Django 序列化程序字段不起作用

Question

虽然我查看了提出的问题，但我没有找到解决方案...

当我使用这个序列化器时：

class MessageSerializer(ModelSerializer):
    sender = UserMobileSerializer(read_only=True)

    class Meta:
        model = Messages
        fields = '__all__'

我得到这样的东西：

{
    "id": 62,
    "sender": {
        "pk": 12,
        "email": "john@gmail.com",
        "full_name": "John",
        "profile_photo": null
    },
    "created_at": "2018-04-29T00:54:50.437662",
    "message": "sdkjnasljdhkajsjdlasdasda",
    "read_at": false,
    "target": 18
}

我希望target 字段类似于sender，即：显示完整的用户信息，而不仅仅是ID。

我尝试添加这一行：target = UserMobileSerializer()，但我仍然只得到输出中的 ID。我也尝试了target = UserMobileSerializer(read_only=True)，但没有任何改变。

Answer 1

您没有将定义的字段添加到序列化程序的Meta 中的fields。试试这个：

class MessageSerializer(ModelSerializer):
    sender = UserMobileSerializer(read_only=True)

    class Meta:
        model = Messages
        fields = ('your', 'fields', 'sender')

编辑：您也需要序列化 ​​target。像这样：

class TargetSerializer(ModelSerializer):
    class Meta:
        model = Target
        fields = ('id', 'title')  # Add fields you want to get in the response.


class MessageSerializer(ModelSerializer):
    target = TargetSerializer(read_only=True)  # You should have TargetSerializer defined
    sender = UserMobileSerializer(read_only=True)

    class Meta:
        model = Messages
        fields = ('your', 'fields', 'target', 'sender')