路由组件

基本使用

1.ViewSetMixin 介绍

特点，只要继承它，路由写法变了

eg:
   path('books/', views.BookView.as_view({'get': 'list', 'post': 'create'})),

ViewSetMixin 源码分析

""" 如果请求来了，会执行 view(request)"""

class ViewSetMixin:
    @classonlymethod
    def as_view(cls, actions=None, **initkwargs):
        # actions={'get': 'list', 'post': 'create'}
        def view(request, *args, **kwargs):
            #   method:get      action:list
            for method, action in actions.items():
                # handler就是list
                handler = getattr(self, action) #视图类反射有没有list
                # 反射：把get变成了list
                setattr(self, method, handler)
            return self.dispatch(request, *args, **kwargs)
        return csrf_exempt(view)

2.代码展示

（1）模型层

"""必须先继承 ViewSetMixin, 后继承 APIView """

from rest_framework.views import APIView		# 导入
from rest_framework.viewsets import ViewSetMixin	# 导入

from rest_framework.decorators import action		# 装饰器 action 导入


class PublishView(ViewSetMixin, APIView):


""" 方式一: """
    # detail=False  路由中不带pk
    # url_path ：如果不写，就是函数名生成的路径 ==> http://127.0.0.1/publish/lqzqqq
    # 如果写了 ==> ==> http://127.0.0.1/publish/lqz
    # 浏览器映射为===> ^publish/lqz/$ [name='publish-lqz'] === http://127.0.0.1/publish/lqz
    # url_path 做反向解析，一般不用写。

    @action(methods=['POST', 'GET'], detail=False, url_path='lqz', url_name='lqz')
    def lqzqqq(self, request):
        return Response('lqz')


"""方式二: """
    # detail=True 方法中的PK必须传
    # 浏览器映射为===> ^publish/(?P<pk>[^/.]+)/lqz/$ [name='publish-lqz'] === http://127.0.0.1/publish/pk/lqz ===  http://127.0.0.1/publish/5/lqz
    @action(methods=['POST', 'GET'], detail=True, url_path='lqz', url_name='lqz')
    def lqzqqq(self, request, pk):
        print(pk)
        return Response('lqz')


    def login(self, request):
        return Response('login')

2.路由层

from rest_framework.routers import SimpleRouter, DefaultRouter

# 也可以 DefaultRouter() 实例化，两者大差不差。
router = SimpleRouter()

router.register('books', views.BookView, 'books')
router.register('publish', views.PublishView, 'publish')

urlpatterns = [

]

""" 访问路由 """
    http://127.0.0.1/publish/lqz

(1) 路由注册

方式一：

# 在最下面注册
urlpatterns+=router.urls

方式二：

# 在最下面注册
urlpatterns = [
    # ''中无需写字段（也可以写）。
    path('', include(router.urls)),
]