fix: filter_params when Django < 5.0 (#1108)

Author: sezginacer

src/unfold/admin.py

@@ -20,6 +20,7 @@
 from unfold.mixins import ActionModelAdminMixin, BaseModelAdminMixin
 from unfold.overrides import FORMFIELD_OVERRIDES_INLINE
 from unfold.typing import FieldsetsType
+from unfold.views import ChangeList
 from unfold.widgets import UnfoldBooleanWidget
 
 checkbox = UnfoldBooleanWidget(
@@ -168,6 +169,9 @@ def response_add(
             return redirect(request.GET["next"])
         return res
 
+    def get_changelist(self, request, **kwargs):
+        return ChangeList
+
 
 class TabularInline(BaseModelAdminMixin, BaseTabularInline):
     formfield_overrides = FORMFIELD_OVERRIDES_INLINE

src/unfold/views.py

@@ -1,8 +1,21 @@
 from typing import Any
 
+import django
+from django.contrib.admin.views.main import ERROR_FLAG, PAGE_VAR
+from django.contrib.admin.views.main import ChangeList as BaseChangeList
 from django.contrib.auth.mixins import PermissionRequiredMixin
 
-from .exceptions import UnfoldException
+from unfold.exceptions import UnfoldException
+
+
+class ChangeList(BaseChangeList):
+    def __init__(self, request, *args, **kwargs):
+        super().__init__(request, *args, **kwargs)
+
+        if django.VERSION < (5, 0):
+            self.filter_params = dict(request.GET.lists())
+            self.filter_params.pop(PAGE_VAR, None)
+            self.filter_params.pop(ERROR_FLAG, None)
 
 
 class UnfoldModelAdminViewMixin(PermissionRequiredMixin):