Inserting row into QSqlQueryModel trough QDataWidgetMapper



  • Hello,

    I have subclassed a QSqlQueryModel and implemented the setData() and flags() function.
    I also implemented the insertRow() function to insert a blanc row in the database (append).
    After that i created a widget that uses the model and a qdatawidgetmapper. With this combination it is possible to edit EXISTING rows.

    Now the problems start when i want to insert a new row. In this case i must create the new row at the start of the widget so i can set the mapper to it. But if the user happens to CANCEL the dialog then i have a blanc row in my database. That can't be right.

    Now my guess is that a standard tablemodel will first cache the insert and submits the change to the database when "submit" on the datamapper is called.

    What is the best way to deal with this. I must use the qsqlquerymodel beceause my database has a lot of tables that cant be mapped with a standard relationaltablemodel. How should i insert and delete rows and prevent (caching?) having bogus data in the database.


Log in to reply
 

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.