Fix v.external default configuration and handling

Author: Médéric RIBREUX

python/plugins/processing/algs/grass7/Grass7Algorithm.py

@@ -430,7 +430,7 @@ def processInputs(self, parameters, context):
                             paramName, parameters, context)
                     else:
                         self.loadVectorLayerFromParameter(
-                            paramName, parameters, context)
+                            paramName, parameters, context, None)
             # For multiple inputs, process each layer
             elif isinstance(param, QgsProcessingParameterMultipleLayers):
                 layers = self.parameterAsLayerList(parameters, paramName, context)
@@ -441,7 +441,7 @@ def processInputs(self, parameters, context):
                         self.loadRasterLayer(layerName, layer)
                     # Add a vector layer
                     elif layer.type() == QgsMapLayer.VectorLayer:
-                        self.loadVectorLayer(layerName, layer)
+                        self.loadVectorLayer(layerName, layer, None)
 
         self.postInputs()
 

python/plugins/processing/algs/grass7/Grass7AlgorithmProvider.py

@@ -70,11 +70,13 @@ def load(self):
             self.tr('Location of GRASS docs'),
             Grass7Utils.grassHelpPath()))
         # Add a setting for using v.external instead of v.in.ogr
+        # But set it to False by default because some algorithms
+        # can't be used with external data (need a solid v.in.ogr).
         ProcessingConfig.addSetting(Setting(
             self.name(),
             Grass7Utils.GRASS_USE_VEXTERNAL,
             self.tr('For vector layers, use v.external (faster) instead of v.in.ogr'),
-            True))
+            False))
         ProcessingConfig.readSettings()
         self.refreshAlgorithms()
         return True