieldOptions);
|
|
begin
|
|
inherited Create;
|
|
FieldName := aFieldName;
|
|
FieldOptions := aFieldOptions;
|
|
end;
|
|
|
|
initialization
|
|
|
|
gLock := TObject.Create;
|
|
gCtx := TRttiContext.Create;
|
|
gCtx.FindType('');
|
|
|
|
finalization
|
|
|
|
gCtx.Free;
|
|
gLock.Free;
|
|
|
|
end.
|