title: Symfony2 form collection: Index of the current object is shown
body: <p>I've got a problem with displaying collection in my form.</p>
  
  <p>When displaying my entity collection I've got something like this :</p>
  
  <pre><code>0
  Name: myInputName
  Address: myInputAddress
  
  1
  Name: myInputName
  Address: myInputAddress
  </code></pre>
  
  <p>My question is why Symfony2 display the <strong>index</strong>...</p>
  
  <p>And this for all saved entities into my collection...</p>
  
  <p>Here the code I use:</p>
  
  <pre><code>$builder            
          -&gt;add('person', 'collection', array(   
              'label' =&gt; ' ',             
              'type' =&gt; new PersonType(),
              'prototype' =&gt; true,
              'allow_add' =&gt; true,
              'allow_delete' =&gt; true,
              'by_reference' =&gt; false,
          ))
      ;
  </code></pre>
  
  <p>In my twig file:</p>
  
  <pre><code>&lt;div&gt;
      {{ form_widget(edit_form) }}    
  &lt;/div&gt;
  </code></pre>
  
  <p>Help please</p>
  
  <p>Sam</p>