old_contents: import django_filters
  from django.http import HttpResponse
  from django.shortcuts import redirect
  from rest_framework.renderers import JSONRenderer
  from rest_framework.viewsets import ModelViewSet
  from rest_framework.filters import OrderingFilter
  from rest_framework.response import Response
  from django_filters.rest_framework import DjangoFilterBackend, FilterSet
  
  from .models import Errata
  from .serializers import ErrataSerializer
  
  
  class JSONResponse(HttpResponse):
      """
      An HttpResponse that renders its content into JSON.
      """
      def __init__(self, data, **kwargs):
          content = JSONRenderer().render(data)
          kwargs['content_type'] = 'application/json'
          super(JSONResponse, self).__init__(content, **kwargs)
  
  
  class ErrataFilter(FilterSet):
      book_title = django_filters.CharFilter(name='book__title')
      book_id = django_filters.CharFilter(name='book__id')
  
      class Meta:
          model = Errata
          fields = ['book_title', 'book_id', 'archived']
  
  
  class ErrataView(ModelViewSet):
      queryset = Errata.objects.all()
      serializer_class = ErrataSerializer
      http_method_names = ['get', 'post', 'head']
      filter_backends = (DjangoFilterBackend, OrderingFilter)
      filter_class = ErrataFilter
      ordering_fields = ('id', 'resolution_date', 'created', 'modified', )
  
      def create(self, request, *args, **kwargs):
          errata_record = Errata.objects.latest('created')
  
          next = request.GET.get('next', '')
          if next:
              return redirect(next)
          else:
              serializer = self.get_serializer(errata_record)
              return Response(serializer.data)
  
new_contents: import django_filters
  from django.http import HttpResponse
  from rest_framework.renderers import JSONRenderer
  from rest_framework.viewsets import ModelViewSet
  from rest_framework.filters import OrderingFilter
  from django_filters.rest_framework import DjangoFilterBackend, FilterSet
  
  from .models import Errata
  from .serializers import ErrataSerializer
  
  
  class JSONResponse(HttpResponse):
      """
      An HttpResponse that renders its content into JSON.
      """
      def __init__(self, data, **kwargs):
          content = JSONRenderer().render(data)
          kwargs['content_type'] = 'application/json'
          super(JSONResponse, self).__init__(content, **kwargs)
  
  
  class ErrataFilter(FilterSet):
      book_title = django_filters.CharFilter(name='book__title')
      book_id = django_filters.CharFilter(name='book__id')
  
      class Meta:
          model = Errata
          fields = ['book_title', 'book_id', 'archived']
  
  
  class ErrataView(ModelViewSet):
      queryset = Errata.objects.all()
      serializer_class = ErrataSerializer
      http_method_names = ['get', 'post', 'head']
      filter_backends = (DjangoFilterBackend, OrderingFilter)
      filter_class = ErrataFilter
      ordering_fields = ('id', 'resolution_date', 'created', 'modified', )
  
subject: remove errata next parameter (#406)