如何确保唯一的电子邮件，userName将使用Mongoose进入MongoDB

Question

db.UserSchema = new db.Schema({   
    userName: {type:String,
        unique:true,
        required:true,index:true},
    emailId: {type:String,
        unique:true,
        required:true,index:true},
    password: {type:String,
        required:true},
    contactNumber: String,
    region: String,
    isActive:Boolean,
    lastLoginDateTime:Date
});

上面是我想要放入MongoDB的架构，但是email和userName应该是唯一的，我无法做到这一点。

Answer 1

我试过这种方式并且有效

db.UserSchema = new db.Schema({ userName: {type: String, index: {unique: true, dropDups: true}}, emailId: {type: String, index: {unique: true, dropDups: true}}, password: {type:String, required:true}, contactNumber: String, region: String, isActive:Boolean, lastLoginDateTime:Date });