Django filter with autocompletion - Issue with chaining filters

Using Django Mystery Errors
2

Check your widget initialization. Make sure your ModelSelect2 widget is properly initialized with the forward parameter:

region = ModelChoiceFilter(
    lookup_expr="exact", 
    queryset=Region.objects.all(),
    widget=autocomplete.ModelSelect2(
        url="auth_app:region-autocomplete", 
        forward=["country"]  
    ),
    label=_("Län")
)

and post your results.

Additionaly, this post might help you: How to pass dynamic value for django-filter or django-autocomplete-light ? - #9 by Jackjohn