javascript - mongodb怎么设置用户的账户不重复？

Question

用户注册有两个属性name和address，怎么设置数据库让这两个属性对应相等而不发生重复。
我的意思就是不希望出现一个address对应多个用户名

谢谢

Answer 1

If I understand correctly, create a unique matching index:

.createIndex( { name: 1, address: 1 }, { unique: true } )

It is recommended to check the official MongoDB manual to improve work efficiency.

Love MongoDB, Have Fun!

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Answer 2

var studentSchema = new Schema({
  school:String,
  nickname:String,
  username:{
    type:String,
    unique:true
  },.....
}

Mine schema is like that, you can try the following and see if it works

name:{
type:String,
unique:true
},
address:{
type:String,
unique:true
}