django_admin_sidebar_dropdown_filters_for_fields_and_relations.py

1from django.contrib import admin
2from django_admin_list_filter_dropdown.filters import (
3    DropdownFilter, ChoiceDropdownFilter, RelatedDropdownFilter
4)
5from .models import MyModel
6
7@admin.register(MyModel)
8class MyModelAdmin(admin.ModelAdmin):
9    list_filter = (
10        # for ordinary fields
11        ('a_char_field', DropdownFilter),
12        # for choice fields
13        ('a_choice_field', ChoiceDropdownFilter),
14        # for related fields
15        ('a_foreign_key_field', RelatedDropdownFilter),
16    )