Mongoose populate a field without ObjectId?

Question

I have a schema:

var Schema = mongoose.Schema;

var TicketSchema = new Schema({
externalId: String,
name: String,
items: [{
    externalId: String,
    price: Number,
    quantity: {
        type: Number,
        default: 1
    },
    comment: {
        type: String,
        default: '',
        trim: true
    },
    entity: {
        type: String,
        ref: 'Entity'
    }
}],
tableId: String
});

mongoose.model('Ticket', TicketSchema);

And I want to populate entity field with an unique field other than ObjectId. How can I achieve that?

Answer 1

Though late answer. Please check Populate Virtuals for Mongoose 4.5.0

Click the link below

http://mongoosejs.com/docs/populate.html

And scroll down or search for Populate Virtuals you will see it does exactly what you want.