Dear devs,
my situation is as follows:
I am working on some Python code. I have a non-spatial layer in the
project created from a PostgreSQL table.
For this layer I can (via Python):
1) create a new feature, manipulate its attribute values and add it to
the layer
2) access an existing feature and its attribute values by this code:
feat = QgsFeature()
ok = layer.featureAtId(fid, feat, False, True)
3) open the feature form and have the user manipulate the attribute
values of either 1) or 2)
However I could not find a way to access an existing feature and
manipulate its attribute values so that the changed values are written
back to the layer just like the feature form does.
I understand that the feature is not part of the layer as soon as it is
accessed by the code given above. Is there a way to replace a feature in
a layer or change its attribute values other than via feature form?
To delete the original feature and add a new feature with changed values
afterwards is not a solution because there are foreign keys defined on
the feature's id. So deletion would not be allowed (foreign-key option
RESTRICT) or related datasets in other tables would be deleted, too
(foreign-key option CASCADE). So this is not viable.
any hints are welcome
regards
Bernhard
________ Information from NOD32 ________
This message was checked by NOD32 Antivirus System for Linux Mail Server.
http://www.nod32.com
_______________________________________________
Qgis-developer mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-developer
