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        如何在节点保存在 Drupal 8 之前操作值?

        时间:2023-06-23

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                • 本文介绍了如何在节点保存在 Drupal 8 之前操作值?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我有一个编辑节点表单.当用户输入新值并单击提交以编辑节点时,我首先想取回旧节点,操作该值,然后保存/更新节点.

                  I have an editing node form. When user enters new value and clicks on submit to edit the node, I first want to get the old node back, manipulate the value and then just save/update the node.

                  以下是我的解决方案,但它不起作用.

                  Below is my solution, but it does not work.

                  function custom_module_form_node_form_alter(&$form, FormStateInterface $form_state) {
                      $editing_entity = $form_state->getFormObject()->getEntity();
                  
                      if (!$editing_entity->isNew()) {
                          $form['actions']['submit']['#submit'][] = 'custom_module_node_form_submit';
                      }
                  }
                  
                  function custom_module_node_form_submit($form, FormStateInterface $form_state) {
                     $editing_entity = $form_state->getFormObject()->getEntity();
                  
                     $entity = Drupal::entityTypeManager()->getStorage('node')->load($editing_entity->id());
                  }
                  

                  在 form_submit 钩子中,我试图取回旧节点,但已经太晚了,节点已经更新/保存.在 Drupal 8 中更新/保存节点之前,如何取回旧节点并操作该值?

                  In the form_submit hook, I tried to get the old node back but it is already too late and the node is already updated/saved. How can I get the old node back and manipulate the value before updating/saving the node in Drupal 8?

                  推荐答案

                  尝试使用hook_entity_presave():

                  /**
                   * Implements hook_entity_presave().
                   */
                  function YOUR_MODULE_entity_presave(DrupalCoreEntityEntityInterface $entity) {
                    switch ($entity->bundle()) {
                      // Here you modify only your day content type
                      case 'day':
                        // Setting the title with the value of field_date.
                        $entity->setTitle($entity->get('field_date')->value);
                       break;
                    }
                  }
                  

                  从这里采取的解决方案:https://drupal.stackexchange.com/questions/194456/how-to-use-presave-hook-to-save-a-field-value-as-node-title

                  Solution taken from here: https://drupal.stackexchange.com/questions/194456/how-to-use-presave-hook-to-save-a-field-value-as-node-title

                  您还可以获得旧值,例如:$entity->original.在这里查看:

                  Also you can get old value like: $entity->original. Check it out here:

                  https://drupal.stackexchange.com/questions/219559/how-to-get-the-original-entity-on-hook-entity-presave

                  这篇关于如何在节点保存在 Drupal 8 之前操作值?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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