django-unfold-admin-list-filter-dropdown

[!NOTE]
This version is compatible with django-unfold.

A Django admin filter implementation that renders as a dropdown.

If you have more than ten values for a field that you want to filter by in Django admin, the filtering sidebar gets long, cluttered and hard to use.

This app contains the DropdownFilter class that renders as a drop-down in the filtering sidebar to avoid this problem.

Usage

Install:

pip install django-unfold-admin-list-filter-dropdown

Enable in settings.py:

INSTALLED_APPS = (
    ...
    'django_unfold_admin_listfilter_dropdown',
    ...
)

Use in admin.py:

from django_admin_listfilter_dropdown.filters import DropdownFilter, RelatedDropdownFilter, ChoiceDropdownFilter

class EntityAdmin(admin.ModelAdmin):
    ...
    list_filter = (
        # for ordinary fields
        ('a_charfield', DropdownFilter),
        # for choice fields
        ('a_choicefield', ChoiceDropdownFilter),
        # for related fields
        ('a_foreignkey_field', RelatedDropdownFilter),
    )

Example of a custom filter that uses the provided template:

class CustomFilter(SimpleListFilter):
    template = 'django_unfold_admin_listfilter_dropdown/dropdown_filter.html'

    def lookups(self, request, model_admin):
        ...

    def queryset(self, request, queryset):
        ...