Remove hack for MPTT default values, left/right must have a default to 0

review315001

trytond/model/modelsql.py

@@ -312,14 +312,6 @@ class ModelSQL(ModelStorage):
                     values[field]))
             else:
                 upd_todo.append(field)
-            if (isinstance(column, fields.Many2One)
-                    and column.model_name == self._name
-                    and column.left and column.right
-                    and set((column.left, column.right)).isdisjoint(values)):
-                upd0 += ', "%s", "%s"' % (column.left, column.right)
-                upd1 += ', %s, %s'
-                upd2.extend([0, 0])
-
             if field in self._columns \
                     and hasattr(self._columns[field], 'selection') \
                     and self._columns[field].selection \

trytond/test/mptt.py

@@ -30,4 +30,10 @@ class MPTT(ModelSQL, ModelView):
     def default_active(self):
         return True
 
+    def default_left(self):
+        return 0
+
+    def default_right(self):
+        return 0
+
 MPTT()