Django序列化报错：ThreadSerializer缺少Meta.model属性求解

搭建移动端论坛后端，使用Postman测试API接口时触发错误：ThreadSerializer类缺少"Meta.model"属性。

原Serializer代码 #

from rest_framework import serializers
from forum.models import Thread
from forum.models import Post

class ThreadSerializer(serializers.ModelSerializer):
    class Meta:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
        Thread_Model = Thread
        Thread_Fields = ['id', 'thread_id', 'title', 'desc', 'created_at']


class PostSerializer(serializers.ModelSerializer):
    class Meta:
        Post_Model = Post
        Post_Fields = ['id', 'post_id', 'post_content', 'post_time', 'thread_id']

原Model代码 #

from django.db import models
from django.conf import settings
from Authentication.models import User
# Create your models here.
class Thread(models.Model):
    userid = models.ForeignKey(User, on_delete=models.CASCADE)
    thread_id = models.AutoField(primary_key=True)
    title = models.CharField(max_length=100)
    desc = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)
    

class Post(models.Model):
    userid = models.ForeignKey(User, on_delete=models.CASCADE)
    thread_id = models.ForeignKey(Thread, on_delete=models.CASCADE)
    post_id = models.AutoField(primary_key=True)
    post_content = models.TextField()
    post_time = models.DateTimeField(auto_now_add=True)

错误核心是Serializer的Meta类属性命名不符合DRF规范：DRF规定ModelSerializer的Meta类必须用model指定关联模型，用fields指定序列化字段，你自定义的Thread_Model、Thread_Fields等命名无法被框架识别，因此触发"缺少Meta.model"的错误。

修改后的Serializer代码如下：

from rest_framework import serializers
from forum.models import Thread
from forum.models import Post

class ThreadSerializer(serializers.ModelSerializer):
    class Meta:
        model = Thread  # 修正属性名
        fields = ['id', 'thread_id', 'title', 'desc', 'created_at']  # 修正属性名


class PostSerializer(serializers.ModelSerializer):
    class Meta:
        model = Post  # 修正属性名
        fields = ['id', 'post_id', 'post_content', 'post_time', 'thread_id']  # 修正属性名

修改后重新测试API即可解决该问题。

内容的提问来源于stack exchange，提问作者Vincent