include in sequelize(node.js express)中使用models.sequelize.col()出现歧义错误

Question

mariadb,

show tables;
Board
Comment

我的代码，

models.Board.findAll({
attributes: [
  '_no', 'title', 'content', 'createdAt'
],
include: [
  {
    model: models.Comment,
    tableAlias: 'Comment',
    attributes: [
      [models.sequelize.fn('count', models.sequelize.col('_no')), 'comment']
    ]
  }
],
group: ['_no', 'title', 'content', 'createdAt'],
order: [
  ['createdAt', 'DESC']
],
    raw: true
   }).then(function(boards)

     {
         res.send(JSON.stringify(boards));

      });

为什么会出错？

Unhandled rejection SequelizeDatabaseError: ER_NON_UNIQ_ERROR: Column '_no' in field list is ambiguous

models.sequelize.col('_no') -> models.sequelize.col('models.Comment._no') 也有错误。

models.sequelize.col('_no')在_no中想使用评论table.

谢谢。

Answer 1

似乎 Board 和 Comment 都有一个 _no 栏？在这种情况下，您需要指定要计数的那个，fx: models.sequelize.col('board._no'))（确保 table 名称与查询其余部分中 table 的复数形式和大写形式相匹配）

include in sequelize(node.js express)中使用models.sequelize.col()出现歧义错误

The ambiguous error occurs while using the models.sequelize.col () in the include in sequelize(node.js express)

join

include

mariadb

sequelize.js