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delphimvcframework/samples/activerecord_showcase/MainFormU.pas

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unit MainFormU;
interface
uses
Winapi.Windows,
Winapi.Messages,
System.SysUtils,
System.Variants,
System.Classes,
Vcl.Graphics,
Vcl.Controls,
Vcl.Forms,
Vcl.Dialogs,
Vcl.StdCtrls,
FireDAC.Stan.Intf,
FireDAC.Stan.Option,
FireDAC.Stan.Error,
FireDAC.UI.Intf,
FireDAC.Phys.Intf,
FireDAC.Stan.Def,
FireDAC.Stan.Pool,
FireDAC.Stan.Async,
FireDAC.Phys,
FireDAC.VCLUI.Wait,
Data.DB,
FireDAC.Comp.Client,
MVCFramework.Nullables,
MVCFramework.ActiveRecord,
System.Generics.Collections, System.Diagnostics;
type
TMainForm = class(TForm)
btnCRUD: TButton;
btnSelect: TButton;
Memo1: TMemo;
btnRelations: TButton;
btnInheritance: TButton;
btnValidation: TButton;
btnMultiThreading: TButton;
btnRQL: TButton;
btnReadOnlyFields: TButton;
FDConnection1: TFDConnection;
btnNullTest: TButton;
btnCRUDNoAutoInc: TButton;
btnCRUDWithStringPKs: TButton;
btnWithSpaces: TButton;
btnCountWithRQL: TButton;
btnReadAndWriteOnly: TButton;
btnClientGeneratedPK: TButton;
btnAttributes: TButton;
btnJSON_XML_Types: TButton;
btnMerge: TButton;
btnTableFilter: TButton;
btnPartitioning: TButton;
btnCRUDWithGUID: TButton;
btnOOP: TButton;
btnReadOnly: TButton;
btnSpeed: TButton;
btnRefresh: TButton;
procedure btnCRUDClick(Sender: TObject);
procedure btnInheritanceClick(Sender: TObject);
procedure btnMultiThreadingClick(Sender: TObject);
procedure btnRelationsClick(Sender: TObject);
procedure btnRQLClick(Sender: TObject);
procedure btnSelectClick(Sender: TObject);
procedure btnValidationClick(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure btnReadOnlyFieldsClick(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure btnNullablesClick(Sender: TObject);
procedure btnNullTestClick(Sender: TObject);
procedure btnCRUDNoAutoIncClick(Sender: TObject);
procedure btnCRUDWithStringPKsClick(Sender: TObject);
procedure btnWithSpacesClick(Sender: TObject);
procedure btnCountWithRQLClick(Sender: TObject);
procedure btnReadAndWriteOnlyClick(Sender: TObject);
procedure btnClientGeneratedPKClick(Sender: TObject);
procedure btnAttributesClick(Sender: TObject);
procedure btnJSON_XML_TypesClick(Sender: TObject);
procedure btnMergeClick(Sender: TObject);
procedure btnTableFilterClick(Sender: TObject);
procedure btnPartitioningClick(Sender: TObject);
procedure btnCRUDWithGUIDClick(Sender: TObject);
procedure btnOOPClick(Sender: TObject);
procedure btnReadOnlyClick(Sender: TObject);
procedure btnSpeedClick(Sender: TObject);
procedure btnRefreshClick(Sender: TObject);
private
procedure Log(const Value: string);
procedure LoadCustomers;
public
{ Public declarations }
end;
var
MainForm: TMainForm;
implementation
{$R *.dfm}
uses
EntitiesU,
System.Threading,
MVCFramework.DataSet.Utils,
MVCFramework.RQL.Parser,
System.Math,
FDConnectionConfigU,
EngineChoiceFormU,
System.Rtti;
const
Cities: array [0 .. 4] of string = ('Rome', 'New York', 'London', 'Melbourne', 'Berlin');
CompanySuffix: array [0 .. 5] of string = ('Corp.', 'Inc.', 'Ltd.', 'Srl', 'SPA', 'doo');
Stuff: array [0 .. 4] of string = ('Burger', 'GAS', 'Motors', 'House', 'Boats');
procedure TMainForm.btnAttributesClick(Sender: TObject);
var
lCustomer: TCustomer;
lID: Integer;
begin
Log('** Dynamic Properties Access');
lCustomer := TCustomer.Create;
try
lCustomer.Attributes['CompanyName'] := 'Google Inc.';
lCustomer.Attributes['City'] := 'Montain View, CA';
lCustomer.Attributes['Note'] := 'Hello there!';
lCustomer.Attributes['Code'] := 'XX123';
lCustomer.Attributes['Rating'] := 3;
lCustomer.Insert;
lID := lCustomer.ID;
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert('Google Inc.' = lCustomer.Attributes['CompanyName'].AsType<NullableString>().Value);
Assert('Montain View, CA' = lCustomer.Attributes['City'].AsString);
Assert('XX123' = lCustomer.Attributes['Code'].AsType<NullableString>().Value);
Assert('Hello there!' = lCustomer.Attributes['Note'].AsString);
lCustomer.Update;
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '9012';
lCustomer.Update;
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnClientGeneratedPKClick(Sender: TObject);
var
lCustomer: TCustomerPlainWithClientPK;
begin
Log('** OnBeforeInsert and SetPK');
lCustomer := TCustomerPlainWithClientPK.Create();
try
lCustomer.Store;
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnCountWithRQLClick(Sender: TObject);
var
lRQL: string;
lCustomer: TCustomer;
I: Integer;
begin
Log('** TMVCActiveRecord.Count<TCustomer>(RQL) [Just uses Filter]');
TMVCActiveRecord.DeleteAll(TCustomer);
for I := 1 to 30 do
begin
lCustomer := TCustomer.Create;
try
lCustomer.Code := Format('%5.5d', [TThread.CurrentThread.ThreadID, I]);
lCustomer.City := Cities[Random(high(Cities) + 1)];
lCustomer.CompanyName := Format('%s %s %s', [lCustomer.City, Stuff[Random(high(Stuff) + 1)],
CompanySuffix[Random(high(CompanySuffix) + 1)]]);
lCustomer.Note := lCustomer.CompanyName + ' is from ' + lCustomer.City;
lCustomer.Insert;
finally
lCustomer.Free;
end;
end;
lRQL := 'contains(city,"e")';
Log(lRQL + ' => ' + TMVCActiveRecord.Count<TCustomer>(lRQL).ToString);
lRQL := 'contains(city,"e");sort(+city)';
Log(lRQL + ' => ' + TMVCActiveRecord.Count<TCustomer>(lRQL).ToString);
lRQL := 'contains(city,"e");limit(1,1)';
Log(lRQL + ' => ' + TMVCActiveRecord.Count<TCustomer>(lRQL).ToString);
lRQL := 'contains(city,"e");sort(+city);limit(1,1)';
Log(lRQL + ' => ' + TMVCActiveRecord.Count<TCustomer>(lRQL).ToString);
lRQL := 'contains(city,"e");sort(+city);limit(0,5)';
Log(lRQL + ' => ' + TMVCActiveRecord.Count<TCustomer>(lRQL).ToString);
end;
procedure TMainForm.btnCRUDClick(Sender: TObject);
var
lCustomer: TCustomer;
lID: Integer;
lTestNote: string;
begin
Log('** Simple CRUD test');
Log('There are ' + TMVCActiveRecord.Count<TCustomer>().ToString + ' row/s for entity ' +
TCustomer.ClassName);
lCustomer := TCustomer.Create;
try
Log('Entity ' + TCustomer.ClassName + ' is mapped to table ' + lCustomer.TableName);
lCustomer.CompanyName := 'Google Inc.';
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁';
lCustomer.Insert;
lID := lCustomer.ID;
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert(not lCustomer.Code.HasValue);
lCustomer.Code.Value := '5678';
lCustomer.Note := lCustomer.Note + sLineBreak + 'Code changed to 5678 🙂';
lTestNote := lCustomer.Note;
lCustomer.Update;
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '😉9012🙂';
lCustomer.Update;
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
lCustomer.LoadByPK(lID);
Assert(lCustomer.Code.Value = '😉9012🙂');
Assert(lCustomer.Note = lTestNote);
lCustomer.Update;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
lCustomer.Delete;
Log('Just deleted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnCRUDNoAutoIncClick(Sender: TObject);
var
lCustomer: TCustomerPlain;
lID: Integer;
I: Integer;
begin
Log('** Simple CRUD (no autoinc) test');
Log('There are ' + TMVCActiveRecord.Count<TCustomerPlain>().ToString + ' row/s for entity ' +
TCustomerPlain.ClassName);
TMVCActiveRecord.DeleteAll(TCustomerPlain);
Log('Deleting all entities ' + TCustomerPlain.ClassName);
for I := 1 to 100 do
begin
lCustomer := TCustomerPlain.Create;
try
lCustomer.ID := I;
// just for test!!
case I mod 3 of
0:
lCustomer.CompanyName := 'Google Inc.';
1:
lCustomer.CompanyName := 'bit Time Professionals';
2:
lCustomer.CompanyName := 'Walt Disney Corp.';
end;
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Hello there!';
lCustomer.CreationTime := Time;
lCustomer.CreationDate := Date;
lCustomer.Insert;
lID := lCustomer.ID;
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
end;
Log('Now there are ' + TMVCActiveRecord.Count<TCustomerPlain>().ToString + ' row/s for entity ' +
TCustomerPlain.ClassName);
TMVCActiveRecord.DeleteRQL(TCustomerPlain, 'lt(id,90)');
lCustomer := TMVCActiveRecord.GetByPK<TCustomerPlain>(lID);
try
Assert(not lCustomer.Code.HasValue);
lCustomer.Code.Value := '5678';
lCustomer.Note := lCustomer.Note + sLineBreak + 'Code changed to 5678';
lCustomer.Update;
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TCustomerPlain.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '9012';
lCustomer.Update;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomerPlain>(lID);
try
lCustomer.Delete;
Log('Just deleted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnCRUDWithGUIDClick(Sender: TObject);
var
lTestNote: string;
lCustWithGUID: TCustomerWithGUID;
lIDGUID: TGUID;
begin
TMVCActiveRecord.DeleteAll(TCustomerWithGUID);
Log('** Using GUID as primary key');
lCustWithGUID := TCustomerWithGUID.Create;
try
Log('Entity ' + TCustomerWithGUID.ClassName + ' is mapped to table ' + lCustWithGUID.TableName);
lCustWithGUID.GUID := TGUID.NewGuid;
lCustWithGUID.CompanyName := 'Google Inc.';
lCustWithGUID.City := 'Montain View, CA';
lCustWithGUID.Note := 'Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁';
lCustWithGUID.Insert;
lIDGUID := lCustWithGUID.GUID;
Log('Just inserted Customer With GUID ' + lIDGUID.ToString);
finally
lCustWithGUID.Free;
end;
lCustWithGUID := TMVCActiveRecord.GetByPK<TCustomerWithGUID>(lIDGUID);
try
Assert(not lCustWithGUID.Code.HasValue);
lCustWithGUID.Code.Value := '5678';
lCustWithGUID.Note := lCustWithGUID.Note + sLineBreak + 'Code changed to 5678 🙂';
lTestNote := lCustWithGUID.Note;
lCustWithGUID.Update;
Log('Just updated Customer ' + lIDGUID.ToString);
finally
lCustWithGUID.Free;
end;
lCustWithGUID := TCustomerWithGUID.Create;
try
lCustWithGUID.LoadByPK(lIDGUID);
lCustWithGUID.Code.Value := '😉9012🙂';
lCustWithGUID.Update;
finally
lCustWithGUID.Free;
end;
lCustWithGUID := TMVCActiveRecord.GetByPK<TCustomerWithGUID>(lIDGUID);
try
lCustWithGUID.Delete;
Log('Just deleted Customer ' + lIDGUID.ToString);
finally
lCustWithGUID.Free;
end;
end;
procedure TMainForm.btnCRUDWithStringPKsClick(Sender: TObject);
var
lCustomer: TCustomerWithCode;
lCode: string;
I: Integer;
begin
Log('** Simple CRUD (with string pks) test');
Log('There are ' + TMVCActiveRecord.Count<TCustomerWithCode>().ToString + ' row/s for entity ' +
TCustomerWithCode.ClassName);
TMVCActiveRecord.DeleteAll(TCustomerWithCode);
Log('Deleting all entities ' + TCustomerWithCode.ClassName);
for I := 1 to 100 do
begin
lCustomer := TCustomerWithCode.Create;
try
lCustomer.Code := I.ToString.PadLeft(4, '0');
// just for test!!
case I mod 3 of
0:
lCustomer.CompanyName := 'Google Inc.';
1:
lCustomer.CompanyName := 'bit Time Professionals';
2:
lCustomer.CompanyName := 'Walt Disney Corp.';
end;
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Hello there!';
lCustomer.Insert;
lCode := lCustomer.Code.Value;
Log('Just inserted Customer ' + lCode);
finally
lCustomer.Free;
end;
end;
Log('Now there are ' + TMVCActiveRecord.Count<TCustomerWithCode>().ToString + ' row/s for entity '
+ TCustomerPlain.ClassName);
TMVCActiveRecord.DeleteRQL(TCustomerWithCode, 'lt(code,"0090")');
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithCode>(lCode);
try
Assert(lCustomer.Code.HasValue);
lCustomer.Note := lCustomer.Note + sLineBreak + 'Note changed!';
lCustomer.Update;
Log('Just updated Customer ' + lCode);
finally
lCustomer.Free;
end;
lCustomer := TCustomerWithCode.Create;
try
lCustomer.LoadByPK(lCode);
lCustomer.CompanyName := 'My New Company!';
lCustomer.Update;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithCode>(lCode);
try
lCustomer.Delete;
Log('Just deleted Customer ' + lCode);
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnInheritanceClick(Sender: TObject);
var
lCustomerEx: TCustomerEx;
begin
Log('** Inheritace test');
lCustomerEx := TCustomerEx.Create;
try
lCustomerEx.LoadByPK(1);
finally
lCustomerEx.Free;
end;
end;
procedure TMainForm.btnJSON_XML_TypesClick(Sender: TObject);
var
lCTypes: TComplexTypes;
lID: Int64;
begin
if GetBackEndByConnection(TMVCActiveRecord.CurrentConnection) = TMVCActiveRecordBackEnd.PostgreSQL then
begin
TMVCActiveRecord.DeleteAll(TComplexTypes);
lCTypes := TComplexTypes.Create;
try
lCTypes.JSON := '{"field_type":"json"}';
lCTypes.JSONB := '{"field_type":"jsonb"}';
lCTypes.XML := '<field_type>xml</field_type>';
lCTypes.Insert;
lID := lCTypes.ID;
finally
lCTypes.Free;
end;
lCTypes := TMVCActiveRecord.GetByPK<TComplexTypes>(lID);
try
lCTypes.JSON := '{"field_type":"json", "updated": true}';
lCTypes.JSONB := '{"field_type":"jsonb", "updated": true}';
lCTypes.XML := '<field_type updated="true">xml</field_type>';
lCTypes.Update;
finally
lCTypes.Free;
end;
Log('Executing ==> (jsonb_field ->> ''updated'')::bool = true');
lCTypes := TMVCActiveRecord.GetFirstByWhere<TComplexTypes>('(jsonb_field ->> ''updated'')::bool = true', []);
try
Log('JSON ==> ' + lCTypes.JSON);
finally
lCTypes.Free;
end;
end;
end;
procedure TMainForm.btnMergeClick(Sender: TObject);
var
lCustomer: TCustomer;
lCustomers: TObjectList<TCustomer>;
lCustomersChanges: TObjectList<TCustomer>;
begin
Log('** IMVCMultiExecutor demo');
TMVCActiveRecord.DeleteAll(TCustomer);
LoadCustomers;
lCustomers := TMVCActiveRecord.SelectRQL<TCustomer>('eq(rating,1)', 1000);
try
lCustomersChanges := TObjectList<TCustomer>.Create(True);
try
//these 2 customers will be updated
lCustomer := TCustomer.Create;
lCustomersChanges.Add(lCustomer);
lCustomer.ID := lCustomers[0].ID;
lCustomer.Code := 'C8765';
lCustomer.CompanyName := '(changed) Company1';
lCustomer.City := '(changed) City';
lCustomer.Rating := 1;
lCustomer := TCustomer.Create;
lCustomersChanges.Add(lCustomer);
lCustomer.ID := lCustomers[1].ID;
lCustomer.Code := lCustomers[1].Code;
lCustomer.CompanyName := '(changed) Company2';
lCustomer.City := '(changed) City';
lCustomer.Rating := 1;
//these 2 customer will be created
lCustomer := TCustomer.Create;
lCustomersChanges.Add(lCustomer);
lCustomer.Code := 'C9898';
lCustomer.CompanyName := '(new) Company3';
lCustomer.City := '(new) New City2';
lCustomer.Rating := 1;
lCustomer := TCustomer.Create;
lCustomersChanges.Add(lCustomer);
lCustomer.Code := 'C2343';
lCustomer.CompanyName := '(new) Company4';
lCustomer.City := '(new) New City2';
lCustomer.Rating := 1;
//all the other customers will be deleted
//calculate the unit-of-work to merge the lists
var lUOW := TMVCActiveRecord.Merge<TCustomer>(lCustomers, lCustomersChanges);
//apply the UnitOfWork
lUOW.Apply(
procedure (const Customer: TCustomer; const EntityAction: TMVCEntityAction; var Handled: Boolean)
begin
Handled := False; //set it to true to execute action manually
case EntityAction of
eaCreate: Log('Inserting Customer : ' + Customer.ToString);
eaUpdate: Log('Updating Customer : ' + Customer.ToString);
eaDelete: Log('Deleting Customer : ' + Customer.ToString);
end;
end);
finally
lCustomersChanges.Free;
end;
finally
lCustomers.Free;
end;
lCustomers := TMVCActiveRecord.SelectRQL<TCustomer>('eq(rating,1)', 1000);
try
Assert(lCustomers.Count = 4, 'Expected 4 customers, got ' + lCustomers.Count.ToString);
finally
lCustomers.Free;
end;
end;
procedure TMainForm.btnMultiThreadingClick(Sender: TObject);
var
lTasks: TArray<ITask>;
lProc: TProc;
lConnParams: string;
begin
Log('** Multithreading test');
TMVCActiveRecord.DeleteRQL(TCustomer,
'in(City,["Rome","New York","London","Melbourne","Berlin"])');
lConnParams := FDConnection1.Params.Text;
lProc := procedure
var
lConn: TFDConnection;
lCustomer: TCustomer;
I: Integer;
begin
lConn := TFDConnection.Create(nil);
try
lConn.ConnectionDefName := CON_DEF_NAME;
ActiveRecordConnectionsRegistry.AddDefaultConnection(lConn, True);
lConn.Params.Text := lConnParams;
lConn.Open;
for I := 1 to 30 do
begin
lCustomer := TCustomer.Create;
try
lCustomer.Code := Format('%5.5d', [TThread.CurrentThread.ThreadID, I]);
lCustomer.City := Cities[Random(high(Cities) + 1)];
lCustomer.CompanyName :=
Format('%s %s %s', [lCustomer.City, Stuff[Random(high(Stuff) + 1)],
CompanySuffix[Random(high(CompanySuffix) + 1)]]);
lCustomer.Note := lCustomer.CompanyName + ' is from ' + lCustomer.City;
lCustomer.Insert;
finally
lCustomer.Free;
end;
end;
finally
ActiveRecordConnectionsRegistry.RemoveDefaultConnection;
end;
end;
lTasks := [TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc),
TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc),
TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc),
TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc), TTask.Run(lProc),
TTask.Run(lProc)];
TTask.WaitForAll(lTasks);
ShowMessage('Just inserted ' + TMVCActiveRecord.Count(TCustomer,
'in(City,["Rome","New York","London","Melbourne","Berlin"])').ToString + ' records');
end;
procedure TMainForm.btnNullablesClick(Sender: TObject);
var
lCustomer: TCustomer;
lID: Integer;
begin
Log('** Nullables Test');
Log('There are ' + TMVCActiveRecord.Count<TCustomer>().ToString + ' row/s for entity ' +
TCustomer.ClassName);
lCustomer := TCustomer.Create;
try
lCustomer.CompanyName := 'Google Inc.';
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Hello there!';
lCustomer.Insert;
lID := lCustomer.ID;
Assert(not lCustomer.Code.HasValue);
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert(not lCustomer.Code.HasValue);
Assert(not lCustomer.Rating.HasValue);
Assert(lCustomer.Rating.ValueOrDefault = 0);
lCustomer.Code.Value := '5678';
lCustomer.Rating.Value := 3;
Assert(lCustomer.Code.HasValue);
lCustomer.Note := lCustomer.Note + sLineBreak + 'Code changed to 5678';
lCustomer.Update;
Assert(lCustomer.Code.HasValue);
Assert(lCustomer.Rating.HasValue);
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert(lCustomer.Code.HasValue);
Assert(lCustomer.Rating.HasValue);
Assert(lCustomer.Code.ValueOrDefault = '5678');
Assert(lCustomer.Rating.ValueOrDefault = 3);
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '9012';
lCustomer.Update;
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnNullTestClick(Sender: TObject);
var
lTest: TNullablesTest;
lCustomer: TCustomer;
lID: Integer;
begin
Log('** Nullables Test');
TMVCActiveRecord.DeleteAll(TNullablesTest);
lTest := TNullablesTest.Create();
try
lTest.f_int2 := 2;
lTest.f_int4 := 4;
lTest.f_int8 := 8;
with TStreamWriter.Create(lTest.f_blob) do
try
write('Hello World');
finally
Free;
end;
lTest.Insert;
Log('Inserting nulls');
finally
lTest.Free;
end;
Log('Loading records with nulls');
lTest := TMVCActiveRecord.GetFirstByWhere<TNullablesTest>('f_int2 = ?', [2]);
try
Assert(lTest.f_int2.HasValue);
Assert(lTest.f_int4.HasValue);
Assert(lTest.f_int8.HasValue);
Assert(not lTest.f_string.HasValue);
Assert(not lTest.f_bool.HasValue);
Assert(not lTest.f_date.HasValue);
Assert(not lTest.f_time.HasValue);
Assert(not lTest.f_datetime.HasValue);
Assert(not lTest.f_float4.HasValue);
Assert(not lTest.f_float8.HasValue);
Assert(not lTest.f_bool.HasValue);
Assert(Assigned(lTest));
lTest.f_int4 := lTest.f_int4.Value + 4;
lTest.f_int8 := lTest.f_int8.Value + 8;
lTest.f_blob.Size := 0;
lTest.Update;
finally
lTest.Free;
end;
lTest := TMVCActiveRecord.GetFirstByWhere<TNullablesTest>('f_int2 = ?', [2]);
try
Assert(lTest.f_int2.ValueOrDefault = 2);
Assert(lTest.f_int4.ValueOrDefault = 8);
Assert(lTest.f_int8.ValueOrDefault = 16);
Assert(not lTest.f_string.HasValue);
Assert(not lTest.f_bool.HasValue);
Assert(not lTest.f_date.HasValue);
Assert(not lTest.f_time.HasValue);
Assert(not lTest.f_datetime.HasValue);
Assert(not lTest.f_float4.HasValue);
Assert(not lTest.f_float8.HasValue);
Assert(not lTest.f_bool.HasValue);
Assert(lTest.f_blob.Size = 0, 'Blob contains a value when should not');
TMVCActiveRecord.DeleteRQL(TNullablesTest, 'eq(f_int2,2)');
finally
lTest.Free;
end;
Assert(TMVCActiveRecord.GetFirstByWhere<TNullablesTest>('f_int2 = 2', [], False) = nil);
lTest := TNullablesTest.Create;
try
lTest.f_int2 := 2;
lTest.f_int4 := 4;
lTest.f_int8 := 8;
lTest.f_string := 'Hello World';
lTest.f_bool := True;
lTest.f_date := EncodeDate(2020, 02, 01);
lTest.f_time := EncodeTime(12, 24, 36, 0);
lTest.f_datetime := Now;
lTest.f_float4 := 1234.5678;
lTest.f_float8 := 12345678901234567890.0123456789;
lTest.f_currency := 1234567890.1234;
lTest.Insert;
finally
lTest.Free;
end;
Log('There are ' + TMVCActiveRecord.Count<TCustomer>().ToString + ' row/s for entity ' +
TCustomer.ClassName);
lCustomer := TCustomer.Create;
try
lCustomer.CompanyName := 'Google Inc.';
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Hello there!';
lCustomer.Insert;
lID := lCustomer.ID;
Assert(not lCustomer.Code.HasValue);
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert(not lCustomer.Code.HasValue);
Assert(not lCustomer.Rating.HasValue);
Assert(lCustomer.Rating.ValueOrDefault = 0);
lCustomer.Code.Value := '5678';
lCustomer.Rating.Value := 3;
Assert(lCustomer.Code.HasValue);
lCustomer.Note := lCustomer.Note + sLineBreak + 'Code changed to 5678';
lCustomer.Update;
Assert(lCustomer.Code.HasValue);
Assert(lCustomer.Rating.HasValue);
Log('Just updated Customer ' + lID.ToString + ' with nulls');
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomer>(lID);
try
Assert(lCustomer.Code.HasValue);
Assert(lCustomer.Rating.HasValue);
Assert(lCustomer.Code.ValueOrDefault = '5678');
Assert(lCustomer.Rating.ValueOrDefault = 3);
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '9012';
lCustomer.Update;
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnPartitioningClick(Sender: TObject);
var
lCust1: TCustomerWithRate1;
lCust2: TCustomerWithRate2;
lList: TObjectList<TCustomerWithRate1>;
begin
Log('** Partitioning Test');
TMVCActiveRecord.DeleteAll(TCustomerWithRate1);
Assert(TMVCActiveRecord.Count(TCustomerWithRate1) = 0);
TMVCActiveRecord.DeleteAll(TCustomerWithRate2);
Assert(TMVCActiveRecord.Count(TCustomerWithRate2) = 0);
lCust1 := TCustomerWithRate1.Create;
try
lCust1.City := 'Rome';
lCust1.Code := '123';
lCust1.Store;
finally
lCust1.Free;
end;
lCust2 := TCustomerWithRate2.Create;
try
lCust2.City := 'Rome';
lCust2.Code := '456';
lCust2.Store;
Assert(TMVCActiveRecord.GetByPK<TCustomerWithRate1>(lCust2.ID, False) = nil);
finally
lCust2.Free;
end;
lList := TMVCActiveRecord.SelectRQL<TCustomerWithRate1>('eq(city,"Rome")',-1);
try
Assert(lList.Count = 1);
Assert(lList[0].Code = '123');
finally
lList.Free;
end;
Log('Retriving only TCustomerWithRate1');
Assert(TMVCActiveRecord.Count(TCustomerWithRate1) = 1);
Assert(TMVCActiveRecord.Count(TCustomerWithRate1, 'eq(code,"xxx")') = 0);
Log('Retriving only TCustomerWithRate2');
Assert(TMVCActiveRecord.Count(TCustomerWithRate2) = 1);
Assert(TMVCActiveRecord.Count(TCustomerWithRate2, 'eq(code,"xxx")') = 0);
end;
procedure TMainForm.btnReadAndWriteOnlyClick(Sender: TObject);
var
lArtWO, lArtWO2: TArticleWithWriteOnlyFields;
lArtRO: TArticleWithReadOnlyFields;
lID: NullableInt32;
lArt: TArticle;
begin
lArtWO := TArticleWithWriteOnlyFields.Create();
try
lArtWO.Description := 'Description1';
lArtWO.Price := 12;
lArtWO.Insert;
Log('Stored TArticleWithWriteOnlyFields');
lID := lArtWO.ID;
lArt := TMVCActiveRecord.GetByPK<TArticle>(lID);
try
Assert(lArtWO.Description = lArt.Description);
Assert(lArtWO.Price = lArt.Price);
Log('Check Stored version of TArticleWithWriteOnlyFields');
Log('Reading data using TArticleWithReadOnlyFields');
lArtRO := TMVCActiveRecord.GetByPK<TArticleWithReadOnlyFields>(lID);
try
Assert(lArtRO.Description = lArt.Description);
Assert(lArtRO.Price = lArt.Price);
Log('Check Read data of TArticleWithWriteOnlyFields using TArticleWithReadOnlyFields');
finally
lArtRO.Free;
end;
Log('Reading data using TArticleWithWriteOnlyFields (???)');
lArtWO2 := TMVCActiveRecord.GetByPK<TArticleWithWriteOnlyFields>(lID);
try
Assert(lArtWO2.ID.ValueOrDefault = lID.ValueOrDefault);
Assert(lArtWO2.Description = '');
Assert(lArtWO2.Price = 0);
finally
lArtWO2.Free;
end;
finally
lArt.Free;
end;
lArtRO := TArticleWithReadOnlyFields.Create();
try
lArtRO.Description := 'Description1';
lArtRO.Price := 12;
ShowMessage('Now an exception will be raised...');
lArtRO.Insert; // exception here :-)
finally
lArtRO.Free;
end;
finally
lArtWO.Free;
end;
end;
procedure TMainForm.btnReadOnlyClick(Sender: TObject);
begin
var lROCustomer := TMVCActiveRecord.GetFirstByWhere<TReadOnlyCustomer>('',[]);
try
lROCustomer.Code := '1234';
ShowMessage('An exception is going to be raised');
lROCustomer.Update();
finally
lROCustomer.Free;
end;
end;
procedure TMainForm.btnRelationsClick(Sender: TObject);
var
lCustomer: TCustomerEx;
lOrder: TOrder;
lOrderRows: TObjectList<TOrderDetail>;
lOrderRow: TOrderDetail;
lOrderDetail: TOrderDetail;
I: Integer;
j: Integer;
begin
Log('** Relations test');
TMVCActiveRecord.DeleteAll(TCustomerEx);
lCustomer := TCustomerEx.Create;
try
lCustomer.Code := '001';
lCustomer.CompanyName := 'Google Inc.';
lCustomer.Insert;
for I := 1 to 3 do
begin
lCustomer.Orders.Add(TOrder.Create);
lCustomer.Orders.Last.CustomerID := lCustomer.ID;
lCustomer.Orders.Last.OrderDate := EncodeDate(2018, 5 + I, 20 + I);
lCustomer.Orders.Last.Total := I * 3;
lCustomer.Orders.Last.Insert;
for j := 1 to 4 do
begin
lOrderDetail := TOrderDetail.Create;
try
lOrderDetail.OrderID := lCustomer.Orders.Last.ID;
lOrderDetail.ArticleID := j;
lOrderDetail.Price := Random(j * 10);
lOrderDetail.Discount := j;
lOrderDetail.Quantity := j * 2;
lOrderDetail.Description := 'MY PRODUCT ' + I.ToString + '/' + j.ToString;
lOrderDetail.Total := j * j * j;
lOrderDetail.Insert;
finally
lOrderDetail.Free;
end;
end;
end;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetOneByWhere<TCustomerEx>('Code = ?', ['001']);
try
Log(lCustomer.CompanyName);
for lOrder in lCustomer.Orders do
begin
Log(Format(' %5.5d - %s - %m', [lOrder.ID, datetostr(lOrder.OrderDate), lOrder.Total]));
lOrderRows := TMVCActiveRecord.Where<TOrderDetail>('id_order = ?', [lOrder.ID]);
try
for lOrderRow in lOrderRows do
begin
Log(Format(' %-20s - %4d - %m', [lOrderRow.Description, lOrderRow.Quantity,
lOrder.Total]));
end;
Log('');
finally
lOrderRows.Free;
end;
end;
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnRQLClick(Sender: TObject);
var
lList: TMVCActiveRecordList;
lItem: TMVCActiveRecord;
lCustomer: TCustomer;
lCustList: TObjectList<TCustomer>;
const
cRQL1 = 'in(City,["Rome","London"]);sort(+code);limit(0,50)';
cRQL2 = 'and(eq(City,"Rome"),or(contains(CompanyName,"GAS"),contains(CompanyName,"Motors")))';
begin
LoadCustomers;
Log('** RQL Queries Test');
Log('>> RQL Query (1) - ' + cRQL1);
lList := TMVCActiveRecord.SelectRQL(TCustomer, cRQL1, 20);
try
Log(lList.Count.ToString + ' record/s found');
for lItem in lList do
begin
lCustomer := TCustomer(lItem);
Log(Format('%5s - %s (%s)', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault, lCustomer.City]));
end;
finally
lList.Free;
end;
Log('>> RQL Query (2) - ' + cRQL2);
lCustList := TMVCActiveRecord.SelectRQL<TCustomer>(cRQL2, 20);
try
Log(lCustList.Count.ToString + ' record/s found');
for lCustomer in lCustList do
begin
Log(Format('%5s - %s (%s)', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault, lCustomer.City]));
end;
finally
lCustList.Free;
end;
Log('**RQL Query (3) - ' + cRQL2);
lList := TMVCActiveRecord.SelectRQL(TCustomer, cRQL2, 20);
try
Log(lList.Count.ToString + ' record/s found');
for lItem in lList do
begin
lCustomer := TCustomer(lItem);
Log(Format('%5s - %s (%s)', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault, lCustomer.City]));
end;
finally
lList.Free;
end;
Log('**RQL Query (4) - <empty> with limit 20');
lList := TMVCActiveRecord.SelectRQL(TCustomer, '', 20);
try
Log(lList.Count.ToString + ' record/s found');
Assert(lList.Count = 20);
finally
lList.Free;
end;
Log('**RQL Query (5) - <empty> sort by code with limit 20');
lList := TMVCActiveRecord.SelectRQL(TCustomer, 'sort(+code)', 20);
try
Log(lList.Count.ToString + ' record/s found');
Assert(lList.Count = 20);
finally
lList.Free;
end;
Log('**RQL Query (6) - <empty> with limit 10');
lList := TMVCActiveRecord.SelectRQL(TCustomer, '', 10);
try
Log(lList.Count.ToString + ' record/s found');
Assert(lList.Count = 10);
finally
lList.Free;
end;
Log('**RQL Query (7) - <empty> with limit 1');
lList := TMVCActiveRecord.SelectRQL(TCustomer, '', 1);
try
Log(lList.Count.ToString + ' record/s found');
Assert(lList.Count = 1);
finally
lList.Free;
end;
Log('**RQL Query (8) - <empty> with limit 0');
lList := TMVCActiveRecord.SelectRQL(TCustomer, '', 0);
try
Log(lList.Count.ToString + ' record/s found');
Assert(lList.Count = 0);
finally
lList.Free;
end;
end;
procedure TMainForm.btnSelectClick(Sender: TObject);
var
lCustomers: TObjectList<TCustomer>;
lCustomer: TCustomer;
lDS: TDataSet;
lID: NullableInt64;
begin
Log('** Query SQL');
// Bypassing the RQL parser you can use DBMS-specific features or just joining your tables.
// This is just a sample, you can do the "select" also using the RQL engine
if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'firebird' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description CONTAINING ?', ['google'])
else if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'mysql' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description LIKE ''%google%''', [])
else if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'postgresql' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description ILIKE ''%google%''', [])
else if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'sqlite' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description LIKE ''%google%''', [])
else if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'interbase' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description LIKE ''%google%''', [])
else if ActiveRecordConnectionsRegistry.GetCurrentBackend = 'mssql' then
lCustomers := TMVCActiveRecord.Select<TCustomer>
('SELECT * FROM customers WHERE description LIKE ''%google%''', [])
else
raise Exception.Create('Unsupported backend: ' +
ActiveRecordConnectionsRegistry.GetCurrentBackend);
try
for lCustomer in lCustomers do
begin
Log(Format('%4d - %8.5s - %s', [lCustomer.ID.ValueOrDefault, lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault]));
end;
finally
lCustomers.Free;
end;
LoadCustomers;
Log('** Query SQL returning DataSet');
lDS := TMVCActiveRecord.SelectDataSet('SELECT * FROM customers', [], True);
try
while not lDS.Eof do
begin
Log(Format('%8.5s - %s', [lDS.FieldByName('code').AsString, lDS.FieldByName('description')
.AsString]));
lDS.Next;
end;
finally
lDS.Free;
end;
lDS := TMVCActiveRecord.SelectDataSet
('SELECT * FROM orders o join customers c on c.id = o.id_customer where o.order_date >= ?',
[Date - 5000], [ftDate]);
try
while not lDS.Eof do
begin
Log(Format('OrderDate: %12s - Customer: %s',
[datetostr(lDS.FieldByName('order_date').AsDateTime), lDS.FieldByName('description')
.AsString]));
lDS.Next;
end;
finally
lDS.Free;
end;
lDS := TMVCActiveRecord.SelectDataSet
('SELECT * FROM orders o left join customers c on c.id = o.id_customer where o.order_date >= ? and c.id > ?',
[Date - 5000, 1], [ftDate]);
try
while not lDS.Eof do
begin
Log(Format('OrderDate: %12s - Customer: %s',
[datetostr(lDS.FieldByName('order_date').AsDateTime), lDS.FieldByName('description')
.AsString]));
lDS.Next;
end;
finally
lDS.Free;
end;
Log('** GetFirstByWhere');
lCustomer := TMVCActiveRecord.GetFirstByWhere<TCustomer>('id > ?', [1]);
try
Log(Format('%8.5s - %s', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault]));
lID := lCustomer.ID;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetFirstByWhere<TCustomer>('id > ?', [1], [ftInteger]);
try
Log(Format('%8.5s - %s', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault]));
lID := lCustomer.ID;
finally
lCustomer.Free;
end;
Log('** GetOneByWhere');
lCustomer := TMVCActiveRecord.GetOneByWhere<TCustomer>('id = ?', [lID.Value]);
try
Log(Format('%8.5s - %s', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault]));
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetOneByWhere<TCustomer>('id = ?', [lID.Value], [ftInteger]);
try
Log(Format('%8.5s - %s', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault]));
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnSpeedClick(Sender: TObject);
var
I: Integer;
lCustomers: TArray<TCustomer>;
lSW: TStopWatch;
lElapsedMS: UInt32;
const
INSTANCES_COUNT = 2000000;
begin
TMVCActiveRecord.DeleteAll(TCustomer);
SetLength(lCustomers, INSTANCES_COUNT);
lSW := TStopwatch.StartNew;
for I := 0 to INSTANCES_COUNT - 1 do
begin
lCustomers[I] := TCustomer.Create;
end;
lElapsedMS := lSW.ElapsedMilliseconds;
Log(Format('Created %s TCustomer instances in %d ms',
[FormatFloat('###,###,###', INSTANCES_COUNT), lElapsedMS]));
for I := 0 to INSTANCES_COUNT - 1 do
begin
lCustomers[I].Free;
end;
end;
procedure TMainForm.btnTableFilterClick(Sender: TObject);
var
i: Integer;
lIDOfABadCustomer: Int64;
lIDOfAGoodCustomer: Int64;
lHowMany: Int64;
lCust: TMVCActiveRecord;
Customer: TCustomer;
lCustomer: TCustomer;
lCustomer1: TCustomer;
lNotAGoodCustomer: TCustomer;
lThisShouldBeNil: TCustomer;
lAGoodCustomer: TCustomer;
lThisShouldNotBeNil: TCustomer;
lGoodCustomers: TObjectList<TGoodCustomer>;
lGoodCustomers2: TMVCActiveRecordList;
begin
Log('**Table Filtering');
Log('Deleting only best customers...');
lIDOfABadCustomer := -1;
lIDOfAGoodCustomer := -1;
TMVCActiveRecord.DeleteAll(TGoodCustomer);
Log('Inserting some customers');
for i := 1 to 5 do
begin
Customer := TCustomer.Create();
try
Customer.Code := I.ToString;
Customer.Rating := I;
Customer.Store;
if i = 1 then
begin
lIDOfABadCustomer := Customer.ID.Value;
end;
if i = 5 then
begin
lIDOfAGoodCustomer := Customer.ID.Value;
end;
finally
Customer.Free;
end;
end;
Log('Retrieving only best customers...');
lGoodCustomers := TMVCActiveRecord.SelectRQL<TGoodCustomer>('sort(+rating)',10);
try
Assert(lGoodCustomers.Count = 2); { only rating >= 4}
for lCust in lGoodCustomers do
begin
Log(lCust.ToString);
end;
finally
lGoodCustomers.Free;
end;
Log('How many "best customers" we have?');
lHowMany := TMVCActiveRecord.Count<TGoodCustomer>;
Log(Format('We have %d best customers', [lHowMany]));
Log('How many "best customers" with rating = 5 we have?');
lHowMany := TMVCActiveRecord.Count<TGoodCustomer>('eq(rating,5)');
Log(Format('We have %d best customers with rating = 5', [lHowMany]));
Log('Retrieving only best customers...');
lGoodCustomers2 := TMVCActiveRecord.SelectRQL(TGoodCustomer, '', -1);
try
Assert(lGoodCustomers2.Count = 2); { only rating >= 4}
for lCust in lGoodCustomers2 do
begin
Log(lCust.ToString);
end;
finally
lGoodCustomers2.Free;
end;
Log('Retrieving only best customers ordered by company name...');
lGoodCustomers := TMVCActiveRecord.SelectRQL<TGoodCustomer>('sort(+CompanyName)',10);
try
Assert(lGoodCustomers.Count = 2); { only rating >= 4}
for lCust in lGoodCustomers do
begin
Log(lCust.ToString);
end;
finally
lGoodCustomers.Free;
end;
Log('Retrieving only worst customers...');
lNotAGoodCustomer := TMVCActiveRecord.SelectOneByRQL<TCustomer>('eq(rating,1)', True);
try
lThisShouldBeNil := TMVCActiveRecord.GetByPK<TGoodCustomer>(lNotAGoodCustomer.ID, False);
Assert(lThisShouldBeNil = nil);
finally
lNotAGoodCustomer.Free;
end;
lAGoodCustomer := TMVCActiveRecord.SelectOneByRQL<TCustomer>('eq(rating,5)', True);
try
lThisShouldNotBeNil := TMVCActiveRecord.GetByPK<TGoodCustomer>(lAGoodCustomer.ID, False);
try
Assert(lThisShouldNotBeNil <> nil);
Log(lThisShouldNotBeNil.ToString);
finally
lThisShouldNotBeNil.Free;
end;
finally
lAGoodCustomer.Free;
end;
Log('Promoting a customer...');
lCustomer := TBadCustomer.Create;
try
lCustomer.LoadByPK(lIDOfABadCustomer);
lCustomer.Rating := 5;
lCustomer.Store;
Assert(not lCustomer.LoadByPK(lIDOfABadCustomer)); {this customer is not "bad" anymore}
finally
lCustomer.Free;
end;
Log('Demote a customer...');
lCustomer1 := TGoodCustomer.Create;
try
lCustomer1.LoadByPK(lIDOfAGoodCustomer);
lCustomer1.Rating := 1;
lCustomer1.Store;
Assert(not lCustomer1.LoadByPK(lIDOfAGoodCustomer)); {this customer is not "good" anymore}
finally
lCustomer1.Free;
end;
end;
procedure TMainForm.btnReadOnlyFieldsClick(Sender: TObject);
var
lCustomer: TCustomerWithReadOnlyFields;
lID: Integer;
begin
Log('** CRUD test with read-only fields');
lCustomer := TCustomerWithReadOnlyFields.Create;
try
{
'Code' will not be persisted on table because defined as 'foReadOnly'
}
lCustomer.Code := '1234';
lCustomer.CompanyName := 'Google Inc.';
lCustomer.City := 'Montain View, CA';
lCustomer.Insert;
lID := lCustomer.ID;
Log('Just inserted Customer ' + lID.ToString + ' with a R/O field');
finally
lCustomer.Free;
end;
//let's check that code is empty
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithReadOnlyFields>(lID);
try
Assert(lCustomer.Code.IsEmpty);
finally
lCustomer.Free;
end;
//if underlying field is not null, it is loaded as usual
TMVCActiveRecord.CurrentConnection.ExecSQL('update customers set code = ''XYZ'' where id = ?', [lID]);
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithReadOnlyFields>(lID);
try
Assert('XYZ' = lCustomer.Code);
lCustomer.CompanyName := lCustomer.CompanyName + ' changed!';
lCustomer.Code := 'this code will not be saved';
lCustomer.Update; //do not save field "code"
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
//but being foReadOnly is not updated
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithReadOnlyFields>(lID);
try
Assert('XYZ' = lCustomer.Code);
lCustomer.Delete;
Log('Just deleted Customer ' + lID.ToString + ' with a R/O field');
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnRefreshClick(Sender: TObject);
var
lCustomer: TCustomer;
lID: Integer;
begin
Log('** Refresh test');
lCustomer := TCustomer.Create;
try
Log('Entity ' + TCustomer.ClassName + ' is mapped to table ' + lCustomer.TableName);
lCustomer.CompanyName := 'Google Inc.';
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁';
lCustomer.Insert;
Assert('Montain View, CA' = lCustomer.City);
Assert('Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁' = lCustomer.Note);
lCustomer.City := '';
lCustomer.Note := '';
Log('Refreshing the customer');
lCustomer.Refresh;
Assert('Montain View, CA' = lCustomer.City);
Assert('Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁' = lCustomer.Note);
lID := lCustomer.ID;
finally
lCustomer.Free;
end;
lCustomer := TCustomer.Create;
try
Log('Loading customer using Refresh');
lCustomer.ID := lID;
lCustomer.Refresh;
Assert('Montain View, CA' = lCustomer.City);
Assert('Μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος οὐλομένην 😁' = lCustomer.Note);
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnValidationClick(Sender: TObject);
var
lCustomer: TCustomerWithLogic;
lID: Integer;
begin
Log('** Validation test (some exceptions will be raised)');
lCustomer := TCustomerWithLogic.Create;
try
lCustomer.Code := '1234';
lCustomer.CompanyName := 'bit Time Professionals';
lCustomer.City := 'Rome';
lCustomer.Insert;
lID := lCustomer.ID;
finally
lCustomer.Free;
end;
ShowMessage('Try to update a customer with empty "CODE" (an exception will be raised)');
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithLogic>(lID);
try
Log(lCustomer.CompanyName + ' => IsLocatedInRome: ' +
BoolToStr(lCustomer.IsLocatedInRome, True));
lCustomer.Code := '';
lCustomer.Update; // raise exception
finally
lCustomer.Free;
end;
end;
procedure TMainForm.btnWithSpacesClick(Sender: TObject);
var
lCustomer: TCustomerWithSpaces;
lID: Integer;
I: Integer;
cRQL1: string;
lList: TMVCActiveRecordList;
lItem: TMVCActiveRecord;
begin
Log('** Simple CRUD (table and fields with spaces) test');
Log('There are ' + TMVCActiveRecord.Count<TCustomerWithSpaces>().ToString + ' row/s for entity ' +
TCustomerWithSpaces.ClassName);
TMVCActiveRecord.DeleteAll(TCustomerWithSpaces);
Log('Deleting all entities ' + TCustomerWithSpaces.ClassName);
for I := 1 to 100 do
begin
lCustomer := TCustomerWithSpaces.Create;
try
lID := I;
lCustomer.ID := lID;
// just for test!!
case I mod 3 of
0:
lCustomer.CompanyName := 'Google Inc.';
1:
lCustomer.CompanyName := 'bit Time Professionals';
2:
lCustomer.CompanyName := 'Walt Disney Corp.';
end;
lCustomer.City := 'Montain View, CA';
lCustomer.Note := 'Hello there!';
lCustomer.Insert;
Log('Just inserted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
end;
Log('Now there are ' + TMVCActiveRecord.Count<TCustomerWithSpaces>().ToString +
' row/s for entity ' + TCustomerWithSpaces.ClassName);
Log('Deleting using RQL...');
TMVCActiveRecord.DeleteRQL(TCustomerWithSpaces, 'lt(id,80)');
Log('Now there are ' + TMVCActiveRecord.Count<TCustomerWithSpaces>().ToString +
' row/s for entity ' + TCustomerWithSpaces.ClassName);
// gets the last inserted customer
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithSpaces>(lID);
try
Assert(not lCustomer.Code.HasValue);
lCustomer.Code.Value := '5678';
lCustomer.Note := lCustomer.Note + sLineBreak + 'Code changed to 5678';
lCustomer.Update;
Log('Just updated Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
lCustomer := TCustomerWithSpaces.Create;
try
lCustomer.LoadByPK(lID);
lCustomer.Code.Value := '9012';
lCustomer.Update;
finally
lCustomer.Free;
end;
lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithSpaces>(lID);
try
lCustomer.Delete;
Log('Just deleted Customer ' + lID.ToString);
finally
lCustomer.Free;
end;
cRQL1 := 'eq(CompanyName,"Google Inc.")';
Log('>> RQL Query (customers with spaces) - ' + cRQL1);
lList := TMVCActiveRecord.SelectRQL(TCustomerWithSpaces, cRQL1, 20);
try
Log(lList.Count.ToString + ' record/s found');
for lItem in lList do
begin
lCustomer := TCustomerWithSpaces(lItem);
Log(Format('%5s - %s (%s)', [lCustomer.Code.ValueOrDefault,
lCustomer.CompanyName.ValueOrDefault, lCustomer.City]));
end;
finally
lList.Free;
end;
end;
procedure TMainForm.btnOOPClick(Sender: TObject);
begin
Log('** OOP with ActiveRecord (person, employee, manager)');
TMVCActiveRecord.DeleteAll(TPerson);
var lPerson := TPerson.Create;
try
lPerson.FirstName := 'Reed';
lPerson.LastName := 'Richards';
lPerson.Dob := EncodeDate(1985,11,4);
lPerson.IsMale := True;
lPerson.Store;
finally
lPerson.Free;
end;
var lEmployee := TEmployee.Create;
try
lEmployee.FirstName := 'Peter';
lEmployee.LastName := 'Parker';
lEmployee.Dob := EncodeDate(1985,11,4);
lEmployee.IsMale := True;
lEmployee.Salary := 2100;
lEmployee.Store;
finally
lEmployee.Free;
end;
lEmployee := TEmployee.Create;
try
lEmployee.FirstName := 'Sue';
lEmployee.LastName := 'Storm';
lEmployee.Dob := EncodeDate(1975,10,14);
lEmployee.IsMale := False;
lEmployee.Salary := 2200;
lEmployee.Store;
finally
lEmployee.Free;
end;
var lManager := TManager.Create;
try
lManager.FirstName := 'Bruce';
lManager.LastName := 'Banner';
lManager.Dob := EncodeDate(1975,11,4);
lManager.IsMale := True;
lManager.Salary := 2800;
lManager.AnnualBonus := 5000;
lManager.Store;
finally
lManager.Free;
end;
var lPeople := TMVCActiveRecord.All<TPerson>;
try
Assert(lPeople.Count = 4);
finally
lPeople.Free;
end;
var lEmployees := TMVCActiveRecord.All<TEmployee>;
try
Assert(lEmployees.Count = 3);
finally
lEmployees.Free;
end;
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
ActiveRecordConnectionsRegistry.RemoveDefaultConnection(False);
end;
procedure TMainForm.FormShow(Sender: TObject);
var
lEngine: TRDBMSEngine;
begin
if not TEngineChoiceForm.Execute(lEngine) then
begin
Close;
Exit;
end;
case lEngine of
TRDBMSEngine.PostgreSQL:
begin
FDConnectionConfigU.CreatePostgresqlPrivateConnDef(True);
end;
TRDBMSEngine.Firebird:
begin
FDConnectionConfigU.CreateFirebirdPrivateConnDef(True);
end;
TRDBMSEngine.Interbase:
begin
FDConnectionConfigU.CreateInterbasePrivateConnDef(True);
end;
TRDBMSEngine.MySQL:
begin
FDConnectionConfigU.CreateMySQLPrivateConnDef(True);
end;
TRDBMSEngine.MariaDB:
begin
FDConnectionConfigU.CreateMySQLPrivateConnDef(True);
end;
TRDBMSEngine.SQLite:
begin
FDConnectionConfigU.CreateSqlitePrivateConnDef(True);
end;
TRDBMSEngine.MSSQLServer:
begin
FDConnectionConfigU.CreateMSSQLServerPrivateConnDef(True);
end;
else
raise Exception.Create('Unknown RDBMS');
end;
FDConnection1.Params.Clear;
FDConnection1.ConnectionDefName := FDConnectionConfigU.CON_DEF_NAME;
FDConnection1.Connected := True;
ActiveRecordConnectionsRegistry.AddDefaultConnection(FDConnection1);
Caption := Caption + ' (Curr Backend: ' + ActiveRecordConnectionsRegistry.GetCurrentBackend + ')';
{$IFDEF USE_SEQUENCES}
Caption := Caption + ' USE_SEQUENCES';
{$ELSE}
Caption := Caption + ' WITHOUT SEQUENCES';
{$ENDIF}
btnWithSpaces.Enabled := (ActiveRecordConnectionsRegistry.GetCurrentBackend = 'postgresql') or
(ActiveRecordConnectionsRegistry.GetCurrentBackend = 'firebird') or
(ActiveRecordConnectionsRegistry.GetCurrentBackend = 'interbase') or
(ActiveRecordConnectionsRegistry.GetCurrentBackend = 'sqlite');
btnJSON_XML_Types.Enabled := ActiveRecordConnectionsRegistry.GetCurrentBackend = 'postgresql';
end;
procedure TMainForm.LoadCustomers;
var
lCustomer: TCustomer;
I: Integer;
begin
TMVCActiveRecord.DeleteAll(TCustomer);
for I := 1 to 50 do
begin
lCustomer := TCustomer.Create;
try
lCustomer.CompanyName := Stuff[Random(4)] + ' ' + CompanySuffix[Random(5)];
lCustomer.Code := Random(100).ToString.PadLeft(5, '0');
lCustomer.City := Cities[Random(4)];
lCustomer.Rating := Random(5);
lCustomer.Note := Stuff[Random(4)];
lCustomer.Insert;
finally
lCustomer.Free;
end;
end;
end;
procedure TMainForm.Log(const Value: string);
begin
Memo1.Lines.Add(Value);
Memo1.Update;
end;
end.
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