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我正在尝试向愿望清单共享表单添加 2 个额外的表单字段，用户输入将在电子邮件中呈现。我已经能够将字段添加到表单中，但我不确定如何在电子邮件树枝模板中添加用户的输入。

以下是我更新 form() 函数的方法：

  public function form(array $form, FormStateInterface $form_state) {
    $form['#tree'] = TRUE;
    $form['#attached']['library'][] = 'core/drupal.dialog.ajax';
    // Workaround for core bug #2897377.
    $form['#id'] = Html::getId($form_state->getBuildInfo()['form_id']);

    $form['to'] = [
      '#type' => 'email',
      '#title' => $this->t('Recipient Email'),
      '#required' => TRUE,
    ];

// COMBAK my edit

    $form['sender_name'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Your Name'),
      '#required' => FALSE,
    ];

    $form['sender_message'] = [
      '#type' => 'textarea',
      '#title' => $this->t('Your Message'),
      '#required' => FALSE,
    ];

// COMBAK eo my edit

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions['submit'] = [
      '#type' => 'submit',
      '#value' => $this->t('Send email'),
      '#submit' => ['::submitForm'],
    ];
    if ($this->isAjax()) {
      $actions['submit']['#ajax']['callback'] = '::ajaxSubmit';
    }

    return $actions;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    /** @var \Drupal\commerce_wishlist\Entity\WishlistInterface $wishlist */
    $wishlist = $this->entity;
    $to = $form_state->getValue('to');

    // COMBAK: my added vars
    $sender_name = $form_state->getValue('sender_name');
    $sender_message = $form_state->getValue('sender_message');

    $this->wishlistShareMail->send($wishlist, $to, $sender_name, $sender_message);

    $this->messenger()->addStatus($this->t('Shared the wishlist to @recipient.', [
      '@recipient' => $to,
    ]));
    $form_state->setRedirectUrl($wishlist->toUrl('user-form'));
  }

这是调用我已更新的 mailHandler 的函数：

public function send(WishlistInterface $wishlist, $to, $sender_name, $sender_message) {
    $owner = $wishlist->getOwner();

    $subject = $this->t('Check out my @site-name wishlist', [
      '@site-name' => $this->configFactory->get('system.site')->get('name'),
    ]);
    $body = [
      '#theme' => 'commerce_wishlist_share_mail',
      '#wishlist_entity' => $wishlist,
      // COMBAK: my added vars
      '#sender_name' => $sender_name,
      '#sender_message' => $sender_message,
    ];
    $params = [
      'id' => 'wishlist_share',
      'from' => $owner->getEmail(),
      'wishlist' => $wishlist,
    ];

    return $this->mailHandler->sendMail($to, $subject, $body, $params);
  }

这是 commerce Wishlist 模块提供的 preprocees 函数：

function template_preprocess_commerce_wishlist_share_mail(array &$variables) {
  /** @var Drupal\commerce_wishlist\Entity\WishlistInterface $wishlist */
  $wishlist = $variables['wishlist_entity'];
  $wishlist_url = $wishlist->toUrl('canonical', ['absolute' => TRUE]);

  $variables['wishlist_url'] = $wishlist_url->toString();

  // COMBAK: my added vars
  //$sender_name = $variables['sender_name'];
}

最后是电子邮件本身的树枝模板：

{#
/**
 * @file
 * Template for the wishlist share email.
 *
 * Available variables:
 * - wishlist_entity: The wishlist entity.
 * - wishlist_url: The wishlist url.
 *
 * @ingroup themeable
 */
#}
<p>
  {% trans %}Check out my wishlist!{% endtrans %}
</p>

<p>
  {% trans %}I use my wishlist for keeping track of items I am interested in.{% endtrans %} <br>
  {% trans %}To see the list in the store and buy items from it, <a href="{{ wishlist_url }}">click here</a>.{% endtrans %}
</p>

<p>
  {% trans %}Thanks for having a look!{% endtrans %}
</p>

我无法弄清楚如何访问我添加到 twig 模板中 body[] 数组的变量。

任何帮助将不胜感激。

谢谢！

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