django-rest-framework-chain is an extension to Django REST Framework that allows arbitrary chaining of both relations and lookup filters.
E.g. this allows you to do stuff like:
/api/page/?author__username__icontains=john /api/page/?author__username__endswith=smith
Without having to create a zillion filter fields by hand.
$ pip install djangorestframework-chain- Python 2.6+
- Django 1.4.5+
To enable chained filtering through relations:
from rest_framework import viewsets
import django_filters
from rest_framework_chain import ChainedFilterSet, RelatedFilter
# Just a regular FilterSet
class UserFilter(django_filters.FilterSet):
username = django_filters.CharFilter(name='username')
...
class PageFilter(ChainedFilterSet):
title = django_filters.CharFilter(name='title')
author = RelatedFilter(UserFilter, name='author')
...
# Then just use the PageFilter as you would any other FilterSet:
class PageView(viewsets.ModelViewSet):
...
filter_class = PageFilterthen we can automatically chain our filters through the author relation, as so:
/api/page/?author__username=philipn
We can use the AllLookupsFilter to allow all possible lookup types on a particular
field. While we could otherwise specify these by hand, e.g.:
class ProductFilter(django_filters.FilterSet):
min_price = django_filters.NumberFilter(name="price", lookup_type='gte')
...to allow the price__gte lookup. But this gets cumbersome, and we sometimes want to
allow any possible lookups on particular fields. We do this by using AllLookupsFilter:
from rest_framework import viewsets
import django_filters
from rest_framework_chain import ChainedFilterSet, AllLookupsFilter
class PageFilter(ChainedFilterSet):
title = AllLookupsFilter(name='title')
...then we can use any possible lookup on the title field, e.g.:
/api/page/?title__icontains=park
or
/api/page/?title__startswith=The
and also filter on the default lookup (exact), as usual:
/api/page/?title=The%20Park
We can combine RelatedFilter and AllLookupsFilter:
from rest_framework import viewsets
import django_filters
from rest_framework_chain import ChainedFilterSet, RelatedFilter
class PageFilter(ChainedFilterSet):
title = django_filters.CharFilter(name='title')
author = RelatedFilter(UserFilter, name='author')
# Just a regular FilterSet
class UserFilter(ChainedFilterSet):
username = AllLookupsFilter(name='username')
...then we can filter like so:
/api/page/?author__username__icontains=john
Recursive relations are supported. You will need to specify the full module
path in the RelatedFilter definition in some cases, e.g.:
class PersonFilter(ChainedFilterSet):
name = AllLookupsFilter(name='name')
best_friend = RelatedFilter('people.views.PersonFilter', name='best_friend')
class Meta:
model = PersonCopyright (c) 2013 Philip Neustrom <philipn@gmail.com>
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