Fixed cached_properties that share a common property.

The aliases aren't cached and thus the old usage will be an error after
refs #29478.

1 files changed, 9 insertions, 7 deletions

diff --git a/django/db/backends/postgresql/features.py b/django/db/backends/postgresql/features.py
index 4fae7b1d34..3f43abf9d5 100644
--- a/django/db/backends/postgresql/features.py
+++ b/django/db/backends/postgresql/features.py
@@ -1,3 +1,5 @@
+import operator
+
 from django.db.backends.base.features import BaseDatabaseFeatures
 from django.db.utils import InterfaceError
 from django.utils.functional import cached_property
@@ -64,10 +66,10 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     def is_postgresql_10(self):
         return self.connection.pg_version >= 100000
 
-    has_select_for_update_skip_locked = is_postgresql_9_5
-    has_brin_index_support = is_postgresql_9_5
-    has_jsonb_agg = is_postgresql_9_5
-    has_brin_autosummarize = is_postgresql_10
-    has_gin_pending_list_limit = is_postgresql_9_5
-    supports_ignore_conflicts = is_postgresql_9_5
-    has_phraseto_tsquery = is_postgresql_9_6
+    has_select_for_update_skip_locked = property(operator.attrgetter('is_postgresql_9_5'))
+    has_brin_index_support = property(operator.attrgetter('is_postgresql_9_5'))
+    has_jsonb_agg = property(operator.attrgetter('is_postgresql_9_5'))
+    has_brin_autosummarize = property(operator.attrgetter('is_postgresql_10'))
+    has_gin_pending_list_limit = property(operator.attrgetter('is_postgresql_9_5'))
+    supports_ignore_conflicts = property(operator.attrgetter('is_postgresql_9_5'))
+    has_phraseto_tsquery = property(operator.attrgetter('is_postgresql_9_6'))