cakephp2 can't display data from contain - php

Question

I am developing a web app using cake php 2.
I have an issue while displaying data from 2 tables...
My models :
<?php
class Discipline extends AppModel{
public $hasMany = "Student";
}
?>
<?php
class Student extends AppModel{
public $belongsTo = array(
"Discipline" => array(
"className" => "Discipline",
"foreignKey" => "discipline_id"
)
);
}
?>
Here is my studentscontroller :
<?php
class StudentsController extends AppController{
function admin_index(){
if($this->request->is('put') || $this->request->is('post')){
$student = $this->request->data['Student'];
if($this->Student->save($this->request->data)){
$this->Session->setFlash("L'eleve a bien été modifié","notif");
}
}
$d['student'] = $this->Student->find('all',array(
'contain' => "Discipline"
));
$this->set($d);
}
}
I am trying to display student's data using this view :
<?php
foreach($student as $k => $v){
$v = current($v);
echo "<td>Action</td>";
echo "<td>Label</td>";
echo "<td>".$v['nom']." ".$v['prenom']."</td>";
echo "<td>".$v['sexe']."</td>";
echo "<td>".$v['naissance']."</td>";
echo "<td>".$v['Discipline']['designation']."</td>";
echo "<td>".$v['comite']."</td>";
echo "<td>".$v['classe']."</td>";
echo "<td>".$v['elite']."</td>";
echo "<td>".$v['alerte']."</td>";
echo "<td>".$v['quota1']."</td>";
echo "<td>".$v['quota2']."</td>";
echo "<td>".$v['total']."</td>";
echo "<td>Pris</td>";
echo "<td>Restant</td>";
echo "<td>Supp</td>";
}
?>
But i have an issue on this line :
echo "<td>".$v['Discipline']['designation']."</td>";
It says this error :
notice (8): Undefined index: designation [APP\View\Students\admin_index.ctp, line 47]
I am used to develop on cakephp 3 and I am pretty embarassed with that error.. what to do to display data from Disciplines table from my student view ?
Any idea ? Thx
EDIT: I did a debug on my StudentsController, and I found the data I wanna display :
array(
'student' => array(
(int) 0 => array(
'Student' => array(
'id' => '2',
'prenom' => 'Jean',
'nom' => 'Michel',
'sexe' => '1',
'naissance' => '2015-08-02',
'age' => '12',
'classe' => '1',
'discipline_id' => '1',
'comite' => 'test',
'categorie' => 'test',
'elite' => true,
'alerte' => 'test',
'quota1' => '12',
'quota2' => '12',
'total' => '24',
'note' => 'tete'
),
'Discipline' => array(
**'id' => '1',
'designation' => 'Alpin'**
)
)
)
)

Answer 1

i think you should change the view
Change:
foreach($student as $k => $value){
$v = current($value);
to:
foreach($student as $k => $v){
$v = current($v);
and change:
echo "<td>".$v['Discipline']['designation']."</td>";
to
echo "<td>".$value['Discipline']['designation']."</td>";
You overwrite the variable $v with the first found array, so $v would be $v['Student']
I for myself won't use current to go inside a array for CakePHP, but use $v['Student'] everywhere