fix multiple join error in sqlalchemy 1.0.2

jfinkels · Apr 29, 2015 · 9b06b95 · 9b06b95
1 parent 21c10ce
commit 9b06b95
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/flask_restless/search.py b/flask_restless/search.py
@@ -495,7 +495,8 @@ def create_query(session, model, search_params, _ignore_order_by=False):
                         relation_model = relation.mapper.class_
                         field = getattr(relation_model, field_name_in_relation)
                         direction = getattr(field, val.direction)
-                        query = query.join(relation_model)
+                        if relation_model not in [j.mapper.class_ for j in query._join_entities]:
+                            query = query.join(relation_model)
                         query = query.order_by(direction())
                     else:
                         field = getattr(model, val.field)