From a9c901ba022ce9de9e3f0b8c9085bf59656d495f Mon Sep 17 00:00:00 2001
From: Gleb Lysov <17965301+hardenchant@users.noreply.github.com>
Date: Fri, 12 Mar 2021 16:32:14 +0300
Subject: [PATCH] fix error psycopg2.ProgrammingError: can't adapt type
 'CombinedExpression'

---
 bitfield/admin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bitfield/admin.py b/bitfield/admin.py
index 30f0cf0e..d1766d2e 100644
--- a/bitfield/admin.py
+++ b/bitfield/admin.py
@@ -23,7 +23,7 @@ def __init__(self, field, request, params, model, model_admin, field_path):
 
     def queryset(self, request, queryset):
         filter_kwargs = dict(
-            (p, BitHandler(v, ()))
+            (p, BitHandler(v, getattr(queryset.model, p)))
             for p, v in six.iteritems(self.used_parameters)
         )
         if not filter_kwargs: