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-rw-r--r--lib/sqlalchemy/orm/strategy_options.py15
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/sqlalchemy/orm/strategy_options.py b/lib/sqlalchemy/orm/strategy_options.py
index 276da2ae0..90e4e9661 100644
--- a/lib/sqlalchemy/orm/strategy_options.py
+++ b/lib/sqlalchemy/orm/strategy_options.py
@@ -364,6 +364,7 @@ class _UnboundLoad(Load):
return None
token = start_path[0]
+
if isinstance(token, util.string_types):
entity = self._find_entity_basestring(query, token, raiseerr)
elif isinstance(token, PropComparator):
@@ -407,10 +408,18 @@ class _UnboundLoad(Load):
# prioritize "first class" options over those
# that were "links in the chain", e.g. "x" and "y" in
# someload("x.y.z") versus someload("x") / someload("x.y")
- if self._is_chain_link:
- effective_path.setdefault(context, "loader", loader)
+
+ if effective_path.is_token:
+ for path in effective_path.generate_for_superclasses():
+ if self._is_chain_link:
+ path.setdefault(context, "loader", loader)
+ else:
+ path.set(context, "loader", loader)
else:
- effective_path.set(context, "loader", loader)
+ if self._is_chain_link:
+ effective_path.setdefault(context, "loader", loader)
+ else:
+ effective_path.set(context, "loader", loader)
def _find_entity_prop_comparator(self, query, token, mapper, raiseerr):
if _is_aliased_class(mapper):