cmsmanage/doorcontrol/admin.py

from django.contrib import admin

from .models import HIDEvent


class IsRedFilter(admin.SimpleListFilter):
    title = "Is Red"
    parameter_name = "is_red"

    def lookups(self, request, model_admin):
        return (
            ("1", "Yes"),
            ("0", "No"),
        )

    def queryset(self, request, queryset):
        if self.value() is None:
            return queryset
        else:
            return queryset.filter(is_red=(self.value() == "1"))


@admin.register(HIDEvent)
class HIDEventAdmin(admin.ModelAdmin):
    search_fields = ["forename", "surname", "cardholder_id"]
    list_display = ["door_name", "timestamp", "event_type", "description", "is_red"]
    list_filter = [
        "timestamp",
        "door_name",
        "event_type",
        IsRedFilter,
    ]

    def get_queryset(self, request):
        return super().get_queryset(request).with_is_red()

    @admin.display(boolean=True)
    def is_red(self, obj):
        return obj.is_red

    def has_add_permission(self, request, obj=None):
        return False

    def has_change_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return False