gistfile1.js

//meta validation
//idea for dynamic validation to enable model validation to change its own validation on the fly
//example syntax below

var validation = {
  rules: [ //model attribute rules

    'recipient_type': {
      //on: true, //always on by default
      when: [
        { blank: true, trigger: 'fail' },
        {
          val: 'SMS',
          trigger: function(rules, self){ //rules = the rules model with extra functions attached, self = the 'recipient_type' rules block
            //this will only happen if the value is SMS, if the value changes to anything else, the rules will revert back to the originals
            rules.turn_off('user_id');
            rules.turn_on('sms_number');
          },
          //revert: true //true by default
        }
      ]
    },

    'user_id': {
      when: [
        { blank: true, trigger: 'fail' },
        {
          fail: true, //if it fails
          trigger: function(rules, self){
            //this will only happen if user_id fails
            self.message = 'Please select a user';
          }
        }
      ]
    },

    'sms_number': {
      on: false, //this rule is off unless explicitly turned on
      when: [
        { blank: true, trigger: 'fail' },
        {
          fail: true, //if it fails
          trigger: function(rules, self){
            //this will only happen if user_id fails
            self.message = 'Please enter a SMS number';
          }
        }
      ]
    }
  ]
};