fix #3661

git-svn-id: http://svn.osgeo.org/qgis/trunk@15610 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/plugins/fTools/tools/doGeometry.py

@@ -354,8 +354,9 @@ def multi_to_single( self ):
     allAttrs = vprovider.attributeIndexes()
     vprovider.select( allAttrs )
     fields = vprovider.fields()
+    geomType = self.multiToSingleGeom(vprovider.geometryType())
     writer = QgsVectorFileWriter( self.myName, self.myEncoding,
-    fields, vprovider.geometryType()-3, vprovider.crs() )
+        fields, geomType, vprovider.crs() )
     inFeat = QgsFeature()
     outFeat = QgsFeature()
     inGeom = QgsGeometry()
@@ -901,6 +902,22 @@ def singleToMultiGeom(self, wkbType):
       except Exception, err:
           print str(err)
 
+  def multiToSingleGeom(self, wkbType):
+      try:
+          if wkbType in (QGis.WKBPoint, QGis.WKBMultiPoint,
+                         QGis.WKBPoint25D, QGis.WKBMultiPoint25D):
+              return QGis.WKBPoint
+          elif wkbType in (QGis.WKBLineString, QGis.WKBMultiLineString,
+                           QGis.WKBMultiLineString25D, QGis.WKBLineString25D):
+              return QGis.WKBLineString
+          elif wkbType in (QGis.WKBPolygon, QGis.WKBMultiPolygon,
+                           QGis.WKBMultiPolygon25D, QGis.WKBPolygon25D):
+              return QGis.WKBPolygon
+          else:
+              return QGis.WKBUnknown
+      except Exception, err:
+          print str(err)
+
   def extractAsSingle( self, geom ):
     multi_geom = QgsGeometry()
     temp_geom = []