DRF之request，路由

1.request
1. request.data
    post请求内的数据都放在了request.data

2.request.query_parme
    get 请求内携带的参数都放在了request.query_parms

3. request.FILES
        def FILES(self):
        # Leave this one alone for backwards compat with Django's request.FILES
        # Different from the other two cases, which are not valid property
        # names on the WSGIRequest class.
        if not _hasattr(self, '_files'):
            self._load_data_and_files()
        return self._files
4.APIView分析
    4.1 as_view  方法分析
    4.2 dispatch  方法分析
    4.3 initialize_request 方法分析
    4，4 initial      方法分析
2. 路由

DRF之路由
在urls.py 配置路由

    1.正常的
    路由分发
    import user
    import home
    urlpatterns = [
        path('admin/', admin.site.urls),
        path('user/',include('user.urls')),
        path('home/',include('home.urls')),
        path('course/',include('course.urls')),
        #  meida路由

    2.继承了viewMixin
        用过滤器怎么写呢。

    3.继承了ModelViewSet
        from rest_framework.routers import DefaultRouter
        from rest_framework.routers import DefaultRouter,SimpleRouter
        bookrouter=DefaultRouter()
        bookrouter.register('books',views.BookModelViewSet)
        urlpatterns = [
            path('admin/', admin.site.urls),
        ]
        urlpatterns+=bookrouter.urls
　　　如果不想用pk 更改GenericAPIView的这个属性   lookup_field = 'pk'

action的使用

action的使用
    为了给继承自modelViewset的视图类中定义的函数也添加路由
    @action(methods=['get','POST'],detail=False)
    #  method
    #  true 表示生成带pk的地址
    @action(methods=['get'],detail=False)
    生成的路由
    <URLPattern '^books/get_1/$' [name='book-get-1']>

    @action(methods=['get'],detail=True)
    <URLPattern '^books/(?P<pk>[^/.]+)/get_1/$' [name='book-get-1']>
    http://127.0.0.1:8000/books/pk=1/get_1/

　视图类的写法

@action(methods=['get','post'],detail=True)
    def get_1(self,request,*args,**kwargs):
        print('get')
        book=self.get_queryset()[:2]
        ser=self.get_serializer(book,many=True)