fix: multiple dropdown params (#671)

Author: lukasvinclav

src/unfold/admin.py

@@ -245,13 +245,14 @@ def media(self):
         additional_media = forms.Media()
 
         for filter in self.list_filter:
-            if not isinstance(filter, (tuple, list)):
-                continue
-
-            if hasattr(filter[1], "form_class") and hasattr(
-                filter[1].form_class, "Media"
+            if (
+                isinstance(filter, (tuple, list))
+                and hasattr(filter[1], "form_class")
+                and hasattr(filter[1].form_class, "Media")
             ):
                 additional_media += forms.Media(filter[1].form_class.Media)
+            elif hasattr(filter, "form_class") and hasattr(filter.form_class, "Media"):
+                additional_media += forms.Media(filter.form_class.Media)
 
         return media + additional_media
 

src/unfold/contrib/filters/admin.py

@@ -129,9 +129,16 @@ def choices(self, changelist: ChangeList) -> Tuple[Dict[str, Any], ...]:
         )
 
 
-class MultipleDropdownFilter(MultiValueMixin, DropdownFilter):
+class MultipleDropdownFilter(DropdownFilter):
     multiple = True
 
+    def __init__(self, request, params, model, model_admin):
+        self.request = request
+        super().__init__(request, params, model, model_admin)
+
+    def value(self):
+        return self.request.GET.getlist(self.parameter_name)
+
 
 class ChoicesDropdownFilter(ValueMixin, DropdownMixin, admin.ChoicesFieldListFilter):
     def choices(self, changelist: ChangeList):