symfony 2, form_rest(form) shows collection fields -

my form has 3 collection fields:

$builder->add('affiliates', 'collection', array(     'type' => new affiliateform(),     'allow_add' => true,      'allow_delete' => true,      'by_reference' => false,     'options' => array(         'affiliate_types' => $options['affiliate_types'],         'business_types' => $options['business_types'],     ), ));  $builder->add('other_businesses', 'collection', array(     'type' => new otherbusinessform(),     'allow_add' => true,      'allow_delete' => true,      'by_reference' => false, ));  $builder->add('welfare_activities', 'collection', array(     'type' => new welfareactivityform(),     'allow_add' => true,      'allow_delete' => true,      'by_reference' => false,     'options' => array(         'welfare_activity_types' => $options['welfare_activity_types'],     ), )); 

in template show each subform field separately 1 one, below:

<td class="t1c5" >{{ form_widget(affiliate.location) }}                   {{ form_errors(affiliate.location) }}</td> 

at end of form did:

{{ form_rest(form) }} 

but causes display following words @ end of form, when given collection empty: "affiliates", "other businesses", "welfare activities". question is:

1. why words displayed on form?

2. i can following avoid above issue:

   <div style="display:none;">{{ form_rest(form) }}</div>     

   is correct way of dealing problem (maybe can make field hidden or whatever)?

thank you.

those words displayed on form because forget :

{{ form_label(affiliate.location) }} … …   

according doc :

form_rest(view, variables)

this renders fields have not yet been rendered given form. it's idea have somewhere inside form it'll render hidden fields , make fields forgot render more obvious (since it'll render field you).