cakephp - Saving data from hasMany and belongsTo -

i having trouble cakephp. try find answer on forum, nothing usefull in case :( here problem :

i have 2 table :

author  | role id      | id role_id | name 

i set author "belongsto role" , role "hasmany author"

on view, form looks :

$this->form->create('role') $this->form->input('name')); $this->form->input('author.id', array('type' => 'select', 'multiple' => true, 'options' => $authors)); 

my role controller :

function index() {     if (!empty($this->data)) {         if ($this->role->saveall($this->data)) {         }     }     $this->set('authors', $this->role->author->find('list')); } 

but when try save, new role in created, create new author row instead of update existing one. want, update role_id author table when create new role. idea what's wrong ?

edit: same result $this->request->data instead of $this->data data looks when create new role assigned 2 authors:

array(     'role' => array(         'name' => 'test',     ),     'author' => array(         'id' => array(             (int) 0 => '1',             (int) 1 => '3'         )     ) ) 

thanks help.

to start save data not in correct format. can't set author.id array, expecting integer therefore isn't updating existing data.

not 100% sure work try rewriting save data this:-

$authorids = hash::extract($this->request->data, 'author.id.{n}');  foreach ($authorids $authorid) {     $authors[] = [         'id' => $authorid     ]; }  $data = [     'role' => $this->request->data['role'],     'author' => $authors ]; 

then use $this->role->saveall($data). (i'm sure there's more elegant way of writing this, quick example code).