Django Restframework.2

APIView

• Inherited from View

• Entry function

• as_view

  • queryset detection

    • Do not directly operate queryset, direct operation between a plurality of data requests disorder occurs

    • Recommended for all or get_queryset

  • Call the parent class as_view

    • Parameter detection

    • Defines the closure function

    • Record data

    • dispatch

• dispatch

• Overriding methods

• Request made a conversion (initialization)

• After initializing the whole

  • Formatting suffix

  • Content Decision

  • Decision version

    • Mandatory upgrade

    • Recommended upgrade

    • No upgrade

  • Perform authentication

  • Check permissions

  • Throttling, limiting

• The method for distribution request

• If the above process to qualify abnormalities, abnormal and not directly throw, the exception will be caught

• Provide policy exception

• The final response unified process

• Finally, return

generics

• GenericsAPIView (most common)

  • inherit

    • APIView

  • Attributes

    • filter_backends

    • lookup_field

    • lookup_url_kwarg

    • pagination_class

    • queryset

    • serializer_class

  • method

    • get_queryset

    • get_object

    • get_serializer

    • get_serializer_class

    • get_serializer_context

    • filter_queryset

    • paginator

      • Using property modified

    • paginate_queryset

    • get_paginated_response

• CreateAPIView

  • inherit

    • GenericAPIView

    • CreateModelMixin

  • method

    • post

      • create

• ListAPIView

  • inherit

    • GenericAPIView

    • ListModelMixin

  • method

    • get

      • list

• RetrieveAPIView

  • inherit

    • GenericAPIView

    • RetrieveModelMixin

  • method

    • get

      • retrieve

• DestroyAPIView

  • inherit

    • GenericAPIView

    • DestroyModelMixin

  • method

    • delete

      • destroy

• UpdateAPIView

  • inherit

    • GenericAPIView

    • UpdateModelMixin

  • method

    • put

      • update

    • patch

      • partial_update

• ListCreateAPIView

  • inherit

    • GenericAPIView

    • ListModelMixin

    • CreateModelMixin

  • method

    • post

      • create

    • get

      • list

• RetrieveUpdateAPIView

  • inherit

    • GenericAPIView

    • RetrieveModelMixin

    • UpdateModelMixin

  • method

    • get

      • retrieve

    • put

      • update

    • patch

      • partial_update

• RetrieveDestroyAPIView

  • inherit

    • GenericAPIView

    • RetrieveModelMixin

    • DestroyModelMixin

  • method

    • get

      • retrieve

    • delete

      • destroy

• RetrieveUpdateDestroyAPIView

• inherit

  • GenericAPIView

  • RetrieveModelMixin

  • UpdateModelMixin

  • DestroyModelMixin

• method

• get

  • retrieve

• put

  • update

• patch

  • partial_update

• delete

• destroy

mixins

• CreateModelMixin

  • function

    • create

    • perform_create

    • get_success_headers

• ListModelMixin (plural)

  • function

    • list

• RetrieveModelMixin （单数）

  • function

    • retrieve

• UpdateModelMixin （单数）

  • function

    • update

    • perform_update

    • partial_update

• DestroyModelMixin （单数）

• function

• destroy

• perform_destroy

Usage (simple registration login)

• Create a model

class User(models.Model):

    u_name = models.CharField(max_length=32, unique=True)
    u_password = models.CharField(max_length=256)

    @classmethod
    def get_user(cls, u_name):
        try:
            user = User.objects.get(u_name=u_name)
            return user
        except Exception as e:
            print(e)

    def check_password(self, password):
        return self.u_password == password

• Generated migration file
• Create a serializer

class UserSerializer(serializers.ModelSerializer):

    class Meta:
        model = User
        fields = ("id", "u_name", "u_password")

 

• Create a route

urlpatterns = [ 
    url (r ' ^ users / ' , views.UsersAPIView.as_view ()) 
]

• Create a view class

class UsersAPIView(CreateAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer

    def post(self, request, *args, **kwargs):
        action = request.query_params.get("action")

        if action == "register":
            return self.do_register(request, *args, **kwargs)
        elif action == "login":
            return self.do_login(request, *args, **kwargs)
        else:
            raise APIException(detail="please supply correct action [register, login]")

    def do_register(self, request, *args, **kwargs):

        print(type(request))
        print(type(self))

        return self.create(request, *args, **kwargs)

    def do_login(self, request, *args, **kwargs):
        u_name = request.data.get("u_name")
        u_password = request.data.get("u_password")

        user = User.get_user(u_name)

        if not user:
            raise APIException(detail="用户不存在")

        if not user.check_password(u_password):
            raise APIException(detail="密码错误")

        token = uuid.uuid4().hex

        # 存token

        data = {
            "msg": "ok",
            "status": HTTP_200_OK,
            "token": token
        }

        return Response(data)