How To Change data (setData) in EditableModel child on QSqlQueryModel ?

[SGaist]

Hi,

To add to @mrjj, the implementation of setFirstName looks suspicious. You seem to want to use positional placeholders while your query isn't written for that.

[Taz742]

@mrjj Yes, it saves new data in database but form shows old numbers

[mrjj]

@Taz742

Ok, maybe you need to use the
http://doc.qt.io/qt-5/qabstractitemmodel.html#rowsAboutToBeRemoved
or some other function that fits the action you do to the data.

Currently, you just change the database behind its back
so I guess what is wrong is that it cannot know that. :)

[Taz742]

@mrjj
It does not have setQuery();

[SGaist]

QAbstractItemModel is the lowest base class of QSqlQueryModel.

[Taz742]

@SGaist
you are right.

So, I think it would be better TableWidget. I fill in the data manually.

What do you think? @SGaist , @mrjj

[Taz742]

I solved my problem.

QSqlQuery query;

query.prepare("SELECT * FROM VALUTA");

query.exec();

ui->tableWidget->setColumnCount(3);
ui->tableWidget->setRowCount(8);
ui->tableWidget->setHorizontalHeaderLabels(QStringList() << "იდ" << "სახელი" << "კურსი");
ui->tableWidget->verticalHeader()->hide();

int i = 0;

while(query.next()){
    int j = 0;
    while(j < 3){
        QTableWidgetItem* itm = new QTableWidgetItem(query.value(j).toString());
        ui->tableWidget->setItem(i,j,itm);

        if(j == 0){
            itm->setFlags(itm->flags() ^ Qt::ItemIsEditable); // **DISABLE EDIT**
        }

        j++;
    }
    i++;
}

But the concrete problem has not been reached.
I write as resolved?

[mrjj]

@Taz742
If you still have the view issue then leave it open :)

[Taz742]

@mrjj
Yes, I will leave open. I think This topical theme.

[RajeeshRaveendran]

Hi,

Did you forget to emit dataChanged() signal after value updated?
This signal is must if you need to reflect the changes on UI.

[Taz742]

Hi. @RajeeshRaveendran
YES, I've seen this signal.
But UI->, update, when it changes, model-> setData doing nothing.

[mrjj]

@Taz742
Did u try to call
emit dataChanged()
in setData ?

[RajeeshRaveendran]

Hi Taz,

I did not get you. Let me explain a little more. Simply you should modify your model class to

bool EditAbleModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
{
/// update the data to database/internal data storage
emit dataChanged(); /// So that UI (QML) know the change occurred in background and query the new value by calling data() method to update UI.
}

QVariant EditAbleModel::data(const QModelIndex &index, int role)
{
/// return your data as per custom db.
}

[Taz742]

@RajeeshRaveendran
Now I'm busy with something else and definitely I'll see into your answer.
thank for reply, and sorry english :))