Encapsulated loop logic to avoid leaking module-level variables.

1 files changed, 8 insertions, 4 deletions

diff --git a/django/db/models/expressions.py b/django/db/models/expressions.py
index 9d3c1241e7..9c734c60a1 100644
--- a/django/db/models/expressions.py
+++ b/django/db/models/expressions.py
@@ -705,10 +705,14 @@ def register_combinable_fields(lhs, connector, rhs, result):
     _connector_combinators[connector].append((lhs, rhs, result))
 
 
-for d in _connector_combinations:
-    for connector, field_types in d.items():
-        for lhs, rhs, result in field_types:
-            register_combinable_fields(lhs, connector, rhs, result)
+def _register_combinable_fields():
+    for d in _connector_combinations:
+        for connector, field_types in d.items():
+            for lhs, rhs, result in field_types:
+                register_combinable_fields(lhs, connector, rhs, result)
+
+
+_register_combinable_fields()
 
 
 @functools.lru_cache(maxsize=128)