DRF - 序列化之自定义校验规则

views.py：

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# 自定义规则 class TestValidator(object):     def __init__(self, base):         self.base = base       def __call__(self, value):         # 规则明细         if not value.startswith(self.base):             message = "内容必须以 %s 为开头" % self.base             raise serializers.ValidationError(message)       def set_context(self, serializer_field):         """         This hook is called by the serializer instance,         prior to the validation call being made.         """         # 执行验证之前调用，serializer_fields 是当前字段对象         pass     class UserGroupSerializer(serializers.Serializer):     title = serializers.CharField(         error_messages={"blank": "内容不能为空"},         validators=[TestValidator("AAAAA"),],  # 设置规则     )     class UserGroupView(APIView):     def post(self, request, *args, **kwargs):         ser = UserGroupSerializer(data=request.data)         if ser.is_valid():  # 如果 ser 有数据             print(ser.validated_data["title"])         else:             print(ser.errors)  # 如果没数据，则打印错误信息         return HttpResponse("ok")

提交不合规定的数据：