title: Symfony2 How to create one form for many the same entities?
body: <p>I have the following entity:</p>
  
  <pre><code>// ZaquPL/MyBundle/Entity/Task.php
  protected $name;
  protected $order;
  
  public function getName()         {...}
  public function setName($name)    {...}
  public function getOrder()        {...}
  public function setOrder($order)  {...}
  </code></pre>
  
  <p>I would like one form with many entities. It's becouse I want to sort tasks "drag and drop) and change their names in one form, with one submit button and without AJAX.</p>
  
  <p>It should looks like in that schema:</p>
  
  <pre><code>[GRAB AND MOVE &lt;INPUT name="order[1]"&gt;] &lt;INPUT name="name[1]"&gt;
  [GRAB AND MOVE &lt;INPUT name="order[2]"&gt;] &lt;INPUT name="name[2]"&gt;
  [GRAB AND MOVE &lt;INPUT name="order[3]"&gt;] &lt;INPUT name="name[3]"&gt;
  [GRAB AND MOVE &lt;INPUT name="order[4]"&gt;] &lt;INPUT name="name[4]"&gt;
  [GRAB AND MOVE &lt;INPUT name="order[5]"&gt;] &lt;INPUT name="name[5]"&gt;
  [GRAB AND MOVE &lt;INPUT name="order[6]"&gt;] &lt;INPUT name="name[6]"&gt;
  </code></pre>
  
  <p>I know how to create view, how to use jquery UI drag and drop components etc, so don't worry about that. I only ask how to create this form using Symfony FormBuilder. Have you any idea?</p>