我可以在表单生成器中使用查询以symfony形式获取过滤集合

// 获取表单生成器
$form = $this->createFormBuilder()
    ->add('filters', 'collection', array(
        'type' => new FilterType(),
        'allow_add' => true,
        'allow_delete' => true,
        'by_reference' => false,
    ))
    ->add('submit', 'submit', array(
        'attr' => array('class' => 'btn btn-primary'),
    ))
    ->getForm();

// 获取过滤集合
$filters = $form->get('filters')->getData();

// 获取过滤集合中的所有过滤器
$filters = $form->get('filters')->getData();
foreach ($filters as $filter) {
    echo $filter->getName() . ' - ' . $filter->getValue() . '<br>';
}