Ticket #11804: remove-filter-isnull.diff

django/contrib/admin/views/main.py

@@ -86 +86 @@
         if new_params is None: new_params = {}
         if remove is None: remove = []
         p = self.params.copy()
+        for r in remove[:]:
+            if r.endswith('__exact'):
+                remove.append(r.replace('__exact', '__isnull'))
+        for k in new_params.keys():
+            if k.endswith('__exact'):
+                remove.append(k.replace('__exact', '__isnull'))
         for r in remove:
             for k in p.keys():
                 if k.startswith(r):