1var mongoose = require('mongoose'),
 2    Schema   = mongoose.Schema;
 3
 4
 5var commentSchema = new Schema({
 6    comment: { type: String },
 7    user: {
 8        type: mongoose.Schema.Types.ObjectId,
 9        ref: 'userModel'
10    }
11});
12module.exports = mongoose.model('commentModel', commentSchema);