問題爲「two dimentionnal」添加另一個項目「」FormStateInterface :: getTriggeringElement（）

我在學習drupal 8.我想創建一個包含'two dimensionalnal''添加另一個項目'表單的頁面。我的代碼幾乎工作得很好，但是當我將房間添加到房間時，我有一個奇怪的行爲（我的調試日誌中有一個來自FormStateInterface :: getTriggeringElement（）的奇怪值，請參閱底部的代碼和日誌）問題爲「two dimentionnal」添加另一個項目「」FormStateInterface :: getTriggeringElement（）

第一：我有兩個結構，房子和房間。用戶可以創建一些房屋和每間房子，他可以創造一些房間：

當我添加一些房子，形式正常工作：

當我加入一些房間的最後一棟房子，形式的作品太細：

但是，當我添加一些房間到任何「沒有最後」的房子時，表單不能正常工作（在屏幕截圖中，我點擊了一次到塊房子「1」中的「添加房間」，「房子1」變成了「房屋2」和點擊添加5間房間（？！）（？！）：

這裏我的代碼和一個陌生的調試日誌，我沒有解釋爲什麼我得到這個值（從getTriggeringElement（）在room_addMoreSubmit回調，這是我認爲這個問題），當我點擊「添加房間」按鈕，在

<?php 

namespace Drupal\projet\Form; 
use Drupal\Core\Form\FormBase; 
use Drupal\Core\Form\FormStateInterface; 

class HouseForm extends FormBase { 

    public function getFormId(){ 
    return 'custom_rooms_form'; 
    } 

    function buildForm(array $form, FormStateInterface $form_state) { 



    $house_count = $form_state->get('house_count'); 

    if (is_null($house_count)) { 
     $house_count = 1; 
     $form_state->set('house_count', $house_count); 
    } 

    $form['house'] = array(
     //'#tree' => TRUE, 
     '#prefix' => '<div id="house-replace">', 
     '#suffix' => '</div>' 
    ); 

    for ($house_delta = 0; $house_delta < $house_count; $house_delta++) { 
     if (!isset($form['house'][$house_delta])) { 

     $room_count[$house_delta] = $form_state->get('room_count_'.$house_delta); 

     if (is_null($room_count[$house_delta])) { 
      $room_count[$house_delta] = 1; 
      $form_state->set('room_count_'.$house_delta, $room_count[$house_delta]); 
     } 

     dd($room_count, "room_COUNT"); 

     $form['house'][$house_delta]['room'] = array(
      '#type' => 'fieldset', 
      '#title' => t('house : '.$house_delta), 
      //'#tree' => TRUE, 
      '#prefix' => '<div id="room-replace-'.$house_delta.'">', 
      '#suffix' => '</div>' 
     ); 

     for ($room_delta = 0; $room_delta < $room_count[$house_delta]; $room_delta++) { 
      if (!isset($form['house'][$house_delta]['room'][$room_delta])) { 
      $room = array(
       '#type' => 'textfield' 
      ); 
      $check = array(
       '#type' => 'checkbox' 
      ); 
      $form['house'][$house_delta]['room'][$room_delta] = array(
       '#type' => 'fieldset', 
       '#title' => t('room : '.$house_delta.'.'.$room_delta), 
      ); 
      $form['house'][$house_delta]['room'][$room_delta]['text'] = $room; 
      $form['house'][$house_delta]['room'][$room_delta]['check'] = $check; 
      } 
     } 

     $form['house'][$house_delta]['room']['add'] = array(
      '#type' => 'submit', 
      '#name' => 'add', 
      '#value' => t('Add room'), 
      '#attributes' => array('class' => array('field-add-more-submit'), 'house_delta' => array($house_delta)), 
      '#submit' => array(array(get_class($this), 'room_addMoreSubmit')), 
      '#ajax' => array(
       'callback' => array($this, 'room_addMoreCallback'), 
       'wrapper' => 'room-replace-'.$house_delta, 
       'effect' => 'fade', 
      ), 
     ); 

     } 
    } 

    $form['house']['add'] = array(
     '#type' => 'submit', 
     '#name' => 'add', 
     '#value' => t('Add house'), 
     '#attributes' => array('class' => array('field-add-more-submit')), 
     '#submit' => array(array(get_class($this), 'house_addMoreSubmit')), 
     '#ajax' => array(
      'callback' => array($this, 'house_addMoreCallback'), 
      'wrapper' => 'house-replace', 
      'effect' => 'fade', 
     ), 
    ); 


    $form['submit'] = array(
     '#type' => 'submit', 
     '#value' => t('Create'), 
    ); 

    return $form; 
    } 

    public function room_addMoreSubmit(array $form, FormStateInterface $form_state) { 
    dd($form_state->getTriggeringElement(), "room : getTriggeringElement()"); // below, the log when I add a room to the house '1' (result see above with the last screenshot: "the house 1" became "house 2" and one click add 5 rooms) 
    $house = $form_state->getTriggeringElement()["#array_parents"][1]; 
    $c = $form_state->get('room_count_'.$house) + 1; 
    $form_state->set('room_count_'.$house, $c); 
    $form_state->setRebuild(TRUE); 
    } 

    public function room_addMoreCallback(array $form, FormStateInterface $form_state) { 
    $house = $form_state->getTriggeringElement()["#array_parents"][1]; 
    return $form['house'][$house]['room']; 
    } 

    public function house_addMoreSubmit(array $form, FormStateInterface $form_state) { 
    dd($form_state->getTriggeringElement()["#array_parents"], "house : getTriggeringElement()"); 
    $c = $form_state->get('house_count') + 1; 
    $form_state->set('house_count', $c); 
    $form_state->setRebuild(TRUE); 
    } 

    public function house_addMoreCallback(array $form, FormStateInterface $form_state) { 
    return $form['house']; 
    } 

}

（在room_addMoreSubmit「DD」）日誌房子「1」：

當我點擊「添加房間」按鈕，在門牌號碼1，getTriggeringElement返回添加按鈕的排列的父母。而且，如你所見，父母是「2」而不是「1」（房子1）所以當我點擊房子1的「添加房間」按鈕時，這是房子「2」不是房子「1」。

我不明白爲什麼...使用getTriggeringElement不是好方法嗎？

來源

2015-10-29 user2137454

解決辦法：

$form['house'][$house_delta]['room']['add'] = array(
      '#type' => 'submit', 
      '#name' => 'add-'.$house_delta, 
      '#value' => t('Add room'), 
      '#attributes' => array('class' => array('field-add-more-submit'), 'house_delta' => array($house_delta)), 
      '#submit' => array(array(get_class($this), 'room_addMoreSubmit')), 
      '#ajax' => array(
       'callback' => array($this, 'room_addMoreCallback'), 
       'wrapper' => 'room-replace-'.$house_delta, 
       'effect' => 'fade', 
      ), 
     );

獨特的名字是我的問題的問題。所以，我改變了名稱屬性。

來源

2015-11-03 20:54:44 user2137454

問題爲「two dimentionnal」添加另一個項目「」FormStateInterface :: getTriggeringElement（）

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