no submit data with editable QComboBox

[Mr. Kibu]

Hello!

I have got a problem with a editable combobox that is mapped with a QSqlRelationalTableModel.

First is create the model and set the relation:

mModelVoucherPos = new QSqlRelationalTableModel(this, ConnProjectDB::db());
mModelVoucherPos->setTable("VoucherPos");
mModelVoucherPos->setRelation(mModelVoucherPos->fieldIndex("CostCenterKey"), QSqlRelation("vCostCenter","CcKey","text"));

Than I map the data with the QComboBox:

mMapVoucherPos=new QDataWidgetMapper(this);
mMapVoucherPos->setModel(mModelVoucherPos);
mMapVoucherPos->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
mMapVoucherPos->setItemDelegate(new QSqlRelationalDelegate(mMapVoucherPos));

mMapVoucherPos->addMapping(ui->cbCostCenter,8);

With "mMapVoucherPos->submit();" I submit the data to the QSqlite-Database.

It works very well if the combobox is not editable. If I set the combobox editable and open the dialog, the right data is shown in the combobox, but if I submit the column is empty. If I choose any data in the popup-list of the combobox and submit the data the right data is in the database.

So:
If I only open the dialog and close it (including "submit") the data of the combobox is deleted in the database. If I open the dialog and edit the combobox, the right data is in the database.

Has anybody an idea why I loose the data of the editable combobox?

Thank you!

Franz

[alex_malyu]

I am not sure,
but I guess editable combobox does not update model until editingFinished signal is emmited for
QLineEdit * QComboBox::lineEdit ()

[Mr. Kibu]

Ok, but if I use the editable combobox without a relation (e.g. a stringlist), than everything works too.

Is it possible that there is a additional thing I have to regard using relations?

[alex_malyu]

@Mr.-Kibu said:

QDataWidgetMapper

I do not have experience with QDataWidgetMapper,
and not sure I understand the logic correctly but it seems you may try to map QLineEdit provided by combobox instead of combobox itself. According to what I read in documentation this may be a solution.

[Mr. Kibu]

I can map like this:

mMapVoucherPos->addMapping(ui->cbCostCenter->lineEdit,8);

and the combobox in the dialog shows the right value, but I cannot submit to the model!