Cached ForeignObject.(local/foreign/reverse)_related_fields properties.

1 files changed, 5 insertions, 7 deletions

diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 88bc0b5c15..f269d9e17f 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -616,21 +616,19 @@ class ForeignObject(RelatedField):
             related_fields.append((from_field, to_field))
         return related_fields
 
-    @property
+    @cached_property
     def related_fields(self):
-        if not hasattr(self, '_related_fields'):
-            self._related_fields = self.resolve_related_fields()
-        return self._related_fields
+        return self.resolve_related_fields()
 
-    @property
+    @cached_property
     def reverse_related_fields(self):
         return [(rhs_field, lhs_field) for lhs_field, rhs_field in self.related_fields]
 
-    @property
+    @cached_property
     def local_related_fields(self):
         return tuple(lhs_field for lhs_field, rhs_field in self.related_fields)
 
-    @property
+    @cached_property
     def foreign_related_fields(self):
         return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field)