formatdate.js

var mongoose = require('mongoose'),
    SchemaTypes = mongoose.SchemaTypes || mongoose.Schema.Types,
    CastError = mongoose.SchemaType.CastError;

var moment = require('moment');


/**
 * FormatDate
 */
function FormatDate(path, options) {
  SchemaTypes.Date.call(this, path, options);

  this.validators.push([function(v) {
    return v instanceof Date;
  }, 'format']);
}
FormatDate.prototype = Object.create(SchemaTypes.Date.prototype);
FormatDate.prototype.cast = function(value) {
  if (value === null || value === '') {
    return null;
  }

  if (value instanceof Date) {
    return value;
  }

  if (value instanceof Number ||
      'number' == typeof value ||
      String(value) == Number(value)) {
    // support for timestamps
    return new Date(Number(value));
  }

  // format date string
  var format = this.options.format || 'YYYY-MM-DD';
  var mdate = moment(value.toString() || '', format);

  if (mdate.format(format) != value) {
    // @todo hmmm....
    //throw new CastError('formatdate', value);
    return value;
  }

  return mdate.toDate();
};

module.exports = mongoose.Schema.Types.FormatDate = FormatDate;