标签：校验 enter first ram nat spl turn nbsp 父类
ModelModelSerializer和ModelForm组件很相似
from rest_framework.serializers import ModelSerializer class BookModelSerializers(ModelSerializer): class Meta: model=models.Book fields="__all__"
url(r‘^book/$‘, views.BookView.as_view())
from rest_framework.views import APIView from rest_framework.response import Response class BookView(APIView): def get(self, request): book_list = models.Book.objects.all() bs = BookModelSerializers(book_list, many=True) return Response(bs.data) # 序列化接口，将bs的所有内容都返回 #在处理get请求时只是将BookSerializers换为BookModelSerializers
def post(self,request): bs=BookModelSerializers(data=request.data,) if bs.is_valid():# 校验字段接口 bs.save() #创建记录接口create return Response(bs.data) # 序列化接口 return Response(bs.errors) # 序列化接口
接受到数据就，进行校验，如果合格，就存起来(save),否则就将错误显示出来
url(r‘^book/(\d+)/$‘, views.BookDetailView.as_view())
class BookDetailView(APIView): def get(self,request,pk): #对单个对象进行序列化 book=models.Book.objects.filter(pk=pk).first() bs=BookModelSerializers(book) #序列化具体的对象 return Response(bs.data) def put(self,request,pk): book = models.Book.objects.filter(pk=pk).first() bs=BookModelSerializers(data=request.data,instance=book) if bs.is_valid(): bs.save() return Response(bs.data) else:return Response(bs.errors) def delete(self, request,pk): models.Book.objects.filter(pk=pk).first().delete() #如果删除就返回空 return Response()
使用ModelModelSerializer自定义编写视图
url
url(r‘^book/$‘, views.BookView.as_view()), url(r‘^book/(\d+)/$‘, views.BookDetailView.as_view()),
views.py
from rest_framework.serializers import ModelSerializer class BookModelSerializers(ModelSerializer): class Meta: model=models.Book fields="__all__"
from rest_framework.views import APIView from rest_framework.response import Response class BookView(APIView): def get(self,request): book_list=models.Book.objects.all() bs=BookModelSerializers(book_list,many=True) return Response(bs.data) # 序列化接口，将bs的所有内容都返回 def post(self,request): print("request.data", request.data) bs=BookModelSerializers(data=request.data,) if bs.is_valid():# 校验字段接口 bs.save() #创建记录接口create return Response(bs.data) # 序列化接口 return Response(bs.errors) # 序列化接口
class BookDetailView(APIView): def get(self,request,pk): #对单个对象进行序列化 book=models.Book.objects.filter(pk=pk).first() bs=BookModelSerializers(book) return Response(bs.data) def put(self,request,pk): book = models.Book.objects.filter(pk=pk).first() ###bs为序列化对象 bs=BookModelSerializers(data=request.data,instance=book) if bs.is_valid(): bs.save() return Response(bs.data) else:return Response(bs.errors) def delete(self, request,pk): models.Book.objects.filter(pk=pk).first().delete() #如果删除就返回空 return Response()
url(r‘^publish/$‘, views.PublishView.as_view()), url(r‘^publish/(?P<pk>\d+)/$‘, views.PublishDetailView.as_view()),
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.serializers import ModelSerializer
from rest_framework import mixins
from rest_framework import generics
class PublishModelSerializer(ModelSerializer): class Meta: model=models.Publish fields="__all__"
class PublishView(mixins.ListModelMixin,mixins.CreateModelMixin,generics.GenericAPIView): queryset = models.Publish.objects.all() serializer_class = PublishModelSerializer 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 PublishDetailView(mixins.DestroyModelMixin,mixins.RetrieveModelMixin,mixins.UpdateModelMixin,generics.GenericAPIView): queryset = models.Publish.objects.all() serializer_class = PublishModelSerializer 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)
url(r‘^authors/$‘, views.AuthorsView.as_view()), url(r‘^authors/(?P<pk>\d+)/$‘, views.AuthorsDetailView.as_view()),
class AuthorModelSerializers(ModelSerializer): class Meta: model=models.Author fields="__all__"
class AuthorsView(generics.ListCreateAPIView): queryset = Author.objects.all() serializer_class = AuthorModelSerializers class AuthorsDetailView(generics.RetrieveUpdateDestroyAPIView): queryset = Author.objects.all() serializer_class = AuthorModelSerializers
url(r‘^authors/$‘, views.AuthorsModelView.as_view({"get": "list", "post": "create"}),), url(r‘^authors/(?P<pk>\d+)/$‘, views.AuthorsModelView.as_view({ ‘get‘: ‘retrieve‘, ‘put‘: ‘update‘, ‘delete‘: ‘destroy‘ }),
views
from rest_framework.viewsets import ModelViewSet from app01 import models class AuthorsModelView(ModelViewSet): queryset = models.Author.objects.all() serializer_class = AuthorModelSerializers
使用viewsets.ModelViewSet方法便捷高效，具体流程：
1.django启动
Djago启动过后 views.AuthorsModelView.as_view({"get": "list", "post": "create"})
和views.AuthorsModelView.as_view({
‘get‘: ‘retrieve‘,
‘put‘: ‘update‘,
‘delete‘: ‘destroy‘
})都会被执行，找AuthorsModelView中的as_view方法，无此方法，去父类ModelViewSet查找
2.ModelViewSet源码：
class ModelViewSet(mixins.CreateModelMixin, mixins.RetrieveModelMixin, mixins.UpdateModelMixin, mixins.DestroyModelMixin, mixins.ListModelMixin, GenericViewSet): pass
ModelViewSet中无s_view方法，去父类中查找
CreateModelMixin中放着新建数据的函数
RetrieveModelMixin中放着查看某条数据的函数
UpdateModelMixin中放着更新数据的函数
DestroyModelMixin中放着删除数据的函数
ListModelMixin中放着展示全部数据的函数
去GenericViewSet中查找as_view方法
3.执行ViewSetMixin中的as_view
GenericViewSet源码：
class GenericViewSet(ViewSetMixin, generics.GenericAPIView):pass
GenericViewSet中无as_view方法，向其父类中查找
执行ViewSetMixin中的as_view。ViewSetMixin源码：
class ViewSetMixin(object): def as_view(cls, actions=None, **initkwargs): def view(request, *args, **kwargs): self = cls(**initkwargs) self.action_map = actions for method, action in actions.items(): handler = getattr(self, action) setattr(self, method, handler) if hasattr(self, ‘get‘) and not hasattr(self, ‘head‘): self.head = self.get self.request = request self.args = args self.kwargs = kwargs return self.dispatch(request, *args, **kwargs) return csrf_exempt(view)
找到as_view方法后，执行此方法返回view
url(r‘^authors/$‘, views.AuthorsModelView.as_view({"get": "list", "post": "create"}), ), url(r‘^authors/(?P<pk>\d+)/$‘, views.AuthorsModelView.as_view({ ‘get‘: ‘retrieve‘, ‘put‘: ‘update‘, ‘delete‘: ‘destroy‘ }), 相当于： url(r‘^authors/$‘, view), url(r‘^authors/(?P<pk>\d+)/$‘, view)
这是启动django后就完成的工作，当用户发送请求时，view执行
4.发送请求，执行ViewSetMixin中的view方法
def view(request, *args, **kwargs): self = cls(**initkwargs) for method, action in actions.items(): handler = getattr(self, action) setattr(self, method, handler) return self.dispatch(request, *args, **kwargs)
最终的返回值时执行dispatch函数，在着之前的for循环的作用？
需要知道actions是什么，但是函数中并没有actions这个值，在这里使用了闭包
class ViewSetMixin(object): def as_view(cls, actions=None, **initkwargs): def view(request, *args, **kwargs): for method, action in actions.items():pass
在django启动时，执行as_view时传的有参数，
views.AuthorsModelView.as_view({"get": "list", "post": "create"})
在执行as_view时，默认参数actions接收到了{"get": "list", "post": "create"}，在执行view时，使用这些值，不同的url执行actions接收值不同，
在执行view时也不同
for method, action in actions.items(): handler = getattr(self, action) setattr(self, method, handler)
method的值就是"get"，"post",action为"list","create"
handeler的值为self.list/self.create
setattr重新赋值，如setattr(self, "get",self.list)等同于再进行getattr(self,"get")
AuthorsModelView，ModelViewSet，GenericViewSet，GenericAPIView
均无dispatch方法，在APIView中有dispatch方法
class APIView(View): def dispatch(self, request, *args, **kwargs): request = self.initialize_request(request, *args, **kwargs) self.request = request if request.method.lower() in self.http_method_names: handler = getattr(self, request.method.lower(), self.http_method_not_allowed) else: handler = self.http_method_not_allowed response = handler(request, *args, **kwargs) return self.response
执行APIView中的dispatch方法：
handler = getattr(self, request.method.lower(),self.http_method_not_allowed)
执行反射时，如果发来的请求get，此时handler不再是self.get,而是self.list.是因为在执行ViewSetMixin中的view方法时
setattr(self, method, handler)重新赋值了
执行handler函数，response=self.list(request, *args, **kwargs),去AuthorsModelView中list方法
class ListModelMixin(object): def list(self, request, *args, **kwargs): queryset = self.filter_queryset(self.get_queryset()) page = self.paginate_queryset(queryset) if page is not None: serializer = self.get_serializer(page, many=True) return self.get_paginated_response(serializer.data) serializer = self.get_serializer(queryset, many=True) return Response(serializer.data)
handler执行后的结果返回给response，dispatch函数将response返回给view，view在页面上显示出来标签：校验 enter first ram nat spl turn nbsp 父类
原文地址：https://www.cnblogs.com/zgf-666/p/9206367.html
