如何使用Add More选项在Drupal 7 Ajax Form中保留和检索图像细节？

Question

我的自定义模块代码:

  <?php
  function my_module_menu() {
  $items = array();

  $items['form-example'] = array( 
    'title' => 'My Module Form', 
    'description' => 'A form to mess around with.',
    'page callback' => 'drupal_get_form', 
    'page arguments' => array('my_module_form'), 
    'access callback' => TRUE
  );

  return $items;
}

function my_module_form($form, &$form_state, $no_js_use = FALSE) {  

  $form['file'] = array(
        '#type' => 'file',
        '#title' => t('Image'),
        '#description' => t('Upload an image'),
  );

    $form['menu'] = array(
    '#markup' => '<b>Add More:</b>'
    );

      $form['#tree'] = TRUE;
      $form['names_fieldset'] = array(
        '#type' => 'fieldset',
        '#title' => t('Add more images'),
        '#prefix' => '<div id="names-fieldset-wrapper">',
        '#suffix' => '</div>',
      );

      if (empty($form_state['num_names'])) {
        $form_state['num_names'] = 1;
      }

      for ($i = 0; $i < $form_state['num_names']; $i++) {       
        $form['names_fieldset']['name'][$i][0]= array(
             '#title' => t('Image'),
             '#type' => 'file',
             '#weight' => '5',
             '#description' => t('Upload an image'),
        );
      }

      $form['names_fieldset']['add_name'] = array(
        '#type' => 'submit',
        '#value' => t('Add one more'),
        '#submit' => array('my_module_add_more_add_one'),
        '#ajax' => array(
          'callback' => 'my_module_add_more_callback',
          'wrapper' => 'names-fieldset-wrapper',
        ),
      );
      if ($form_state['num_names'] > 1) {
        $form['names_fieldset']['remove_name'] = array(
          '#type' => 'submit',
          '#value' => t('Remove one'),
          '#submit' => array('my_module_add_more_remove_one'),
          '#ajax' => array(
            'callback' => 'my_module_add_more_callback',
            'wrapper' => 'names-fieldset-wrapper',
          ),
        );
      }

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

  $form['#submit'][] = 'my_module_add_more_submit';
    if ($no_js_use) {
    if (!empty($form['names_fieldset']['remove_name']['#ajax'])) {
      unset($form['names_fieldset']['remove_name']['#ajax']);
    }
    unset($form['names_fieldset']['add_name']['#ajax']);
  }    
  return $form;
} 


function my_module_add_more_callback($form, $form_state) {
  return $form['names_fieldset'];
}

function my_module_add_more_add_one($form, &$form_state) {
  $form_state['num_names']++;
  $form_state['rebuild'] = TRUE;
   //$form_state['no_redirect'] = TRUE;
}

function my_module_add_more_remove_one($form, &$form_state) {
  if ($form_state['num_names'] > 1) {
    $form_state['num_names']--;
  }
  $form_state['rebuild'] = TRUE;
}

function my_module_add_more_submit($form, &$form_state) {
    $file = $form_state['values']['file']."<br \>";
    $validators = array();
    $file = file_save_upload('file', $validators, 'public://uploads');  
    print_r($file);     
    exit();
}

当我提交表单时,我试图获取通过"添加更多"选项添加的图像的详细信息.但我无法得到它们.但是我只能获得第一张图片的细节(并且能够上传它).

我想知道两件事:

1. 如何检索使用"添加更多"选项(字段集)添加的图像的详细信息,以及如何上载它们？
2. 当我浏览并选择字段集中的图像时,在添加另一个图像字段后,它不会保留在表单中.如何在fieldset中保留所选图像？

Answer 1

看看这篇文章 - http://evolvingweb.ca/story/poutine-maker-introduction-field-api-drupal-7-part-1-因为它有一些关于你的代码中缺少的东西的信息.$三角洲.$ delta是分配给字段值的id,即使您的字段只有1个项目.