猫鼬到期

Question

I have the below schema:

ip: String,
port: Number,
msgboard: [{
   date: {
        type: Date,
        default: Date.now,
        expires: 120
        },
   msg: String
}]

I want the messages to be removed automatically after 120s from creation. But the above delete's the whole document and not just that subdoc from msgboard. I have been doing it using cron and running a function, but the code seems too untidy. Is there any inbuilt way ?

Answer 1

I think you should try this, its working. I have created two schemas for this problem

msgboard schema :

var mongoose     = require('mongoose');
var Schema       = mongoose.Schema;

var msgboardSchema = new Schema({
    date: {
        type: Date,
        default: Date.now,
        expires: 120
        },
    msg: String
});

module.exports = mongoose.model('msgboard', msgboardSchema);

Main Test Schema : In which reference of msgboard is stored

var mongoose     = require('mongoose');
var Schema       = mongoose.Schema;

var TestSchema = new Schema({
    ip : { type : String },
    port : { type : String },
    msgboard : [{type : Schema.Types.ObjectId, ref : 'msgboard'}]   
});

module.exports = mongoose.model('Test', TestSchema);

As msgboard is separate from Test, this will only remove msgboard subdocumet from Test after 120s and not whole test document.