Django REST_framework Quickstart

局部避免crsf的方式

针对视图函数：

from django.views.decorators.csrf import csrf_exempt
@csrf_exempt
def foo(request):
    return HttpResponse("foo")

针对CBV：

# 方式1  在类上方使用
@method_decorator(csrf_exempt,name="dispatch")
class IndexView(View):
    # 方式2  在类的 dispatch 方法上使用 @csrf_exempt
    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
    print("hello world")
    # 执行父类的dispatch方法
        res=super(IndexView,self).dispatch(request, *args, **kwargs)
        print("hello boy")
        return res
                    

在url中配置：

from django.views.decorators.csrf import csrf_exempt

urlpatterns = [
    url(r'^myview/$', csrf_exempt(views.MyView.as_view()), name='myview'),
]

rest_framework的简单示例

以books为例：

(1)创建表，数据迁移
(2)创建表序列化类BookSerializer
class BookSerializer(serializers.HyperlinkedModelSerializer):
	class Meta:
		model=Book
		fields="__all__"

(3)创建视图类：
  class BookViewSet(viewsets.ModelViewSet):
		queryset = Book.objects.all()
		serializer_class = BookSerializer

(4) 设计url：
 router.register(r'books', views.BookViewSet)

APIview

from rest_framework.views import APIView

class APIView(View):
    def as_view():
        view = super(APIView, cls).as_view(**initkwargs)  #  self.dispatch

    def dispatch():
         # 重新封装request
         request = self.initialize_request(request, *args, **kwargs)
         self.request = request

        # 初始化操作
        self.initial(request, *args, **kwargs)

        if request.method.lower() in self.http_method_names: 
　　　　　　　# http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace']
            handler = getattr(self, request.method.lower(),self.http_method_not_allowed)  
　　　　　　　# handler=self.get
            response = handler(request, *args, **kwargs)   # self.get(request, *args, **kwargs)

1 CBV :
    as_view
    dispatch

2 掌握API源码流程：
    as_view
    dispatch

3 serializers组件