[Qgis-developer] QgsFeatureRerquest filters are mutually exclusive? why?

[Luigi Pirelli]

filter combination works only if setting attribute filter with

http://qgis.org/api/classQgsVectorLayer.html#a6ad141dfa9a0243c0c1c9fa422379e40

a snippet that works is

# iteration getting only selected features
rect = QgsRectangle(  1223070.695,  2293653.357 , 9046974.211,  4184988.662)

request =  QgsFeatureRequest()
request.setSubsetOfAttributes([0, 2])
myVector.setSubsetString('"AREA_MI" > 1000') <--------------------
request.setFilterRect( rect )

#request.setFlags(QgsFeatureRequest.ExactIntersect or
QgsFeatureRequest.SubsetOfAttributes)

for index, feature in enumerate( myVector.getFeatures( request ) ):
    print "The record %d has ID %d" % ( index, feature.id() )

regards Luigi Pirelli


On 20 December 2014 at 11:57, Luigi Pirelli <luipir at gmail.com> wrote:
> Hi,
>
> I realised that some filter in QgsFeatureRequest are mutually exclusive
>
> the following gist on alaska.shp (in alaska crs)
> https://gist.github.com/luipir/fcbc318304944962dfec#file-gistfile1-py
>
> return 283 Elements
>
> but uncomment spatial filter request.setFilterRect( rect ) return only
> 10 records
>
> seems that the mutual exclusivity is coded here
> http://qgis.org/api/qgsvectorlayerfeatureiterator_8cpp_source.html#l00126
>
> and mFilter in QgsFeatureRequest is NOT managed in OR during setting
> in http://qgis.org/api/qgsfeaturerequest_8cpp_source.html
>
> it's a bug or a feature or not implemented or my fault in using filtering?
>
> regards, Luigi Pirelli