displaying symfony2 object values in twig template

Question

i'm having problems passing object values to my twig templates.

Here is some of my controller code that shows the content of the object:

if (!$request->isXmlHttpRequest()) {
            $manejador = new Manejador();
            $temas=new ArrayList();
            $temas=$manejador->scrollingAjax();
            return $this->render(
                    'UsuarioBundle:Default:index.html.twig',
              array(
                    'temas'=>$temas));
        } 

Here, my Arraylist code.

class ArrayList {
    private $list = array();
    public function Add($obj)
    {
    ....
    }
    public function Remove($key)
    {
       ...
    }

    public function Size()
    {
     ....
    }

    public function IsEmpty()
    {
    ....
    }

    public function GetObj($key)
    {
    .....
    }

    public function GetKey($obj)
    {
    .....
    }
    }

Here is some of my Tema class code

class Tema {
    private $texto;
    private $titulo;
    private $usuario;
    private $fecha;
    private $numeroRespuesta;

    function getnumeroRespuesta(){
        return $this->numeroRespuesta;
    }

    function getUsuario(){
        return $this->usuario;
    }
    function getTitulo(){
        return $this->titulo;
    }
    function getTexto(){
        return $this->texto;
    }
   ......

Then in my twig template I want to display the value of 'tema' but the results are empty values

</thead>
    <tbody id="cuerpo-tabla">
        <tr>
        {% for tema in temas %}
           <th width="10%">{{ tema.fecha  }}</th>
           <th width="70%">{{ tema.titulo }}</th>
           <th width="10%">{{ tema.usuario }}</th>
           <th width="10%">{{ tema.numeroRespuesta }}</th>

            {% endfor %}
        </tr>
    </tbody>

when i do var_dump($temas), the result is :

object(people\UsuarioBundle\Modelo\Tema)[287]
      private 'texto' => string '' (length=0)
      private 'titulo' => string 'titulo1?' (length=37)
      private 'usuario' => string 'PlayBackWow' (length=11)
      private 'fecha' => string '21:27' (length=5)
      private 'numeroRespuesta' => string '0' (length=1)
  1 => 
    object(people\UsuarioBundle\Modelo\Tema)[286]
      private 'texto' => string '' (length=0)
      private 'titulo' => string 'titulo2' (length=25)
      private 'usuario' => string 'OsoMiltro' (length=9)
      private 'fecha' => string '21:31' (length=5)
      private 'numeroRespuesta' => string '0' (length=1)
  2 => 

Answer 1

It seems you are trying to iterate a $temas variable that's an ArrayList object with no public properties. Furthermore the intended behaviour is to iterate over its internal $list property I think. To make your ArrayList object usable in a foreach context , try implementing Traversable and its concrete subinterfaces. Better yet, for simple requirements you could:

• just use a simple native php array
• use ArrayObject