How do I create an automatic field in Mongoose?

Question

How do I create an automatic field in Mongoose?

I have a model that looks like:

var CompanySchema = new Schema({
    name: String
  , logoUrl: String
  , created: {
      type: Date,
      default: new Date().toUTCString() 
  }
  , deleted: {
      type: Date,
      default: null 
  }
});

I want to have a field called id as well (this is on top of the _id that already gets added). So how can I create the id field and have it automatically assigned to the value of _id?

node.js
mongodb
mongoose

Answer 1

CompanySchema.pre('save', function(next) {
  this.id = this._id;
  next();
});