queryset-refactor: Fixed a problem when adding certain additional filters to a queryset that has precisely one filter attached already.

Refs #6154.


git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@6957 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/sql/query.py

@@ -792,6 +792,11 @@ class Query(object):
             q_object.add_to_query(self)
             return
 
+        if self.where and q_object.connector != AND and len(q_object) > 1:
+            self.where.start_subtree(AND)
+            subtree = True
+        else:
+            subtree = False
         for child in q_object.children:
             if isinstance(child, Node):
                 self.where.start_subtree(q_object.connector)
@@ -799,6 +804,8 @@ class Query(object):
                 self.where.end_subtree()
             else:
                 self.add_filter(child, q_object.connector, q_object.negated)
+        if subtree:
+            self.where.end_subtree()
 
     def setup_joins(self, names, opts, alias, dupe_multis):
         """

django/utils/tree.py

@@ -87,8 +87,8 @@ class Node(object):
     def start_subtree(self, conn_type):
         """
         Sets up internal state so that new nodes are added to a subtree of the
-        current node. The conn_type is required so that the new subtree is
+        current node. The conn_type specifies how the sub-tree is joined to the
-        connected correctly to any existing nodes in the tree.
+        existing children.
         """
         if len(self.children) == 1:
             self.connector = conn_type

tests/regressiontests/queries/models.py

@@ -459,5 +459,12 @@ order_by() and filter() calls.
 >>> Item.objects.extra(select={'count': 'select count(*) from queries_item_tags where queries_item_tags.item_id = queries_item.id'}).filter(count=1)
 [<Item: four>]
 
+Bug #6154
+Multiple filter statements are joined using "AND" all the time.
+
+>>> Author.objects.filter(id=a1.id).filter(Q(extra__note=n1)|Q(item__note=n3))
+[<Author: a1>]
+>>> Author.objects.filter(Q(extra__note=n1)|Q(item__note=n3)).filter(id=a1.id)
+[<Author: a1>]
 """}