A pattern for implementing RESTfull nested resources in Django

appname1-urls.py

from django.conf.urls import patterns, url
from django.contrib.contenttypes.models import ContentType

from appname1.views import PostListView, PostDetailView, \
    PostCreateView, PostDeleteView, PostUpdateView
from appname2.views import CommentListView,\
    CommentDetailView, CommentCreateView, CommentDeleteView, \
    CommentUpdateView

from models import Post

urlpatterns = patterns('',
       url (
           regex = '^/?$',
           view =  PostListView.as_view(),
           name = 'post_list'
       ),

       url (
           regex = r'^(?P<pk>\d+)/$',
           view =  PostDetailView.as_view(),
           name = 'post_detail'
       ),
       url (
           regex = r'^new/$',
           view =  PostCreateView.as_view(),
           name = 'post_create'
       ),

       url (
           regex = '^(?P<pk>\d+)/delete/$',
           view =  PostDeleteView.as_view(),
           name = 'post_delete'
       ),
       url (
           regex = '^(?P<pk>\d+)/edit/$',
           view =  PostUpdateView.as_view(),
           name = 'post_update'
       ),
)

post_content_type = ContentType.objects.get_for_model(Post)

urlpatterns += patterns('',
                        url (
        regex = r'^(?P<object_id>\d+)/comments$',
        view = CommentListView.as_view(
            content_type=post_content_type
            ),
        name = 'post_comment_list',
        ),
                        url (
        regex = r'^(?P<object_id>\d+)/comments/(?P<pk>\d+)/$',
        view =  CommentDetailView.as_view(
            content_type=post_content_type
            ),
        name = 'post_comment_detail',
        ),
                        url (
        regex = r'^(?P<object_id>\d+)/comments/new/$',
        view =  CommentCreateView.as_view(
            content_type=post_content_type
            ),
        name = 'post_comment_create',
        ),

                       url (
        regex = '^(?P<object_id>\d+)/comment/(?P<pk>\d+)/delete/$',
        view =  CommentDeleteView.as_view(
            content_type=post_content_type
            ),
        name = 'post_comment_delete',
        ),
                       url (
        regex = '^(?P<object_id>\d+)/comment/(?P<pk>\d+)/edit/$',
        view =  CommentUpdateView.as_view(
            content_type=post_content_type
            ),
        name = 'post_comment_update',
        ),
                        )

appname1-views.py

from django.views.generic import ListView, DetailView, CreateView,\
    DeleteView, UpdateView

from appname1.models import Post


class PostCBVMixin(object):

    model = Post

    def get_success_url(self):
        return reverse('post_list')

    def get_queryset(self):
        return Post.objects.all()


class PostListView(PostCBVMixin, ListView):
    pass


class PostDetailView(PostCBVMixin, DetailView):
    pass


class PostCreateView(PostCBVMixin, CreateView):
    pass


class PostDeleteView(PostCBVMixin, DeleteView):
    pass


class PostUpdateView(PostCBVMixin, UpdateView):
    pass

appname2-views.py

from django.views.generic import ListView, DetailView, CreateView,\
    DeleteView, UpdateView

from appname2.models import Comment


class CommentCBVMixin(object):

    model = Comment
    content_type = None

    def get_success_url(self):
        return reverse('comment_list')

    def get_queryset(self):
        return Comment.objects.filter(
            content_type__pk=self.content_type,
            object_id=object_id
            )

    def get_template_names(self):
        def prepend_app_model_name(template_name):
            return "/".join([
                    self.content_type.app_label,
                    self.content_type.name,
                    template_name
                    ])

        names = super(CommentCBVMixin, self).get_template_names()
        names = map(prepend_app_model_name, names)
        return names

    def form_valid(self, form):
        form.instance.content_type_id = self.content_type.id
        form.instance.object_id = self.kwargs.get('object_id')
        return super(CommentCBVMixin, self).form_valid(form)


class CommentListView(CommentCBVMixin, ListView):
    pass


class CommentDetailView(CommentCBVMixin, DetailView):
    pass


class CommentCreateView(CommentCBVMixin, CreateView):
    pass


class CommentDeleteView(CommentCBVMixin, DeleteView):
    pass


class CommentUpdateView(CommentCBVMixin, UpdateView):
    pass