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-rw-r--r--lib/sqlalchemy/orm/strategies.py18
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/sqlalchemy/orm/strategies.py b/lib/sqlalchemy/orm/strategies.py
index 2674b9c6f..567c09fff 100644
--- a/lib/sqlalchemy/orm/strategies.py
+++ b/lib/sqlalchemy/orm/strategies.py
@@ -208,10 +208,24 @@ class DeferredColumnLoader(LoaderStrategy):
def setup_query(self, context, entity, path, loadopt, adapter,
only_load_props=None, **kwargs):
+
if (
- loadopt and self.group and
+ (
+ loadopt and
+ 'undefer_pks' in loadopt.local_opts and
+ set(self.columns).intersection(self.parent.primary_key)
+ )
+ or
+ (
+ loadopt and
+ self.group and
loadopt.local_opts.get('undefer_group', False) == self.group
- ) or (only_load_props and self.key in only_load_props):
+ )
+ or
+ (
+ only_load_props and self.key in only_load_props
+ )
+ ):
self.parent_property._get_strategy_by_cls(ColumnLoader).\
setup_query(context, entity,
path, loadopt, adapter, **kwargs)