Symfony：多种形式

//schema.yml

Client:
  columns:
    name: string(255)
    service_id: integer
  relations:
    Service:
      local: service_id
      foreign: id
      foreignAlias: Clients

Service:
  columns:
    name: string(255)

//routing.yml

//i added this route to split \'new\' action in 2 steps
service_choose:
  url: /service/choose
  param: {module: service, action: choose}

service:
  class: sfDoctrineRouteCollection
  options:
    model: Service
    module: service

//create a module based on service route collection (there\'s a task) and add choose action:
  public function executeChoose(sfWebRequest $request)
  {
    $form = new ServiceChooseForm();
    if (($method = $this->request->getMethod()) == \'POST\')
    {
      $form->bind($request->getParameter($form->getName()), $request->getFiles($form->getName()));

      if ($form->isValid())
      {
        $total_clients = $form->getValue(\'total_clients\');
        $this->redirect(\'@service_new?total_clients=\'.$total_clients);
      }      
    }
    $this->form = $form;
    $this->setTemplate(\'choose\');
  }

class ServiceChooseForm extends sfForm
{
  public function configure()
  {
    $this->widgetSchema->setNameFormat(\'service[%s]\');

    $this->setWidget(\'total_clients\', new sfWidgetFormInput());
    $this->setValidator(\'total_clients\', new sfValidatorInteger());
  }
}
//ServiceForm embeds your new clients forms based on total_clients option.
class ServiceForm extends BaseServiceForm
{
  public function configure()
  {
    //clients sub form
    $clientsForm = new sfForm();
    for ($i=0; $i<$this->getOption(\'total_clients\',2); $i++)
    {
      $client = new Client();
      $client->Service = $this->getObject();

      $clientForm = new ClientForm($client);
      $clientsForm->embedForm($i, $clientForm);      
    }
    $this->embedForm(\'newClients\', $clientsForm);
  }
}

//chooseSuccess template, poinst a form to the same action:
<h1>New Service</h1>

<form action=\"<?php echo url_for(\'service_choose\') ?>\" method=\"post\">
  <table>
    <tfoot>
      <tr>
        <td colspan=\"2\">
          <?php echo $form->renderHiddenFields(false) ?>
          <input type=\"submit\" value=\"Continue\" />
        </td>
      </tr>
    </tfoot>
    <tbody>
      <?php echo $form ?>
    </tbody>
  </table>
</form>

//_form partial:

<form action=\"<?php echo url_for(\'@service_create?total_clients=\'. $form->getOption(\'total_clients\')) ?>\" method=\"post\">

$form_1 = $form_2 = $form_3 = new someForm();