mail-subscription-service/models/subscriber.js

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var SubscriberSchema = new Schema(
  {
    first_name: {type: String, required: false, maxLength: 100},
    last_name: {type: String, required: false, maxLength: 100},
    email: {type: String, required: true, maxLength: 100},
    confirmed_subscription: { type: Boolean, default: false },
    last_updated: { type: Date, default: Date.now() },
    registration_date: { type: Date, default: Date.now(), immutable: true },
    registration_attempts : { type: Number, default: 1 }
  }
);

SubscriberSchema.methods.attempted_registration = function attempted_registration() {
  this.registration_attempts += 1;
  this.last_updated = Date.now();
};

//Export model
module.exports = mongoose.model('Subscriber', SubscriberSchema);