Question

Problem with tquery when I am inserting some information.

Asked by: rafaelrgl

I'm trying to insert this information on my database:

here is the values that is not work.

E.message =
                     Key violation.
                     Violation of UNIQUE KEY constraint 'IX_TB_USER_NOME'. Cannot insert duplicate key in object 'TB_USER'.

the active form caption is Clientes
the form name is FUser_Ficha
the active control is BitBtn2
     
that's my code:

       BD.SQLErro.InsertSQL.Clear;
       BD.SQLErro.InsertSQL.Add('insert into TB_ERRO');
       BD.SQLErro.InsertSQL.Add('(DATA, MENSAGEM, FORMNAME, FORMCAPTION, OBJETOATIVO)');
       BD.SQLErro.InsertSQL.Add(' values');
       BD.SQLErro.InsertSQL.Add('(''' + DateTimeToStr(now()) + ''',');
       BD.SQLErro.InsertSQL.Add('''' + E.Message + ''',');
       BD.SQLErro.InsertSQL.Add('''' + screen.ActiveForm.Name + ''',');
       BD.SQLErro.InsertSQL.Add('''' + Screen.ActiveForm.Caption + ''',');
       BD.SQLErro.InsertSQL.Add('''' + screen.ActiveControl.Name + ''')');
       BD.Query_Erro.Insert;
       BD.Query_Erro.ApplyUpdates;
       BD.SQLErro.InsertSQL.Clear;


That's the error message when I try to insert:

  Incorrect syntax near by 'IX_TB_USER_NOME'

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Asked On
2006-08-12 at 13:09:14ID21952414
Tags

key

,

tquery

,

unique

Topic

Delphi Programming

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: ciulyPosted on 2006-08-12 at 13:12:28ID: 17303155

as sun4day suggested in the other question, you are trying to insert a username that already is inserted.
as a resolution, you can ignore the error and let the user know that the value alreadz exists, or, you can catch the error and in the exception part update the row with the new values. it depends on youir application logic

 

by: ciulyPosted on 2006-08-12 at 13:15:29ID: 17303163

or, don't make the username a unique constraint. it is logically incorrect.
one give username can have more than one error ;)

 

by: rafaelrglPosted on 2006-08-12 at 13:15:43ID: 17303164

that's not the same table, that table is not indexed or does not have unique field. What I do on that table is when some error happening I insert it on that table TB_ERROR.

 

by: geobulPosted on 2006-08-12 at 13:16:53ID: 17303167

Hi,

Try the following change:

change
BD.SQLErro.InsertSQL.Add('''' + E.Message + ''',');

to:
BD.SQLErro.InsertSQL.Add(QuotedStr(E.Message) + ',');

The reason is that there are ' characters in the E.Message text.

Regards, Geo

 

by: rafaelrglPosted on 2006-08-12 at 13:19:04ID: 17303171

that's other question.
that code is type on object tapplicationevents1 on event onexception.

here:

procedure TFPrinc.ApplicationEvents1Exception(Sender: TObject;
  E: Exception);
begin
   Historico.Lines.Add('/////////ERROR//////////');
   Historico.Lines.Add(E.Message);
   Historico.Lines.Add(Screen.ActiveForm.Caption);
   historico.Lines.Add(screen.ActiveForm.Name);
   historico.Lines.Add(screen.ActiveControl.Name);
   Historico.Lines.Add('////////////////////////');
   BD.SQLErro.InsertSQL.Clear;
   BD.SQLErro.InsertSQL.Add('insert into TB_ERRO');
   BD.SQLErro.InsertSQL.Add('(DATA, MENSAGEM, FORMNAME, FORMCAPTION, OBJETOATIVO)');
   BD.SQLErro.InsertSQL.Add(' values');
   BD.SQLErro.InsertSQL.Add('(''' + DateTimeToStr(now()) + ''',');
   BD.SQLErro.InsertSQL.Add('''' + E.Message + ''',');
   BD.SQLErro.InsertSQL.Add('''' + screen.ActiveForm.Name + ''',');
   BD.SQLErro.InsertSQL.Add('''' + Screen.ActiveForm.Caption + ''',');
   BD.SQLErro.InsertSQL.Add('''' + screen.ActiveControl.Name + ''')');
   BD.Query_Erro.Insert;
   BD.Query_Erro.ApplyUpdates;
   BD.SQLErro.InsertSQL.Clear;
end;

 

by: ciulyPosted on 2006-08-12 at 13:21:16ID: 17303177

one thing: depending one the DB, strings should be enclosed eitehr in double quotes or in single quotes. usually it's doublequotes.

 

by: rafaelrglPosted on 2006-08-12 at 13:23:46ID: 17303183

I try this like geobul sad and works good.

BD.SQLErro.InsertSQL.Add(QuotedStr(E.Message) + ',');


thank you all

20120131-EE-VQP-002

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