- request. method 的时候- - - 》实际上 request. _request. 'method' - - - 》反射出来的- 这个类from rest_framework. request import Request没有method，他会触发这个类的__getattr__- - - 》request. _request视图类的方法中： self 是咱们写的视图类的对象，self. request 是新的request
前端传入的编码: urlencoded, josn, form- data
class BookView ( APIView) : parser_classes = [ JSONParser] REST_FRAMEWORK = { 'DEFAULT_PARSER_CLASSES' : [ 'rest_framework.parsers.JSONParser' , 'rest_framework.parsers.FormParser' , ]
}
REST_FRAMEWORK = { 'DEFAULT_PARSER_CLASSES' : [ 'rest_framework.parsers.JSONParser' , 'rest_framework.parsers.FormParser' , 'rest_framework.parsers.MultiPartParser' ] , 'DEFAULT_RENDERER_CLASSES' : [ 'rest_framework.renderers.JSONRenderer' , 'rest_framework.renderers.BrowsableAPIRenderer' , ] ,
}
class BookView ( APIView) : parser_classes = [ MultiPartParser] - drf自己有默认配置- - - 》默认配置就是支持三种
from rest_framework. views import APIView
from rest_framework. response import Response
from rest_framework. parsers import JSONParser, FormParser, MultiPartParser
from rest_framework. renderers import JSONRenderer, BrowsableAPIRenderer
class BookView ( APIView) : '''# 方式二：编码格式全局使用,以及浏览器和postman的响应编码格式REST_FRAMEWORK = {# 全局配置编码格式'DEFAULT_PARSER_CLASSES': ['rest_framework.parsers.JSONParser','rest_framework.parsers.FormParser','rest_framework.parsers.MultiPartParser'],# 全局配置响应编码格式'DEFAULT_RENDERER_CLASSES': ['rest_framework.renderers.JSONRenderer','rest_framework.renderers.BrowsableAPIRenderer',],}''' parser_classes = [ JSONParser, FormParser, MultiPartParser] renderer_classes = [ JSONRenderer, BrowsableAPIRenderer] def get ( self, request) : print ( self. request is request) print ( self. headers) '''def __init__(self, data=None, status=None, template_name=None, headers=None,exception=False, content_type=None):data=None # 字符串，列表，字典------> 放在了响应体中------>它是__init__()的第一个参数status=None # 这是http响应状态码，默认是200，不能使用status=100，这表示请求正在处理template_name=None # 模板名字默认是：rest_framework/api.html 可以定制自己返回的页面headers=None # http响应头，后期我们往响应头中放数据exception=False content_type=None # 响应编码格式 ''' res = Response( data= { } , status= 200 , headers= { 'xxx' : 'yyyy' } ) print ( res. data) print ( res. has_header( 'xxx' ) ) return resdef post ( self, request) : print ( request. data) return Response( '新增' )
data= None
status= None ,
headers= None , content_type= None
template_name= None
res= Response( data= { } , status= 500 , headers= { 'xxx' : 'yyy' } )
print ( res. data)
return res
res. headers 拿不到数据，可以通过下面的方式或得到
print ( res[ 'xxx' ] )
print ( res. has_header( 'zzz' ) )
class BookView ( APIView) : renderer_classes = [ BrowsableAPIRenderer]
REST_FRAMEWORK = { 'DEFAULT_RENDERER_CLASSES' : [ 'rest_framework.renderers.JSONRenderer' , 'rest_framework.renderers.BrowsableAPIRenderer' , ] ,
}
class BookView ( APIView) : renderer_classes = [ BrowsableAPIRenderer] - 解析：三种编码都能解析- 响应：浏览器访问看到浏览器的样子，postman访问，看到json格式
class BookView ( APIView) : def get ( self, request) : book_list = Book. objects. all ( ) ser = BookSerializer( instance= book_list, many= True ) return Response( ser. data) def post ( self, request) : ser = BookSerializer( data= request. data) if ser. is_valid( ) : ser. save( ) return Response( ser. data) else : return Response( ser. errors) class BookDetailView ( APIView) : def get ( self, request, pk) : book = Book. objects. filter ( pk= pk) . first( ) ser = BookSerializer( instance= book) return Response( ser. data) def put ( self, request, pk) : book = Book. objects. filter ( pk= pk) . first( ) ser = BookSerializer( instance= book, data= request. data) if ser. is_valid( ) : ser. save( ) return Response( ser. data) else : return Response( ser. errors) def delete ( self, request, pk) : Book. objects. filter ( pk= pk) . delete( ) return Response( '' )
class GenericAPIView ( APIView) : queryset = None serializer_class = None def get_queryset ( self) : return self. queryset. all ( ) def get_serializer ( self, * args, ** kwargs) : return self. serializer_class( * args, ** kwargs) def get_object ( self, pk) : res = self. get_queryset( ) return res. filter ( pk= pk) . first( )
- queryset：以后放所有某个表查询出的数据- serializer_class：要序列化的类- get_queryset : 要序列化的所有数据，qs对象- get_serializer ：序列化类- get_object ：修改，查询的单条- lookup_field = 'pk' 路由使用转换器，转换出来的参数，查询单条要用到，如果改了，路由对应也要修改，一般不改- filter_backends：后面详细讲 过滤 功能- pagination_class ：后面详细讲 分页- get_serializer_class 后期咱们可能会重写它，指定某些方法使用不同的序列化类- filter_queryset 后面跟过滤功能一起讲class PublishView ( GenericAPIView) : queryset = Publish. objects. all ( ) serializer_class = PublishSerializerdef get ( self, request) : obj_list = self. get_queryset( ) ser = self. get_serializer( instance= obj_list, many= True ) return Response( ser. data) def post ( self, request) : ser = self. get_serializer( data= request. data) if ser. is_valid( ) : ser. save( ) return Response( ser. data) else : return Response( ser. errors) class PublishDetailView ( GenericAPIView) : serializer_class = PublishSerializerqueryset = Publish. objects. all ( ) def get ( self, request, pk) : obj = self. get_object( ) ser = self. get_serializer( instance= obj) return Response( ser. data) def put ( self, request, pk) : obj = self. get_object( ) ser = self. get_serializer( instance= obj, data= request. data) if ser. is_valid( ) : ser. save( ) return Response( ser. data) else : return Response( ser. errors) def delete ( self, request, pk) : self. get_object( ) . delete( ) return Response( '' )
def get_queryset ( self) : return self. queryset. all ( )
class PublishView ( GenericAPIView, ListModelMixin, CreateModelMixin) : queryset = Publish. objects. all ( ) serializer_class = PublishSerializerdef get ( self, request) : return self. list ( request) def post ( self, request) : return super ( ) . create( request) class PublishDetailView ( GenericAPIView, RetrieveModelMixin, UpdateModelMixin, DestroyModelMixin) : serializer_class = PublishSerializerqueryset = Publish. objects. all ( ) def get ( self, request, pk) : return self. retrieve( request, pk) def put ( self, request, pk) : return self. update( request, pk) def delete ( self, request, pk) : return self. destroy( request, pk)
from django. http import HttpResponsedef custom_header_view ( request) : response = HttpResponse( "This is a custom header example" ) response[ 'X-Custom-Header' ] = 'Hello, World!' return response总结：首先创建了一个 HttpResponse 对象，并设置了响应的内容。然后，
通过 response[ 'Header-Name' ] 的方式向响应头添加自定义的响应头信息。
在这里，我们添加了一个名为 "X-Custom-Header" 的自定义头，其值为 "Hello, World!" 。
最后，将 HttpResponse 对象返回，以便将其发送给客户端。
这样，客户端将会接收到包含自定义响应头信息的响应。
