[Lazarus] Master-Detail in sqldb broken?

[Julio César Gázquez]

Hi all.

I have a master detail form, I'm using SQLDB and running a current 
snapshot (Lazarus-0.9.29 rev 28828).

Retrieving data works Ok. Saving changes doesn't. Googling I found old 
comments in the mailing list saying primary keys must be integers. Is 
yet that the case? If it isn't, component declaration and relevant code 
follows.

Another issue, when the master have more than 1 record, if I edit the 
detail, then move around in the master, detail changes are lost. IIRC 
this works fine in dbExpress. It is a bug or a design limitation of sqldb?

   object PQConnection1: TPQConnection
     Connected = False
     LoginPrompt = False
     DatabaseName = 'contabilidad'
     KeepConnection = False
     Password = 'postgres'
     Transaction = SQLTransaction1
     UserName = 'postgres'
     HostName = '10.0.2.2'
     left = 444
     top = 12
   end
   object QueryMaster: TSQLQuery
     IndexName = 'DEFAULT_ORDER'
     Database = PQConnection1
     Transaction = SQLTransaction1
     ReadOnly = False
     SQL.Strings = (
       'SELECT *'
       'FROM asientos'
       'WHERE numejercicio = 1'
       ' AND numasiento = 13'
     )
     Params = <>
     left = 445
     top = 63
   end
   object QueryDetail: TSQLQuery
     IndexName = 'DEFAULT_ORDER'
     Database = PQConnection1
     Transaction = SQLTransaction1
     ReadOnly = False
     SQL.Strings = (
       'SELECT *'
       'FROM imputacionesasientos'
       'WHERE numejercicio = :numejercicio'
       ' AND numasiento = :numasiento'
       'ORDER BY numimputacion'
     )
     Params = <
       item
         DataType = ftUnknown
         Name = 'numejercicio'
         ParamType = ptUnknown
       end
       item
         DataType = ftUnknown
         Name = 'numasiento'
         ParamType = ptUnknown
       end>
     DataSource = SourceMaster
     left = 444
     top = 128
   end
   object SourceMaster: TDatasource
     DataSet = QueryMaster
     left = 376
     top = 63
   end
   object SourceDetail: TDatasource
     DataSet = QueryDetail
     left = 376
     top = 128
   end
   object SQLTransaction1: TSQLTransaction
     Active = False
     Action = caNone
     Database = PQConnection1
     left = 376
     top = 12
   end


procedure TForm1.FormCreate(Sender: TObject);
begin
   PQConnection1.Connected:=True;
   QueryMaster.Open;
   // Parameter property settings seems also broken in the best 
dbExpress style!
   QueryDetail.Params.ParamByName('numejercicio').DataType:=ftSmallInt;
   QueryDetail.Params.ParamByName('numasiento').DataType:=ftLargeInt;
   QueryDetail.Open;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
   if QueryMaster.State<>dsBrowse then
      QueryMaster.Post;
   if QueryDetail.State<>dsBrowse then
      QueryDetail.Post;

   try
     QueryMaster.ApplyUpdates;
     QueryDetail.ApplyUpdates;
     SQLTransaction1.Commit;
   except
     SQLTransaction1.Rollback;
     raise;
   end;
end;

-- 
Ing. Julio César Gázquez
Mutual de Empleados del Banco
Mitre 923 1º Piso - (S2000COS) Rosario
Tel-Fax: 0341-4265010 411 0533