delphimvcframework/samples/activerecord_showcase/EntitiesU.pas

// *************************************************************************** }
//
// Delphi MVC Framework
//
// Copyright (c) 2010-2020 Daniele Teti and the DMVCFramework Team
//
// https://github.com/danieleteti/delphimvcframework
//
// ***************************************************************************
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// ***************************************************************************

unit EntitiesU;
{$RTTI EXPLICIT METHODS([vcPublic, vcPublished]) FIELDS([vcPrivate, vcProtected, vcPublic, vcPublished]) PROPERTIES([vcPublic, vcPublished])}

interface

uses
  MVCFramework.Serializer.Commons,
  MVCFramework.ActiveRecord,
  System.Generics.Collections,
  System.Classes,
  FireDAC.Stan.Param,
  MVCFramework.Nullables;

type

  [MVCNameCase(ncLowerCase)]
  [MVCTable('articles')]
  TArticle = class(TMVCActiveRecord)
  private
    [MVCTableField('ID')]
    fID: NullableInt32;
    [MVCTableField('code')]
    fCodice: NullableString;
    [MVCTableField('description')]
    fDescrizione: string;
    [MVCTableField('price')]
    fPrezzo: Currency;
  public
    constructor Create; override;
    destructor Destroy; override;
    property ID: NullableInt32 read fID write fID;
    property Code: NullableString read fCodice write fCodice;
    property Description: string read fDescrizione write fDescrizione;
    property Price: Currency read fPrezzo write fPrezzo;
  end;

  TOrder = class;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('customers')]
  TCustomer = class(TMVCActiveRecord)
  private
{$IFNDEF USE_SEQUENCES}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated])]
{$ELSE}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated], 'SEQ_CUSTOMERS_ID' { required for interbase } )]
{$ENDIF}
    fID: NullableInt64;
    [MVCTableField('code')]
    fCode: NullableString;
    [MVCTableField('description')]
    fCompanyName: NullableString;
    [MVCTableField('city')]
    fCity: string;
    [MVCTableField('rating')]
    fRating: NullableInt32;
    [MVCTableField('note')]
    fNote: String;
  public
    constructor Create; override;
    destructor Destroy; override;
    property ID: NullableInt64 read fID write fID;
    property Code: NullableString read fCode write fCode;
    property CompanyName: NullableString read fCompanyName write fCompanyName;
    property City: string read fCity write fCity;
    property Rating: NullableInt32 read fRating write fRating;
    property Note: String read fNote write fNote;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('customers')]
  TCustomerWithTransient = class(TMVCActiveRecord)
  private
{$IFNDEF USE_SEQUENCES}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated])]
{$ELSE}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated], 'SEQ_CUSTOMERS_ID' { required for interbase } )]
{$ENDIF}
    fID: Integer;
    [MVCTableField('code', [foTransient])]
    fCode: string;
    [MVCTableField('', [foTransient])]
    fFormattedCode: string;
    [MVCTableField('description')]
    fCompanyName: string;
    [MVCTableField('city')]
    fCity: string;
    procedure SetFormattedCode(const Value: String);
  public
    property ID: Integer read fID write fID;
    property Code: string read fCode write fCode;
    property FormattedCode: String read fFormattedCode write SetFormattedCode;
    property CompanyName: string read fCompanyName write fCompanyName;
    property City: string read fCity write fCity;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('order_details')]
  TOrderDetail = class(TMVCActiveRecord)
  private
{$IFNDEF USE_SEQUENCES}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated])]
{$ELSE}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated], 'SEQ_order_details_ID' { required for interbase } )]
{$ENDIF}
    fID: Integer;
    [MVCTableField('id_order')]
    fOrderID: Integer;
    [MVCTableField('id_article')]
    fArticleID: Integer;
    [MVCTableField('unit_price')]
    fPrice: Currency;
    [MVCTableField('discount')]
    fDiscount: Integer;
    [MVCTableField('quantity')]
    fQuantity: Integer;
    [MVCTableField('description')]
    fDescription: string;
    [MVCTableField('total')]
    fTotal: Currency;
  public
    constructor Create; override;
    destructor Destroy; override;
    property ID: Integer read fID write fID;
    property OrderID: Integer read fOrderID write fOrderID;
    property ArticleID: Integer read fArticleID write fArticleID;
    property Price: Currency read fPrice write fPrice;
    property Discount: Integer read fDiscount write fDiscount;
    property Quantity: Integer read fQuantity write fQuantity;
    property Description: string read fDescription write fDescription;
    property Total: Currency read fTotal write fTotal;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('orders')]
  TOrder = class(TMVCActiveRecord)
  private
{$IFNDEF USE_SEQUENCES}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated])]
{$ELSE}
    [MVCTableField('id', [foPrimaryKey, foAutoGenerated], 'SEQ_ORDERS_ID' { required for interbase } )]
{$ENDIF}
    fID: Integer;
    [MVCTableField('id_customer')]
    fCustomerID: Integer;
    [MVCTableField('order_date')]
    fOrderDate: TDate;
    [MVCTableField('total')]
    fTotal: Currency;
  public
    constructor Create; override;
    destructor Destroy; override;
    property ID: Integer read fID write fID;
    property CustomerID: Integer read fCustomerID write fCustomerID;
    property OrderDate: TDate read fOrderDate write fOrderDate;
    property Total: Currency read fTotal write fTotal;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('customers')]
  TCustomerEx = class(TCustomer)
  private
    fOrders: TObjectList<TOrder>;
    function GetOrders: TObjectList<TOrder>;
  protected
    procedure OnAfterLoad; override;
    procedure OnAfterInsert; override;
  public
    destructor Destroy; override;
    property Orders: TObjectList<TOrder> read GetOrders;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('customers')]
  TCustomerWithLogic = class(TCustomer)
  private
    fIsLocatedInRome: Boolean;
  protected
    procedure OnAfterLoad; override;
    procedure OnBeforeInsertOrUpdate; override;
    procedure OnValidation; override;
  public
    property IsLocatedInRome: Boolean read fIsLocatedInRome;
  end;

  [MVCNameCase(ncLowerCase)]
  [MVCTable('nullables_test')]
  TNullablesTest = class(TMVCActiveRecord)
  private
    [MVCTableField('f_int2')]
    ff_int2: NullableInt16;
    [MVCTableField('f_int4')]
    ff_int4: NullableInt32;
    [MVCTableField('f_int8')]
    ff_int8: NullableInt64;
    [MVCTableField('f_date')]
    ff_date: NullableTDate;
    [MVCTableField('f_time')]
    ff_time: NullableTTime;
    [MVCTableField('f_bool')]
    ff_bool: NullableBoolean;
    [MVCTableField('f_datetime')]
    ff_datetime: NullableTDateTime;
    [MVCTableField('f_float4')]
    ff_float4: NullableSingle;
    [MVCTableField('f_float8')]
    ff_float8: NullableDouble;
    [MVCTableField('f_string')]
    ff_string: NullableString;
    [MVCTableField('f_currency')]
    ff_currency: NullableCurrency;
    [MVCTableField('f_blob')]
    ff_blob: TStream;
  public
    constructor Create; override;
    destructor Destroy; override;
    // f_int2 int2 NULL,
    property f_int2: NullableInt16 read ff_int2 write ff_int2;
    // f_int4 int4 NULL,
    property f_int4: NullableInt32 read ff_int4 write ff_int4;
    // f_int8 int8 NULL,
    property f_int8: NullableInt64 read ff_int8 write ff_int8;
    // f_string varchar NULL,
    property f_string: NullableString read ff_string write ff_string;
    // f_bool bool NULL,
    property f_bool: NullableBoolean read ff_bool write ff_bool;
    // f_date date NULL,
    property f_date: NullableTDate read ff_date write ff_date;
    // f_time time NULL,
    property f_time: NullableTTime read ff_time write ff_time;
    // f_datetime timestamp NULL,
    property f_datetime: NullableTDateTime read ff_datetime write ff_datetime;
    // f_float4 float4 NULL,
    property f_float4: NullableSingle read ff_float4 write ff_float4;
    // f_float8 float8 NULL,
    property f_float8: NullableDouble read ff_float8 write ff_float8;
    // f_currency numeric(18,4) NULL
    property f_currency: NullableCurrency read ff_currency write ff_currency;
    // f_blob bytea NULL
    property f_blob: TStream read ff_blob write ff_blob;
  end;

implementation

uses
  System.SysUtils, Data.DB;

constructor TArticle.Create;
begin
  inherited Create;
end;

destructor TArticle.Destroy;
begin
  inherited;
end;

constructor TCustomer.Create;
begin
  inherited Create;
end;

destructor TCustomer.Destroy;
begin

  inherited;
end;

constructor TOrderDetail.Create;
begin
  inherited Create;
end;

destructor TOrderDetail.Destroy;
begin
  inherited;
end;

constructor TOrder.Create;
begin
  inherited Create;
end;

destructor TOrder.Destroy;
begin
  inherited;
end;

{ TCustomerEx }

destructor TCustomerEx.Destroy;
begin
  fOrders.Free;
  inherited;
end;

function TCustomerEx.GetOrders: TObjectList<TOrder>;
begin
  if not Assigned(fOrders) then
  begin
    fOrders := TObjectList<TOrder>.Create(True);
  end;
  Result := fOrders;
end;

procedure TCustomerEx.OnAfterInsert;
begin
  inherited;
end;

procedure TCustomerEx.OnAfterLoad;
begin
  inherited;
  if Self.ID.HasValue then
  begin
    fOrders.Free;
    fOrders := TMVCActiveRecord.Where<TOrder>('id_customer = ?', [Self.ID]);
  end;
end;

{ TCustomerWithLogic }

procedure TCustomerWithLogic.OnAfterLoad;
begin
  inherited;
  fIsLocatedInRome := fCity = 'ROME';
end;

procedure TCustomerWithLogic.OnBeforeInsertOrUpdate;
begin
  inherited;
  fCompanyName := fCompanyName.ValueOrDefault.ToUpper;
  fCity := fCity.ToUpper;
end;

procedure TCustomerWithLogic.OnValidation;
begin
  inherited;
  if fCompanyName.ValueOrDefault.IsEmpty or fCity.Trim.IsEmpty or fCode.Value.Trim.IsEmpty then
    raise Exception.Create('CompanyName, City and Code are required');
end;

{ TCustomerWithTransient }

procedure TCustomerWithTransient.SetFormattedCode(const Value: String);
begin
  fFormattedCode := Value;
end;

{ TNullablesTest }

constructor TNullablesTest.Create;
begin
  inherited Create;
  // ff_blob := TMemoryStream.Create;
end;

destructor TNullablesTest.Destroy;
begin
  ff_blob.Free;
  inherited;
end;

end.