Sequelize：类型错误：无法读取未定义的属性“_modelAttribute”

Question

我试图按关联模型的计数进行排序，并且从 Sequelize 收到以下错误

无法读取未定义的属性“_modelAttribute”

我有以下代码：

db.user.belongsToMany(db.user, {
  as: "User",
  through: "UserFollowers",
  foreignKey: "user_id"
});
db.user.belongsToMany(db.user, {
  as: "Follower",
  through: "UserFollowers",
  foreignKey: "follower_id"
});

和

   User.findAll({
          attributes:["username",db.sequelize.literal('(SELECT COUNT(*) FROM "public"."Users","public"."UserFollowers" WHERE "Users".user_id = "UserFollowers".user_id GROUP BY "Users".user_id)'),'followercount'],
          include:[{model:User,as:'Follower'}],
          order:[{ model: User, as: 'Follower' }[db.sequelize.literal('followercount')],'DESC']
      }).then(users => {
          res.json(users)
      })

我很感激任何帮助！

Answer 1

从代码看，问题似乎出在排序条款上。将其更改为：

order: [[{ model: User, as: 'Follower' }, 'followercount', 'DESC']]

如果这还不能解决问题，请尝试通过添加 来记录查询的结果logging: console.log。这应该可以帮助您通过分析 sql 查询来确定哪个部分出现故障。