[processing] Fix broken Aggregate algorithm

nyalldawson · nyalldawson · commit ff6ea3368637 · 2018-03-20T08:06:38.000+11:00
Fixes #18349
diff --git a/python/plugins/processing/algs/qgis/ui/AggregatesPanel.py b/python/plugins/processing/algs/qgis/ui/AggregatesPanel.py
@@ -179,6 +179,6 @@ def configure(self):
 
 class AggregatesWidgetWrapper(FieldsMappingWidgetWrapper):
 
-    def createWidget(self, parentLayerParameterName='INPUT'):
+    def createPanel(self, parentLayerParameterName='INPUT'):
         self._parentLayerParameter = parentLayerParameterName
         return AggregatesPanel()
diff --git a/python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py b/python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py
@@ -479,8 +479,11 @@ def __init__(self, *args, **kwargs):
         super(FieldsMappingWidgetWrapper, self).__init__(*args, **kwargs)
         self._layer = None
 
+    def createPanel(self):
+        return FieldsMappingPanel()
+
     def createWidget(self):
-        self.panel = FieldsMappingPanel()
+        self.panel = self.createPanel()
         self.panel.dialogType = self.dialogType
 
         if self.dialogType == DIALOG_MODELER:
