Fixed #35815 -- Allowed db_default to be a literal.

Author: timgraham

django/db/models/fields/__init__.py

@@ -391,7 +391,10 @@ def _check_db_default(self, databases=None, **kwargs):
 
         if (
             self.db_default is NOT_PROVIDED
-            or isinstance(self.db_default, Value)
+            or (
+                isinstance(self.db_default, Value)
+                or not hasattr(self.db_default, "resolve_expression")
+            )
             or databases is None
         ):
             return []