mongoose custom validation using 2 fields

Question

I want to use mongoose custom validation to validate if endDate is greater than startDate. How can I access startDate value? When using this.startDate, it d

Answer 1

An an alternative to the accepted answer for the original question is:

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

// schema definition
var ASchema = new Schema({
  startDate: {
    type: Date,
    required: true
  },
  endDate: {
    type: Date,
    required: true,
    validate: [dateValidator, 'Start Date must be less than End Date']
  }
});

// function that validate the startDate and endDate
function dateValidator(value) {
  // `this` is the mongoose document
  return this.startDate <= value;
}