task_list.js

  /*
  * Run validations
  */
  TaskList.validate = function (attrs) {
    //check for required attributes
    var errors = {}
      , i18n = Teambox.helpers.jade.i18n;

    _(['name']).each(function(attr) {

      if (!attrs[attr].length) {
        errors[attr] = errors[attr] || [];
        errors[attr].push(i18n('task_lists.errors.' + attr + '.cant_be_blank'));
      }
    })

    if (attrs.name.length && attrs.name.length > 255) {
      errors.name = errors.name || [];
      errors.name.push(i18n('task_lists.errors.name.too_long'));
    }

    //check start/end date
    var startDate = attrs['start_on']
      , endDate = attrs['finish_on']
      , hasStartDate = startDate && startDate.length
      , hasEndDate = endDate && endDate.length;

      if (hasStartDate && hasEndDate) {
        if (Date.parse(startDate) > Date.parse(endDate)) {
          errors.finish_on = errors.finish_on || [];
          errors.finish_on.push(i18n('task_lists.errors.finish_on.end_date_less_than_start_date'));
        }
      }

    return Object.keys(errors).length ? errors : false;
  };