Refs #16043 -- Refactored internal fields value cache.

* Removed all hardcoded logic for _{fieldname}_cache.
* Added an internal API for interacting with the field values cache.

Thanks carljm and MarkusH for support.

1 files changed, 9 insertions, 4 deletions

diff --git a/django/db/models/fields/reverse_related.py b/django/db/models/fields/reverse_related.py
index ab8b3ffe58..1f42375566 100644
--- a/django/db/models/fields/reverse_related.py
+++ b/django/db/models/fields/reverse_related.py
@@ -13,9 +13,10 @@ from django.core import exceptions
 from django.utils.functional import cached_property
 
 from . import BLANK_CHOICE_DASH
+from .mixins import FieldCacheMixin
 
 
-class ForeignObjectRel:
+class ForeignObjectRel(FieldCacheMixin):
     """
     Used by ForeignObject to store information about the relation.
 
@@ -162,12 +163,16 @@ class ForeignObjectRel:
             return self.related_name
         return opts.model_name + ('_set' if self.multiple else '')
 
-    def get_cache_name(self):
-        return "_%s_cache" % self.get_accessor_name()
-
     def get_path_info(self):
         return self.field.get_reverse_path_info()
 
+    def get_cache_name(self):
+        """
+        Return the name of the cache key to use for storing an instance of the
+        forward model on the reverse model.
+        """
+        return self.get_accessor_name()
+
 
 class ManyToOneRel(ForeignObjectRel):
     """