Re: [QGIS-Developer] How to retrieve all "virtual fields" of a layer?
Hi Stefan for attr_idx in range(l.fields().count()): if l.fields().fieldOrigin(attr_idx) == QgsFields.OriginExpression: print(l.fields()[attr_idx].name()) Cheers Matthias On 06/01/2017 02:53 PM, Stefan Keller wrote: > Thanks Etienne, > > But I'm looking for a list of virtual fields (not virtual C++ > functions) from a PyQGIS accessor as they can be defined by the user > in the "Field Calculator". > > :Stefan > > 2017-06-01 3:23 GMT+02:00 Etienne Trimaille : > > Hi, > > > > Both layer.fields() or layer.pendingFields() work for me. I got my virtual > > field. > > > > 2017-06-01 3:34 GMT+08:00 Stefan Keller : > >> > >> Hi, > >> > >> In a Python plugin I want to retrieve information about all > >> attributes/fields of a layer > >> In the cookbook [1] it's described how to retrieve thems > >> for field in layer.pendingFields(): > >> print field.name(), field.typeName() > >> > >> => But how do I get all "virtual fields" programmatically? > >> > >> :Stefan > >> > >> [1] > >> http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#retrieving-information-about-attributes > >> ___ > >> QGIS-Developer mailing list > >> QGIS-Developer@lists.osgeo.org > >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] How to retrieve all "virtual fields" of a layer?
Thanks Etienne, But I'm looking for a list of virtual fields (not virtual C++ functions) from a PyQGIS accessor as they can be defined by the user in the "Field Calculator". :Stefan 2017-06-01 3:23 GMT+02:00 Etienne Trimaille : > Hi, > > Both layer.fields() or layer.pendingFields() work for me. I got my virtual > field. > > 2017-06-01 3:34 GMT+08:00 Stefan Keller : >> >> Hi, >> >> In a Python plugin I want to retrieve information about all >> attributes/fields of a layer >> In the cookbook [1] it's described how to retrieve thems >> for field in layer.pendingFields(): >> print field.name(), field.typeName() >> >> => But how do I get all "virtual fields" programmatically? >> >> :Stefan >> >> [1] >> http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#retrieving-information-about-attributes >> ___ >> QGIS-Developer mailing list >> QGIS-Developer@lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] How to retrieve all "virtual fields" of a layer?
Hi, Both layer.fields() or layer.pendingFields() work for me. I got my virtual field. 2017-06-01 3:34 GMT+08:00 Stefan Keller : > Hi, > > In a Python plugin I want to retrieve information about all > attributes/fields of a layer > In the cookbook [1] it's described how to retrieve thems > for field in layer.pendingFields(): > print field.name(), field.typeName() > > => But how do I get all "virtual fields" programmatically? > > :Stefan > > [1] http://docs.qgis.org/testing/en/docs/pyqgis_developer_ > cookbook/vector.html#retrieving-information-about-attributes > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
[QGIS-Developer] How to retrieve all "virtual fields" of a layer?
Hi, In a Python plugin I want to retrieve information about all attributes/fields of a layer In the cookbook [1] it's described how to retrieve thems for field in layer.pendingFields(): print field.name(), field.typeName() => But how do I get all "virtual fields" programmatically? :Stefan [1] http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#retrieving-information-about-attributes ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
