title: symfony entity text input in form builder?
body: <p>I've two entities in symfony :
  first "User" entity that has a $addresses attribute that is a one to many relation to the second entity that named "UserAddresses" with fields:$id,$address(string).
  i want to use symfony form builder to create registration page for my website and i want a text input for the user to add his address to his account in the registration page. when i use :</p>
  
  <pre><code>$builder-&gt;add('addresses', 'entity', array(
      'class' =&gt; 'XXX\UserBundle\Entity\UserAddresses',
      'property' =&gt; 'address',
      'label' =&gt; 'label.address',
      'mapped' =&gt; false,
      'translation_domain' =&gt; 'labels'))
  ;
  </code></pre>
  
  <p>i see a input selectbox that shows the user addresses(that is already null)
  in the registration page and user cannot add his address to it.
  what should i do to replace this input element with an input type='text' element for the user to type his address</p>