[OGR provider] Avoid 'database locked' issues when editing several la…

…yers of the same GeoPackage (fixes #17034)

src/providers/ogr/qgsogrprovider.cpp

@@ -1671,6 +1671,7 @@ bool QgsOgrProvider::changeAttributeValues( const QgsChangedAttributesMap &attr_
       pushError( tr( "Feature %1 for attribute update not found." ).arg( fid ) );
       continue;
     }
+    OGR_L_ResetReading( ogrLayer ); // needed for SQLite-based to clear iterator
 
     QgsLocaleNumC l;
 
@@ -1811,6 +1812,7 @@ bool QgsOgrProvider::changeGeometryValues( const QgsGeometryMap &geometry_map )
       pushError( tr( "OGR error changing geometry: feature %1 not found" ).arg( it.key() ) );
       continue;
     }
+    OGR_L_ResetReading( ogrLayer ); // needed for SQLite-based to clear iterator
 
     OGRGeometryH newGeometry = nullptr;
     QByteArray wkb = it->exportToWkb();

tests/src/python/test_provider_ogr_gpkg.py

@@ -451,6 +451,68 @@ def testSimulatedDBManagerImport(self):
         self.assertEqual(f['f1'], 3)
         features = None
 
+    def testGeopackageTwoLayerEdition(self):
+        ''' test https://issues.qgis.org/issues/17034 '''
+        tmpfile = os.path.join(self.basetestpath, 'testGeopackageTwoLayerEdition.gpkg')
+        ds = ogr.GetDriverByName('GPKG').CreateDataSource(tmpfile)
+        lyr = ds.CreateLayer('layer1', geom_type=ogr.wkbPoint)
+        lyr.CreateField(ogr.FieldDefn('attr', ogr.OFTInteger))
+        f = ogr.Feature(lyr.GetLayerDefn())
+        f.SetGeometry(ogr.CreateGeometryFromWkt('POINT(0 0)'))
+        lyr.CreateFeature(f)
+        f = None
+        lyr = ds.CreateLayer('layer2', geom_type=ogr.wkbPoint)
+        lyr.CreateField(ogr.FieldDefn('attr', ogr.OFTInteger))
+        f = ogr.Feature(lyr.GetLayerDefn())
+        f.SetGeometry(ogr.CreateGeometryFromWkt('POINT(1 1)'))
+        lyr.CreateFeature(f)
+        f = None
+        ds = None
+
+        vl1 = QgsVectorLayer(u'{}'.format(tmpfile) + "|layername=layer1", u'layer1', u'ogr')
+        vl2 = QgsVectorLayer(u'{}'.format(tmpfile) + "|layername=layer2", u'layer2', u'ogr')
+
+        # Edit vl1, vl2 multiple times
+        self.assertTrue(vl1.startEditing())
+        self.assertTrue(vl2.startEditing())
+        self.assertTrue(vl1.changeGeometry(1, QgsGeometry.fromWkt('Point (2 2)')))
+        self.assertTrue(vl2.changeGeometry(1, QgsGeometry.fromWkt('Point (3 3)')))
+        self.assertTrue(vl1.commitChanges())
+        self.assertTrue(vl2.commitChanges())
+
+        self.assertTrue(vl1.startEditing())
+        self.assertTrue(vl2.startEditing())
+        self.assertTrue(vl1.changeAttributeValue(1, 1, 100))
+        self.assertTrue(vl2.changeAttributeValue(1, 1, 101))
+        self.assertTrue(vl1.commitChanges())
+        self.assertTrue(vl2.commitChanges())
+
+        self.assertTrue(vl1.startEditing())
+        self.assertTrue(vl2.startEditing())
+        self.assertTrue(vl1.changeGeometry(1, QgsGeometry.fromWkt('Point (4 4)')))
+        self.assertTrue(vl2.changeGeometry(1, QgsGeometry.fromWkt('Point (5 5)')))
+        self.assertTrue(vl1.commitChanges())
+        self.assertTrue(vl2.commitChanges())
+
+        vl1 = None
+        vl2 = None
+
+        # Check everything is as expected after re-opening
+        vl1 = QgsVectorLayer(u'{}'.format(tmpfile) + "|layername=layer1", u'layer1', u'ogr')
+        vl2 = QgsVectorLayer(u'{}'.format(tmpfile) + "|layername=layer2", u'layer2', u'ogr')
+
+        got = [feat for feat in vl1.getFeatures()][0]
+        got_geom = got.geometry()
+        self.assertEqual(got['attr'], 100)
+        reference = QgsGeometry.fromWkt('Point (4 4)')
+        self.assertEqual(got_geom.exportToWkb(), reference.exportToWkb(), 'Expected {}, got {}'.format(reference.exportToWkt(), got_geom.exportToWkt()))
+
+        got = [feat for feat in vl2.getFeatures()][0]
+        got_geom = got.geometry()
+        self.assertEqual(got['attr'], 101)
+        reference = QgsGeometry.fromWkt('Point (5 5)')
+        self.assertEqual(got_geom.exportToWkb(), reference.exportToWkb(), 'Expected {}, got {}'.format(reference.exportToWkt(), got_geom.exportToWkt()))
+
 
 if __name__ == '__main__':
     unittest.main()