CBV到DRF源码分析

安装

pip3 install djangorestframework

使用

• 注册app

  INSTALLED_APPS = [
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'rest_framework'
  ]
  

• 写路由

  from django.conf.urls import url
  from django.contrib import admin
  from api import views
  
  urlpatterns = [
      url(r'^drf/info/', views.DrfInfoView.as_view()),
  ]
  
  

• 写视图

  from rest_framework.views import APIView
  from rest_framework.response import Response
  
  class DrfInfoView(APIView):
  
      def get(self,request,*args,**kwargs):
          data = [
              {'id': 1, 'title': '震惊了...王阳居然...', 'content': '...'},
              {'id': 2, 'title': '震惊了...王阳居然...', 'content': '...'},
              {'id': 3, 'title': '震惊了...王阳居然...', 'content': '...'},
              {'id': 4, 'title': '震惊了...王阳居然...', 'content': '...'},
          ]
          return Response(data)
  

DRF的应用场景

以后在公司参与前后端分离项目、参与为app写接口时，用drf会比较方便。

CBV到视图函数源码分析

1.首先注册，写好url，视图

首先下载并安装好djangorestframework

pip3 install djangorestframework

在settings中注册

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework'
]

写路由

from django.conf.urls import url
from django.contrib import admin
from api import views

urlpatterns = [
    url(r'^drf/info/', views.DrfInfoView.as_view()),
]

写视图

from rest_framework.views import APIView
from rest_framework.response import Response

class DrfInfoView(APIView):

    def get(self,request,*args,**kwargs):
        data = [
            {'id': 1, 'title': '震惊了...王阳居然...', 'content': '...'},
            {'id': 2, 'title': '震惊了...王阳居然...', 'content': '...'},
            {'id': 3, 'title': '震惊了...王阳居然...', 'content': '...'},
            {'id': 4, 'title': '震惊了...王阳居然...', 'content': '...'},
        ]
        return Response(data)

2.CBV到视图函数源码分析

• 第一步

urlpatterns = [
    url(r'^drf/info/', views.DrfInfoView.as_view()),
]
请求进来首先执行as_view()

• 第二步

然后执行父类的as_view()方法，并赋值给view

• 第三步

执行self.dispatch方法，首先取本类DrfInfoView中找，如果没有就找父类APIView中找