DRF 的视图,路由和渲染器
2024-09-04 06:45:23
DRF 的视图,路由和渲染器
1 视图
简单的增删改查 : ModelViewSet; 复杂的操作使用APIView 和 GenericViewSet
APIView(View)
class HomeView(APIView):
def get(self,request,*args,**kwargs):
user_list = UserInfo.objects.all()
ser = IndexSerializer(user_list,many=True)
return Response(ser.data)
GenericAPIView(APIView)
注意 GenericAPIView 和 GenericViewSet 都需要 queryset = UserInfo.objects.all(); serializer_class = IndexSerializer 否则会报错
class HomeView(GenericAPIView):
queryset = UserInfo.objects.all()
serializer_class = IndexSerializer
pagination_class = PageNumberPagination
def get(self,request,*args,**kwargs):
user_list = self.get_queryset()
p = self.paginator
page_user_list = p.paginate_queryset(queryset=user_list, request=request, view=self)
ser = IndexSerializer(page_user_list,many=True)
return p.get_paginated_response(ser.data)
GenericViewSet(ViewSetMixin, generics.GenericAPIView)
使用之后需要修改路由, 分发请求做不同的操作
注意 GenericAPIView 和 GenericViewSet 都需要 queryset = UserInfo.objects.all(); serializer_class = IndexSerializer 否则会报错
修改路由 url(r'^home/', HomeView.as_view({'get':'list','post':'create'}))
url(r'^home/(?P<id>\d+)', HomeView.as_view({'get':'retrieve'}))
修改视图的方法
class HomeView(GenericViewSet):
queryset = UserInfo.objects.all()
serializer_class = IndexSerializer
pagination_class = PageNumberPagination
def list(self,request,*args,**kwargs):
..
def create():...
def retrieve():...
ModelViewSet(mixins.CreateModelMixin,mixins.RetrieveModelMixin,mixins.UpdateModelMixin,mixins.DestroyModelMixin,mixins.ListModelMixin,GenericViewSet)
url(r'^home/$', HomeView.as_view({'get':'list','post':'create'}),name='home'),
url(r'^home/(?P<pk>\d+)$', HomeView.as_view({'get':'retrieve','put':'update','patch':'partial_update','delete':'destroy'})),
class HomeViewSet(ModelViewSet):
queryset = UserInfo.objects.all()
serializer_class = IndexSerializer
pagination_class = PageNumberPagination
# 不需要自定义方法
'get':'retrieve' == >> 权限的粒度 达到 单条对象级别,即单条数据 权限认证 check_object_permission
注意: GenericAPIView之后 , GenericViewSet ,ModelViewSet 内部都会检测 queryset和serializer_class,
都需要 queryset = UserInfo.objects.all(); serializer_class = IndexSerializer 否则会报错
2 路由
需要配置一套 .(?P\w+) 来请求不同的数据类型
自定义路由
from django.conf.urls import url, include
from web.views import s11_render
urlpatterns = [
url(r'^test/$', s11_render.TestView.as_view()),
url(r'^test\.(?P<format>[a-z0-9]+)$', s11_render.TestView.as_view()),
url(r'^test/(?P<pk>[^/.]+)/$', s11_render.TestView.as_view()),
url(r'^test/(?P<pk>[^/.]+)\.(?P<format>[a-z0-9]+)$', s11_render.TestView.as_view())
]
from rest_framework.views import APIView
from rest_framework.response import Response
from .. import models
class TestView(APIView):
def get(self, request, *args, **kwargs):
print(kwargs)
print(self.renderer_classes)
return Response('...')
半自动路由
url(r'^home/$', HomeView.as_view({'get':'list','post':'create'}),name='home'),
url(r'^home/(?P<pk>\d+)$', HomeView.as_view({'get':'retrieve','put':'update','patch':'partial_update','delete':'destroy'})),
url(r'^home\.(?P<format>\w+)$', HomeView.as_view({'get':'list','post':'create'}),name='home'),
url(r'^home/(?P<pk>\d+)\.(?P<format>\w+)$', HomeView.as_view({'get':'retrieve','put':'update','patch':'partial_update','delete':'destroy'})),
]
from rest_framework.viewsets import ModelViewSet
from rest_framework import serializers
from .. import models
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = models.UserInfo
fields = "__all__"
class UserViewSet(ModelViewSet):
queryset = models.UserInfo.objects.all()
serializer_class = UserSerializer
全自动路由
注意 serializer 需要使用 modelserailizer 全部字段
view 需要 viewset(对应不同的数据处理方式)
from django.conf.urls import url, include
from rest_framework import routers
from web.views import UserViewSet
router = routers.DefaultRouter()
router.register(r'users', UserViewSet)
urlpatterns = [
url(r'^', include(router.urls)),
]
from rest_framework.viewsets import ModelViewSet
from rest_framework import serializers
from .. import models
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = models.UserInfo
fields = "__all__"
class UserViewSet(ModelViewSet):
queryset = models.UserInfo.objects.all()
serializer_class = UserSerializer
3 渲染器
根据 用户请求URL 或 用户可接受的类型,筛选出合适的 渲染组件
renderer_classes = [JSONRenderer,BrowsableAPIRenderer,AdminRenderer]
http://127.0.0.1:8000/test/?format=json
http://127.0.0.1:8000/test.json
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