Default filter in Django admin

Question

How can I change the default filter choice from \'ALL\'? I have a field named as status which has three values: activate, pending and

Answer 1

A slight improvement on Greg's answer using DjangoChoices, Python >= 2.5 and of course Django >= 1.4.

from django.utils.translation import ugettext_lazy as _
from django.contrib.admin import SimpleListFilter

class OrderStatusFilter(SimpleListFilter):
    title = _('Status')

    parameter_name = 'status__exact'
    default_status = OrderStatuses.closed

    def lookups(self, request, model_admin):
        return (('all', _('All')),) + OrderStatuses.choices

    def choices(self, cl):
        for lookup, title in self.lookup_choices:
            yield {
                'selected': self.value() == lookup if self.value() else lookup == self.default_status,
                'query_string': cl.get_query_string({self.parameter_name: lookup}, []),
                'display': title,
            }

    def queryset(self, request, queryset):
        if self.value() in OrderStatuses.values:
            return queryset.filter(status=self.value())
        elif self.value() is None:
            return queryset.filter(status=self.default_status)


class Admin(admin.ModelAdmin):
    list_filter = [OrderStatusFilter] 

Thanks to Greg for the nice solution!