[PyQt] QSqlQueryModel write subclass

[Linos]

David thanks for your reply i get this to work yesterday, the problem was that i was not implementing
rowcount() so the new line was painted in the view but it did not have real index so data() and setdata()
could not use it, i am today working in a Qsqlquerymodel subclass with a buffer of rows to insert it all in a
final transaction if the model have dirty property true.

Best Regards,
Miguel Angel.

David Boddie escribió:
> On Wednesday 17 October 2007 12:14:52 +0200, Linos wrote:
> 
>> I am goin crazy with this problem, i have tested with qsqltablemodel
>> subclassing and it works ok if a dont write the insertRows method in the
>> subclass:
>>
>> (model)
>> class SkudaSqlTableModel(QSqlTableModel):
>>     def __init__(self, dbcursor=None):
>>         super(SkudaSqlTableModel, self).__init__()
>>
>>
>> (QDialog)
>> def addRecord(self):
>>         row = self.querymodel.rowCount()
>>         self.querymodel.insertRow(row)
>>
>>
>> this works ok and gives me an new row with an '*' in the vertical header
>> and i can edit the line but if i do this:
>>
>> (model)
>> class SkudaSqlTableModel(QSqlTableModel):
>>     def __init__(self, dbcursor=None):
>>         super(SkudaSqlTableModel, self).__init__()
>>
>>     def insertRows(self, position, rows=1 , index=QModelIndex()):
>>         self.beginInsertRows(QModelIndex(), position, position + rows - 1)
>>         self.endInsertRows()
>>         return True
> 
> Normally, when you reimplement insertRows() you would do something between
> calling beginInsertRows() and endInsertRows(). Not being familiar with the
> internals of QSqlTableModel, I'm not sure what should be done.
> 
>> (QDialog)
>> def addRecord(self):
>>         row = self.querymodel.rowCount()
>>         self.querymodel.insertRow(row)
>>
>> i get a new line with the next number in the vertical header (not *) and i
>> cant edit the line. So i suppose i have any problem in my insertRows method
>> but i have read the QSqlTableModel source code insertRows method, i paste
>> here the strategy OnRowchange because is what i am using.
> 
> OK, so do you basically want to fine-tune the behaviour of the table model
> or are you trying to achieve something else by subclassing QSqlTableModel?
> 
> [...]
> 
>> I cant find any other action to implement in my method apart from
>> beginInsertRows and endInsertRows, i am not using the insertIndex number (i
>> use rowCount()), not clearEditBuffer() because i have no buffer to clear in
>> this test and primeInsert is a signal no connected to anything so i dont
>> emit it, anyway i have tried using exactly the same (all of them) in my
>> method with exactly the same problem, can anyone please open my closed mind
>> with this annoying problem?
> 
> I suppose that the lines
> 
>   d->insertIndex = row;
>   d->clearEditBuffer();
> 
> may have some side effects, but it's difficult to see what those could be
> without more detailed study. Plus, there's nothing you can do to access
> the internals in such a way.
> 
>> i will use qsqltablemodel subclass with 
>> setQuery (inherited from QSqlQuery) to do joins and other stuff if i cant
>> fix this (but this is not recommended in documentation).
> 
> I imagine that using setQuery() might interfere with the normal operation
> of the model if you're not careful.
> 
> David
> 
> 
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.com
> http://www.riverbankcomputing.com/mailman/listinfo/pyqt