python313Packages.django-polymorphic: fix django 5.1 compat

pkgs/development/python-modules/django-polymorphic/default.nix

@@ -21,6 +21,11 @@ buildPythonPackage rec {
     hash = "sha256-cEV9gnc9gLpAVmYkzSaQwDbgXsklMTq71edndDJeP9E=";
   };
 
+  patches = [
+    # https://github.com/jazzband/django-polymorphic/issues/616
+    ./django-5.1-compat.patch
+  ];
+
   build-system = [ setuptools ];
 
   dependencies = [ django ];

pkgs/development/python-modules/django-polymorphic/django-5.1-compat.patch

@@ -0,0 +1,22 @@
+From a2c48cedc45db52469b93b6fa7a5d50c6722586f Mon Sep 17 00:00:00 2001
+From: Ben Gosney <bengosney@googlemail.com>
+Date: Sun, 25 Aug 2024 14:49:33 +0100
+Subject: [PATCH] fix(query): handle None
+
+---
+ polymorphic/query.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/polymorphic/query.py b/polymorphic/query.py
+index 8e93281a..2d2df6c3 100644
+--- a/polymorphic/query.py
++++ b/polymorphic/query.py
+@@ -278,7 +278,7 @@ def tree_node_test___lookup(my_model, node):
+             elif hasattr(a, "get_source_expressions"):
+                 for source_expression in a.get_source_expressions():
+                     test___lookup(source_expression)
+-            else:
++            elif a is not None:
+                 assert "___" not in a.name, ___lookup_assert_msg
+ 
+         for a in args: