CakePHP return invalid node - php

Question

I am trying create a webapplication with CakePHP. I am newbie with that but i created a lot lines of code. Now i have to add ACL and now i have a big problem. My foreach loop with if statement call $this->ACL->deny('Group', 'Alias in ARO table') or $this->ACL->allow('Group', 'Alias in ARO table'). Everything is fine and automatic table acos_aros is modified great ... BUT !! i have one alias which generate something like that:
Warning (512): DbAcl::allow() - Invalid node [CORE\Cake\Model\Permission.php, line 182]
I have no idea why. It is 'Podopieczni' when i change to 'Podopieczn' or to 'Podopieczni1' then is working fine without any errors. Anybody can told me why alias 'Podopieczni' generate that error ?
EDIT 1
My bad. I have actually problem with ACO not Aro as said before. When i change alias in ACO table from Podopieczni to Podopieczni1 or something else is working. Alias Podopieczni is generate error.
Here is my code
public function pokaz(){
if ($this->request->is('post')){
$acl['Aro'] = $this->Acl->Aro->find('list', array(
'fields' => array('id', 'alias'),
'conditions' => array(
'parent_id IS NULL'
)
));
$acl['Aco'] = $this->Acl->Aco->find('list', array(
'fields' => array('id', 'alias'),
'conditions' => array(
'parent_id IS NULL'
)
));
foreach($this->request->data['uprawnienia'] AS $pozycja => $uprawnienie){
$t_aco = $acl['Aco'][split('-',$pozycja)[0]];
$t_aro = $acl['Aro'][split('-',$pozycja)[1]];
if($uprawnienie){
//echo 'ALLOW: '.$t_aro.' => '.$t_aco.'<br>';
$this->Acl->Allow($t_aro, $t_aco);
} else {
//echo 'DENY: '.$t_aro.' => '.$t_aco.'<br>';
$this->Acl->Deny($t_aro, $t_aco);
}
}
//$this->redirect(array('controller'=>'admin', 'action' => 'pokaz'));
//$this->render('/admin/pokaz');
//exit;
}
$wynik = $this->Acl->Aco->find('all', array(
'conditions' => array(
'parent_id is null'
)
));
for($a=0; $a<count($wynik); $a++){
$tmp = array();
foreach($wynik[$a]['Aro'] AS $wiersz){
$tmp[$wiersz['foreign_key']] = $wiersz;
}
$wynik[$a]['Aro'] = $tmp;
}
$this->set('wyniki', $wynik);
$this->set('grupy', $this->requestAction('/admin/pobierzGrupy'));
}
SOLVED
In the ACOS table I have two rows with this same alias.
YOU ARE AWESOME noslone. VERY BIG THANKS FOR YOUR TIME AND PATIENCE :)))

Answer 1

That alias does not exist in the aros or acos table.
You should create it first.
For ARO:
$aroData = array(
'id' => NULL,
'model' => 'Group',
'alias' => 'Podopieczni'
);
$this->Acl->Aro->save($aroData);
For ACO:
$acoData = array(
'id' => NULL,
'parent_id' => NULL,//or parent_id?
'alias' => 'Podopieczni'
);
$this->Acl->Aco->save($acoData);
You should read the Documentation, it is explained pretty nice.