add get_manager to django-cte

django_cte/cte.py

@@ -74,7 +74,7 @@ def join(self, model_or_queryset, *filter_q, **filter_kw):
  if isinstance(model_or_queryset, QuerySet):
  queryset = model_or_queryset.all()
  else:
- queryset = model_or_queryset._default_manager.all()
+ queryset = self.get_manager(model_or_queryset).all()
  join_type = filter_kw.pop("_join_type", INNER)
  query = queryset.query
 
@@ -89,6 +89,16 @@ def join(self, model_or_queryset, *filter_q, **filter_kw):
  query.join(QJoin(parent, self.name, self.name, on_clause, join_type))
  return queryset
 
+ def get_manager(self, model):
+ """Get a manager for this model
+
+ The model's default_manager will be used by default.
+ This method may be over-riden to use custom managers
+
+ :returns: A manager.
+ """
+ return model._default_manager
+
  def queryset(self):
  """Get a queryset selecting from this CTE
 
@@ -100,7 +110,7 @@ def queryset(self):
  :returns: A queryset.
  """
  cte_query = self.query
- qs = cte_query.model._default_manager.get_queryset()
+ qs = self.get_manager(cte_query.model).get_queryset()
 
  query = CTEQuery(cte_query.model)
  query.join(BaseTable(self.name, None))