QCcompleter , colum probelm

[deepinlife]

guys i want to make a lineEdit complete its field from a QTableModel colum , the problem that it completes from other colum not the one i choose

QCompleter* cc = new QCompleter( this ) ;
	cc->setModel( model );
	cc->setCompletionColumn(2);
	cc->setCompletionMode(QCompleter::PopupCompletion);
	cc->setCaseSensitivity( Qt::CaseInsensitive );
	lineEdit->setCompleter(cc);

QCompleter* cc = new QCompleter( this ) ;
	cc->setModel( model );
	cc->setCompletionColumn(2);
	cc->setCompletionMode(QCompleter::PopupCompletion);
	cc->setCaseSensitivity( Qt::CaseInsensitive );
	lineEdit->setCompleter(cc);

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shouldn't it display colum 2 in the model ?
it is displaying the colum 0 , the primary key!