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Fixed #24766 -- Added join promotion for Case expressions

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Anssi Kääriäinen 2015-05-11 10:02:41 +03:00 • committed by Tim Graham
parent 8e86d9d3df
commit be9d645346
3 changed files with 42 additions and 1 deletions
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7
django/db/models/query_utils.py
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@ -87,7 +87,12 @@ class Q(tree.Node):
return clone
def resolve_expression(self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False):
clause, _ = query._add_q(self, reuse, allow_joins=allow_joins)
# We must promote any new joins to left outer joins so that when Q is
# used as an expression, rows aren't filtered due to joins.
joins_before = query.tables[:]
clause, joins = query._add_q(self, reuse, allow_joins=allow_joins)
joins_to_promote = [j for j in joins if j not in joins_before]
query.promote_joins(joins_to_promote)
return clause
@classmethod