Dear Developers,
the solution to my problem is not to use the dataProvider's methods, those
handle only the columns of the original layer. The layers' methods should
be used instead.
So if you would like get joined column values
use layer.pendingAllAttributesList() instead of dataProvider.attributeIndexes()
use layer.pendingFieldList() instead of dataProvider.fields()
use layer.featureAtId(...) instead of dataProvider.featureAtId(...)
The answer was found in qgisvectorfilewriter.cpp.
Best regards
On Tue, 1 Jan 2013, Siki Zoltan wrote:
Dear QGIS DEvelopoers,
I'm writing a python plugin where I would like to handle the values in a dbf
table which is joined to a shape file. I could join the table to the shape
file using VectorLayer.addJoin, but I can't find any way to get the joined
attributes of a feature. After joining the dataProvider.attributeIndexes
returns only the original columns of the shape file. The fieldNameIndex
returns -1 for all joined column names.
Any advice to get the values in joined columns in Python?
Thanks,
Zoltan
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