Two ways to exclude and filter a certain field during mongodb database mongoose query

Take filtering out the password field as an example

1. password:0

User.findOne({username, password: md5(password)}, {password:0}, function (err, user)
{
 //处理逻辑
})

2. select:false

Directly when defining the schema rules, it is stipulated that the password will not be returned in the query

var userSchema = new mongoose.Schema({
    username: {
        type:String,
        required:true,
        minlength:2,
        maxlength:20
      },
    password: {
            type:String,
            required:true,
            select:false
          },
   
    })