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-rw-r--r--django/db/models/sql/where.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/django/db/models/sql/where.py b/django/db/models/sql/where.py
index bf0828dc8b..795eff8395 100644
--- a/django/db/models/sql/where.py
+++ b/django/db/models/sql/where.py
@@ -159,6 +159,9 @@ class WhereNode(tree.Node):
clone.relabel_aliases(change_map)
return clone
+ def copy(self):
+ return self.clone()
+
@classmethod
def _contains_aggregate(cls, obj):
if isinstance(obj, tree.Node):