错误复现

serializers.py

class LoginSerializer(serializers.Serializer):username = serializers.CharField(min_length=5, max_length=10, help_text="账号")password = serializers.CharField(min_length=5, max_length=10, help_text="密码")# 校验用户名def validate_username(self, value):if not re.match(r'^[a-zA-Z0-9_-]{5,10}$', value):raise serializers.ValidationError("请输入5-20的用户名！")# 校验密码def validate_password(self, value):if not re.match(r'^[a-zA-Z0-9_-]{6,10}$', value):raise serializers.ValidationError("请输入6-20的密码！")

view.py

class LoginGenericAPIView(GenericAPIView):queryset = User.objects.all()serializer_class = LoginSerializerpermission_classes = [AllowAny]def post(self, request):# 获取序列化器serializer = self.get_serializer(data=request.data)print(request.data)# 验证数据if not serializer.is_valid():return Response(serializer.errors)print(serializer)print(serializer.data)return Response(serializer.data)

错误

请求可以获取到value但是验证完毕数据一直为None

解决方案

一定不要像我一样粗心

validate_<field_name>验证完毕没有返回Value

正确的代码

class LoginSerializer(serializers.Serializer):username = serializers.CharField(min_length=5, max_length=10, help_text="账号")password = serializers.CharField(min_length=5, max_length=10, help_text="密码")# 校验用户名def validate_username(self, value):if not re.match(r'^[a-zA-Z0-9_-]{5,10}$', value):raise serializers.ValidationError("请输入5-20的用户名！")return value# 校验密码def validate_password(self, value):if not re.match(r'^[a-zA-Z0-9_-]{6,10}$', value):raise serializers.ValidationError("请输入6-20的密码！")return value