1. APIクラスビューAPIViewオーバーライド
カテゴリビューAPIView、置換@api_viewデコレータ、次のように:
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
class SnippetList(APIView):
def get(self, request):
snippets = Snippet.objects.all()
serializer = SnippetSerializer(snippets, many=True)
return Response(serializer.data)
def post(self, request):
data = request.data
serializer = SnippetSerializer(data=data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
class SnippetDetail(APIView):
def get_object(self, pk):
try:
return Snippet.objects.get(pk=pk)
except Exception as e:
pass
def get(self, request, pk):
snippet = self.get_object(pk)
serializer = SnippetSerializer(snippet)
return Response(serializer.data)
def put(self, request, pk):
snippet = self.get_object(pk)
serializer = SnippetSerializer(snippet, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def delete(self, request, pk):
snippet = self.get_object(pk)
snippet.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
2.編集urls.py
from django.conf.urls import url, include
from django.contrib import admin
from snippets import views
urlpatterns = [
url(r'^snippets/$', views.SnippetList.as_view()),
url(r'^snippets/(?P<pk>[0-9]+)/$', views.SnippetDetail.as_view()),
url(r'^admin/', admin.site.urls),
url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]
APIViewビュークラス、呼び出しas_view()メソッド
3.ミックスイン
ミックスインは、CRUD操作は次のようにミックスインコードを使用して簡略化することができるカプセル化します。
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework import mixins, generics
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
class SnippetList(mixins.ListModelMixin,
mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = Snippet.objects.all()
serializer_class = SnippetSerializer
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class SnippetDetail(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
generics.GenericAPIView):
queryset = Snippet.objects.all()
serializer_class = SnippetSerializer
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
SnippetList继承了mixins的ListModelMixin和CreateModelMixin类,赋值queryset,serializer_class属性,
その後GET、POSTメソッドを定義し、それぞれミックスインは、リストを呼び出す関数を作成します。SnippetDetailも同様に定義されました。
4.一般的なクラスビュージェネリック
rest_frameworkはCRUDは、複雑な多重継承を最適化可能な組み合わせを定義します
from rest_framework import generics
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
class SnippetList(generics.ListCreateAPIView):
queryset = Snippet.objects.all()
serializer_class = SnippetSerializer
class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
queryset = Snippet.objects.all()
serializer_class = SnippetSerializer
ListCreateAPIViewとジェネリックRetrieveUpdateDestroyAPIView代替クラスのミックスインの使用はまた、GET、POSTメソッドを削除します
5.ビューセットはさらに単純化された
次のようにビューセットには、変更の検索操作のすべてのモデルの欠失が含まれています。
from rest_framework import viewsets
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
class SnippetViewSet(viewsets.ModelViewSet):
queryset = Snippet.objects.all()
serializer_class = SnippetSerializer