django.contrib.admin.filters SimpleListFilter Example Code

SimpleListFilter is a class within the Django project which can be subclasses to customize the Django admin's lookups and querying interface.

Understanding the following concepts are useful when coding projects that use Django's SimpleListFilter class:

You can also view the complete all topics page for even more resources.

Example 1 from AuditLog

Auditlog (project documentation) is a Django app that logs changes to Python objects, similar to the Django admin's logs but with more details and output formats. Auditlog's source code is provided as open source under the MIT license.

django-auditlog / src / auditlog /

from django.contrib.admin import SimpleListFilter

class ResourceTypeFilter(SimpleListFilter):
    title = 'Resource Type'
    parameter_name = 'resource_type'

    def lookups(self, request, model_admin):
        qs = model_admin.get_queryset(request)
        types = qs.values_list('content_type_id', 'content_type__model')
        return list(types.order_by('content_type__model').distinct())

    def queryset(self, request, queryset):
        if self.value() is None:
            return queryset
        return queryset.filter(content_type_id=self.value())
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