[Qgis-user] How to define generic VectorFileWriter

[Nyall Dawson]

On Fri, 21 Dec 2018 at 19:03, Reginald <Reginald.Carlier at ingelmunster.be> wrote:
>
> Hi,
>
> I'm trying to implement a way to copy the geometry of selected parcels to an
> editable layer in a qgs project.
> I'm using QGIS 3.4.2.
>
> My code looks like this:
>
> from qgis.PyQt.QtCore import *
> from qgis.core import WKB

This should be

from qgis.core import QgsWkbTypes

See https://qgis.org/pyqgis/master/core/QgsWkbTypes.html

Nyall

>
> perceellayer=None
> editlayer=None
> layers = [layer for layer in QgsProject.instance().mapLayers().values()]
> for lyr in layers:
>     if lyr.name() == "Adpf1836007":
>         perceellayer = lyr
>     if lyr.type() == QgsMapLayer.VectorLayer:
>         cap = lyr.dataProvider().capabilities()
>         if cap & QgsVectorDataProvider.AddFeatures:
>             editlayer = lyr
> percelen = []
> features = perceellayer.selectedFeatures()
> geom = None
> for f in features:
>     if geom == None:
>         geom = f.geometry()
>     else:
>         geom = geom.combine(f.geometry())
>
> velden = editlayer.fields()
> fpad = editlayer.dataProvider().dataSourceUri()
> feat = QgsFeature(velden)
> feat.setGeometry(geom)
> fout = QgsVectorFileWriter.writeAsVectorFormat(editlayer, fpad, "31370",
> WKB.Polygon, "ESRI Shapefile")
> if fout == QgsVectorFileWriter.NoError:
>     print("succes")
> print("done")
>
> In this example I try to write to a shapefile, but it fails complaining it
> can not import WKB. I would like to write to any kind of Vectorfile
> depending of the vectorfile that was set writeable. Any ideas on how to do
> this? The cookbook is kind of short concerning writing features.
>
> Regards,
>
>
>
> --
> Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-User-f4125267.html
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