- Fixed bug when using joined table inheritance from a table to a

select/alias on the base, where the PK columns were also not same
named; the persistence system would fail to copy primary key values
from the base table to the inherited table upon INSERT.
[ticket:2885]

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/sqlalchemy/orm/mapper.py b/lib/sqlalchemy/orm/mapper.py
index b3b872f38..2d354de54 100644
--- a/lib/sqlalchemy/orm/mapper.py
+++ b/lib/sqlalchemy/orm/mapper.py
@@ -2488,7 +2488,9 @@ class Mapper(_InspectionAttr):
             for m in self.iterate_to_root():
                 if m._inherits_equated_pairs and \
                     cols.intersection(
-                        [l for l, r in m._inherits_equated_pairs]):
+                      util.reduce(set.union,
+                          [l.proxy_set for l, r in m._inherits_equated_pairs])
+                      ):
                     result[table].append((m, m._inherits_equated_pairs))
 
         return result