cakephp - Conditional validation -

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my hoteladdress model:

<?php  class hoteladdress extends appmodel {     var $name = 'hoteladdress';     var $belongsto = array(         'hotel' => array(             'classname' => 'hotel'         )     );      var $validate = array(         'address' => array(             'rule' => 'notempty',         )     );

my hotelmodel

<?php  class hotel extends appmodel {     var $name = 'hotel';     var $hasandbelongstomany = array(         'hotelcategory' => array(             'classname' => 'hotelcategory'         )     );     var $belongsto = array(         'page' => array(             'classname' => 'page'         )     );     var $hasmany = array(         'hoteladdress' => array(             'classname' => 'hoteladdress',             'dependent' => true         ),         'hotelphone' => array(             'classname' => 'hotelphone',             'dependent' => true         )     );

my view:

<div id="main">         <h2>add hotel</h2>         <?php echo $this->session->flash();?>         <div>         <?php         echo $this->form->create('hotel');         echo $this->form->input('hotel.name');         echo $this->form->input('hotelcategory', array('options' => $hotel_categories, 'multiple' => 'checkbox'));         echo $this->form->input('hoteladdress.0.address');         echo $this->form->input('hoteladdress.1.address');         echo $this->form->input('hoteladdress.2.address');         echo $this->form->input('hotelphone.0.phone');         echo $this->form->input('page.meta_keywords');         echo $this->form->input('page.meta_description');          echo $this->form->end('save hotel');         ?>         </div> <!-- main ends --> </div>

my problem don't need validate other hoteladdresses. if user fills @ least 1 of addresses, should validate. however, if doesn't fill any, error should show.

i believe should adding code on beforesave method don't have idea on should there this.

update:

i have in hoteladdress model works not validating existence of other addresses if 1 available. however, still saves.

var $existing_address = false; var $validate = array(     'address' => array(         'rule' => 'checkonce',     ) );  function checkonce($check) {     if (isset($this->data['hoteladdress']['address'])) {         if (! empty($this->data['hoteladdress']['address'])) {             return $this->existing_address = true;         } else {             unset($this->data['hoteladdress']['address']);             return $this->existing_address;         }     }     return $this->existing_address; }

i'd go in controller before calling save:

if (empty($this->data['hoteladdress'][1]['address'])) {     unset($this->data['hoteladdress'][1]['address']); } if (empty($this->data['hoteladdress'][2]['address'])) {     unset($this->data['hoteladdress'][2]['address']); }

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