node.js - Sequelize，检查行是否存在并返回 bool 值

Question

请帮忙

我如何实现一个请求“SELECT EXISTS(SELECT 1 FROM Followers WHERE follower_id = 100);”通过 Sequelize 并将结果显示在单独的字段中？

像这样的东西

await Followers.findAll({
  where: { user_id: userId },
  include: [
     {
      model: Followers,
      as: 'isSubscribed',
      ...
      },
    },
  ]

Answer 1

做类似的事情

let followersCount = Followers.count({ where: {follower_id: 100} })

if(followersCount > 0){
  //EXISTS, Do Something
}
else{
   //Does not exist
 }