javascript - Sequelize : TypeError: Cannot read property '_modelAttribute' of undefined

Question

我正在尝试按关联模型的计数进行排序，但从 Sequelize 收到以下错误

Cannot read property '_modelAttribute' of undefined

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)
      })

感谢您的帮助!

Answer 1

从代码上看，问题似乎出在排序子句上。 将其更改为:

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

如果这不能解决问题，请尝试通过添加 logging: console.log 来记录查询结果。这应该可以帮助您通过分析 sql 查询来确定失败的部分。