Filters Overview

INSTALLED_APPS = [
    # ... other apps
    "unfold",
    "unfold.contrib.filters",  # Enable filters
    "django.contrib.admin",
    # ...
]

from django.contrib import admin
from unfold.admin import ModelAdmin
from unfold.contrib.filters.admin import (
    DropdownFilter,
    RangeDateFilter,
    SingleNumericFilter,
)

from .models import Product


class CategoryFilter(DropdownFilter):
    title = "Category"
    parameter_name = "category"

    def lookups(self, request, model_admin):
        return (
            ("electronics", "Electronics"),
            ("clothing", "Clothing"),
            ("books", "Books"),
        )

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(category=self.value())
        return queryset


@admin.register(Product)
class ProductAdmin(ModelAdmin):
    list_filter = [
        CategoryFilter,
        ("price", SingleNumericFilter),
        ("created_at", RangeDateFilter),
    ]

@admin.register(Product)
class ProductAdmin(ModelAdmin):
    show_facets = admin.ShowFacets.ALWAYS
    list_filter = [
        ("category", DropdownFilter),
    ]