SimpleListFilter

from django.contrib.admin import SimpleListFilter
 
 
class InputFilter(SimpleListFilter):
    template = 'admin/input_filter.html'
 
    def lookups(self, request, model_admin):
        # Dummy, required to show the filter.
        return ((),)
 
class CustomFilter(InputFilter):
    parameter_name = 'un'
    title = 'crm'
 
    def queryset(self, request, queryset):
        if self.value() is not None:
            un = self.value()
         
            # return queryset.filter(
            #     Q(unazev__contains=uid) |
            #     Q(vlastnik__contains=uid)
            # )
            return queryset.filter(
                Q(unazev=un)
            )