Hi Alexander, This seems to be related to the copy constructor of QgsExpression not working properly. Please file a bug for this.
It's a quite complex topic, because the original expression string cannot just be used because of dynamically created expressions. On the other hand the dynamic method fails for certain types (longlong I think). And personally I think that QgsExpressions could be implicitly shared, but I've heard other opinions on this topic. Cheers, Matthias On 23.07.2014 16:16, Alexander Bruy wrote: > Hi all, > > seems expression filtering of features does not works when used from Python. > Here is my test code for Python console: > > layer = iface.mapCanvas().currentLayer() > expr = '"dt" = \'2014-07-05\' AND abs("y" - 3.0) <= 0.000001' > request = QgsFeatureRequest().setFilterExpression(expr) > for f in layer.getFeatures(request): > print 'found' > > This code find no matches in attached shapefile when executed from Python > console, but when I try to use same expression in "Select by Expression" tool > it > selects one feature. > > Maybe I miss something? Should I open a ticket? > > > > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer