python DRF获取参数介绍

Posted 2021-01-16

DRF获取参数的方式

例如url
url(r‘^demo/(?P<word>.*)/$‘, DemoView.as_view())
在类视图中获取参数
url:http://127.0.0.1:8000/demo/aaa/?bbb=bbb&ccc=ccc&ccc=CCC
form:{"body":"body"}
JSON:{"body":"body"}
class DemoView(APIView):

    def post(self, request, aaa):
        aaa = aaa  # 获取url路径中的参数
        bbb_str = request.query_params.get(‘bbb‘)  # 获取一个查询字符串的参数
        ccc_list = request.query_params.getlist(‘ccc‘)  # 获取多个查询字符串参数
        # 请求体中的参数
        # 如果通过form表单传递,获取出来是QueryDict,通过.dict()转换成python的字典
        form_body = request.data
        # 如果通过JSON传递,获取出来就是字典,例如{‘body‘:‘body‘}
        # json_body = request.data
        print(aaa)
        print(bbb_str)
        print(ccc_list)
        print(form_body.dict())
        # print(json_body)
        return Response({‘message‘: ‘OK‘})
结果
aaa
bbb
[‘ccc‘, ‘CCC‘]
{‘body‘: ‘body‘}
URL路径参数/查询字符串不区分请求方式,GET/POST/PUT等都一样
serializer中获取参数
# view
class DemoView(GenericAPIView):
    serializer_class = DemoSerializer

    def post(self, request, aaa):
        serializer = self.get_serializer(data=request.query_params)
        serializer.is_valid(raise_exception=True)
        return Response({‘message‘: ‘OK‘})

# serializer
class DemoSerializer(serializers.Serializer):
    bbb = serializers.CharField()
    ccc = serializers.ListField()  # List

    def validate(self, attrs):
        aaa = self.context[‘view‘].kwargs.get(‘aaa‘)  # 获取路径参数
        bbb = attrs[‘bbb‘]  # 获取查询字符串
        ccc = attrs[‘ccc‘]  # 获取以多个key相同的查询字符串
        # 获取当前登陆的对象,需要根据场景进行使用
        # user = self.context[‘request‘].user
        print(aaa)
        print(bbb)
        print(ccc)
        return attrs