1 files changed, 17 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/sync.py b/lib/sqlalchemy/orm/sync.py
index e1ef85c1d..671c7c067 100644
--- a/lib/sqlalchemy/orm/sync.py
+++ b/lib/sqlalchemy/orm/sync.py
@@ -45,6 +45,23 @@ def populate(source, source_mapper, dest, dest_mapper,
             uowcommit.attributes[("pk_cascaded", dest, r)] = True
 
 
+def bulk_populate_inherit_keys(
+        source_dict, source_mapper, synchronize_pairs):
+    # a simplified version of populate() used by bulk insert mode
+    for l, r in synchronize_pairs:
+        try:
+            prop = source_mapper._columntoproperty[l]
+            value = source_dict[prop.key]
+        except exc.UnmappedColumnError:
+            _raise_col_to_prop(False, source_mapper, l, source_mapper, r)
+
+        try:
+            prop = source_mapper._columntoproperty[r]
+            source_dict[prop.key] = value
+        except exc.UnmappedColumnError:
+            _raise_col_to_prop(True, source_mapper, l, source_mapper, r)
+
+
 def clear(dest, dest_mapper, synchronize_pairs):
     for l, r in synchronize_pairs:
         if r.primary_key and \