Hi dev and users I don't understand how to append an existing gpkg layer with pyqgis. I've tried many QgsVectorFileWriter options
self.options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteLayer reset final layer And self.options.EditionCapability = QgsVectorFileWriter.CanAppendToExistingLayer does not change anything So what's the good way to do this ? This is my code (I'm iterating over several other data sources) self.options = QgsVectorFileWriter.SaveVectorOptions() self.options.driverName = 'GPKG' self.options.onlySelectedFeatures = True self.options.layerName = 'parcelles' for dir in dirs: print(dir) if os.path.isdir(dir): db_GPKG = os.path.join(dir, 'MAEC2023.gpkg') if os.path.exists(db_GPKG): gpkg_layer = db_GPKG + "|layername=parcelles" RPG_layer = QgsVectorLayer(gpkg_layer, "RPG", "ogr") expr = (' "fk_mesure" is not null ') #expr = ('"fk_mesure" = \'{}\'').format('MAEC Papillons') RPG_layer.selectByExpression(expr) selected_feature = RPG_layer.selectedFeatures() print(len(selected_feature)) if os.path.exists(self.db_GPKG): # if the ouput file already exist self.options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteLayer #self.options.actionOnExistingFile = QgsVectorFileWriter.AppendToLayerNoNewFields #self.options.actionOnExistingFile = QgsVectorFileWriter.AppendToLayerAddFields self.options.EditionCapability = QgsVectorFileWriter.CanAppendToExistingLayer else: self.options.actionOnExistingFile = QgsVectorFileWriter.CreateOrOverwriteFile write_result, error_message = QgsVectorFileWriter.writeAsVectorFormatV2(RPG_layer, self.db_GPKG , self.context, self.options) Thanks [cid:image001.jpg@01D972AD.7D49D680] Sylvain PIERRE Chef de projet système d'information Direction des Systèmes d'Information et du Développement Numérique Service Projets et Ingénierie Numérique Collectivité européenne d'Alsace Tél : 03 88 76 68 88 sylvain.pie...@alsace.eu<mailto:sylvain.pie...@alsace.eu> www.alsace.eu<http://www.alsace.eu> [facebook]<http://www.facebook.com/toutelalsace> [twitter] <http://www.twitter.com/toutelalsace> [insta] <http://www.instagram.com/toutelalsace>
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