php - CakePHP to save relationship in other model -

i have these models:

class prefix extends appmodel {     public $displayfield = 'prefix';      public $hasmany = array(         'state' => array(             'classname' => 'state',             'foreignkey' => 'prefix_id',             'dependent' => false,         ),     ); }  class state extends appmodel {     public $displayfield = 'name';      public $belongsto = array(         'prefix' => array(             'classname' => 'prefix',             'foreignkey' => 'prefix_id',         ),     ); } 

then have admin_add method, automatic scaffolder:

public function admin_add() {     if ($this->request->is('post')) {         $this->peefix->create();         if ($this->prefix->save($this->request->data)) {             $this->redirect(array('action' => 'index'));         } else {                             // error message         }     }     $states = $this->prefix->state->find('list');     $this->set(compact('states')); } 

i have list of them in form:

<?php echo $this->form->input('state', array('multiple' => 'checkbox', 'type' => 'select',)); ?> 

now can set states prefix. however, when submit form, selection disappears. not saved in database.

what did wrong?

you linked models if there 1 state per prefix, , many prefixes "assigned" 1 state. means cannot use 'multiple' => 'checkbox'. either remove or change model associations habtm.