Question

我有一个API端点，它以下列格式请求数据： -

{
  "platform": "value",
  "username": "value",
  "login_type": "value"
}

现在，我有一个模特： -

class ModelA(models.Model):
    field1 = models.IntegerField()

请求变量不是模型的一部分，因此我创建了以下序列化器： -

class ModelASerializer(serializers.ModelSerializer):
    username = serializers.CharField()
    login_type = serializers.IntegerField()
    platform = serializers.ChoiceField(choices=User.PLATFORM_CHOICES)

    def create(self, data):
        platform, username = data.get('platform'), data.get('username')
        login_type = data.get('login_type')
        ###### some processing based on above input
        instance = ModelA.objects.create(field1=11111)
        return instance

    class Meta:
        model = ModelA
        fields = ('username', 'login_type', 'platform')
        read_only_fields = ('field1', )

当我POST数据时，返回的错误是

The serializer field might be named incorrectly and not match any attribute or key on the `ModelA` instance.
Original exception text was: 'ModelA' object has no attribute 'username'.

我理解它会尝试get_attr来自实例对象的fields。如何在INPUT请求不同（即与模型字段无关）并且响应不同（即与模型字段相关）时发回响应？

Answer 1

我将上述问题设置字段解析为write_only = True。

class ModelASerializer(serializers.ModelSerializer):
    username = serializers.CharField(write_only = True)
    login_type = serializers.IntegerField(write_only = True)
    platform = serializers.ChoiceField(choices=User.PLATFORM_CHOICES, write_only = True)

Django DRF - 不同的请求和响应序列化

1 个答案: