保存自定义帖子元数据，不保存数据

Question

我已经创建了自元博客日期和日期到的自定义帖子类型。

自定义职位类型创作与回调的add_events_metaboxes

function event_list_init(){ 

    $labels = array(
     'name'     => _x('Events', 'post type general name'), 
     'singular_name'   => _x('Event', 'post type singular name'), 
     'menu_name'    => _x('Events List', 'admin menu'), 
     'name_admin_bar'  => _x('Events List', 'add new on admin bar'), 
     'add_new_item'   => __('Add New Event'), 
     'new_item'    => __('New Event'), 
     'edit_item'    => __('Edit Event'), 
     'view_item'    => __('View Event'), 
     'all_items'    => __('All Events'), 
     'search_items'   => __('Search Events'), 
     'not_found'    => __('No Events found.'), 
     'not_found_in_trash' => __('No Events found in Trash.') 
    ); 

    $args = array(
     'labels'    => $labels, 
     'description'   => __('Create Events'), 
     'public'    => true, 
     'publicly_queryable' => true, 
     'show_ui'    => true, 
     'show_in_menu'   => true, 
     'query_var'    => true, 
     'rewrite'    => array('slug' => 'event'), 
     'capability_type'  => 'post', 
     'has_archive'   => true, 
     'hierarchical'   => true, 
     'menu_position'   => 6, 
     'register_meta_box_cb' => 'add_events_metaboxes', 
     'menu_icon'    => 'dashicons-calendar-alt', 
     'supports'    => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments') 
    ); 

    register_post_type('events',$args); 

} 

add_action('init','event_list_init'); 

这里函数是回调函数实例化一个类来创建metabox并通过行动钩保存后的数据save_post

function add_events_metaboxes(){ 
    new eventsListMetaBox(); 
} 

class eventsListMetaBox{ 
    /* 
    * Constructor that creates the meta box 
    */ 
    public function __construct(){ 
     /** 
     * Render and Add form meta box 
     */ 
     add_meta_box('wpt_events_date', 'Events Date', array($this, 'fisa_events_date'), 'events', 'side', 'high'); 

     /** 
     * Save Date from and to as meta key 
     */ 
     add_action('save_post',array($this, 'fisa_events_date_save'),1,2); 
    } 

    /** 
    * Render Form for Events date 
    */ 
    function fisa_events_date() { 

     global $post; 

     // Add an nonce field so we can check for it later. 
     wp_nonce_field('events_date_fromto', 'events_datefromto_nonce'); 

     // Echo out the field 
     echo '<label for="_fisa_date_from">Date From</label>'; 
     echo '<input id="fisa-event-datefrom" type="text" name="_fisa_date_from" class="widefat" />'; 
     echo '<br/><br/>'; 
     echo '<label for="_fisa_date_to">Date To</label>'; 
     echo '<input id="fisa-event-dateto" type="text" name="_fisa_date_to" class="widefat" />'; 

    } 

    /** 
    * Meta key actual database insertion 
    */ 
    function fisa_events_date_save($post_id){ 

     /** 
     * Check if nonce is not set 
     */ 
//  if (!isset($_POST['events_datefromto_nonce'])) 
//   return $post_id; 
// 
//  $nonce = $_POST['events_datefromto_nonce']; 
//  /** 
//   * Verify that the request came from our screen with the proper authorization 
//   */ 
//  if(!wp_verify_nonce($nonce,'events_date_fromto')) 
//   return $post_id; 
// 
//  //Check the user's permission 
// 
//  if(!current_user_can('edit_post',$post_id)) 
//   return $post_id; 

     //Prepare and sanitize the data before saving it 
     $events_date = array(
          sanitize_text_field($_POST['_fisa_date_from']), 
          sanitize_text_field($_POST['_fisa_date_to']) 
         ); 

     update_post_meta($post_id, '_fisa_events_date', $events_date); 
    } 
} 

我的问题是我不能看到_fisa_events_date meta键在postmeta wordpress.table任何人都可以请指出我错过了什么，或者我应该怎么做才能保存它？

Answer 1

您依靠register_meta_box_cb来显示您的元框并将保存逻辑挂接到save_post。问题是，仅当需要显示元框时 - 即，当编辑或添加帖子页面被访问时，Wordpress运行register_meta_box_cb（其挂钩到add_meta_boxes）。但是当Wordpress正在保存帖子时，它不需要显示元框，所以register_meta_box_cb，add_events_metaboxes和您的save_post挂钩永远不会被调用。

最简单的解决方法是删除您参数register_meta_box_cb，和挂钩您add_events_metaboxes功能的admin_init事件。

add_action('admin_init', 'add_events_metaboxes'); 

您可以在add_action('init', 'event_list_init')挂钩下执行此操作。

找到要点here。

Answer 2

据WordPress的documentation，register_meta_box_cb：

将编辑表单设置了元盒时被调用。

这是too late挂钩到save_post。

因此，我建议您单独挂接到save_post某处你的functions.php文件：

注册后型

$args = array(
    .... 
    'register_meta_box_cb' => 'add_events_metaboxes', 
    .... 
); 
register_post_type('events', $args); 

渲染metabox

function add_events_metaboxes(){ 
    new eventsListMetaBox(); 
} 

class eventsListMetaBox{ 
    public function __construct(){ 
     add_meta_box('wpt_events_date', 'Events Date', array($this, 'fisa_events_date'), 'events', 'side', 'high'); 
    } 

    function fisa_events_date() { 
     ... 
    } 
} 

保存metabox

add_action('save_post', 'fisa_events_date_save'); 

function fisa_events_date_save(){ 
    global $post; 
    $post_id = $post->ID; 

    // Use wp_verify_nonce and other checks to verify everything is right 

    $events_date = array(
         sanitize_text_field($_POST['_fisa_date_from']), 
         sanitize_text_field($_POST['_fisa_date_to']) 
        ); 
    update_post_meta($post_id, '_fisa_events_date', $events_date); 
} 

请记住，WordPress是不打算完全操作的面向对象的，因此存在利用其hooking system与OOP概念可能会出现问题。

Answer 3

最简单&最灵活的解决方案是使用高级自定义字段。

Answer 4

在其他的答案暴露出来，问题是register_meta_box_cb回调将只涉及以下内容：

不要在回调remove_meta_box()和add_meta_box()电话。

save_post不在回调中并且必须是独立的。这个动作钩子发生：

每当文章或页面创建或更新，这可能是来自进口，后/页的编辑形式，xmlrpc的，或交电子邮件

正如你使用类来包装元框创建，我会建议包装它的一切。
_{PS：检查注释并在save_post回拨内添加必要的检查。}

<?php 
class MyEvents { 
    public function __construct(){ 
     add_action('init', array($this, 'init'));  
     add_action('save_post', array($this, 'save_post'), 10, 2); // no need to change priority to 1 
    } 

    public function init(){ 
     $labels = array(
      'name'     => _x('Events', 'post type general name'), 
      'singular_name'   => _x('Event', 'post type singular name'), 
      'menu_name'    => _x('Events List', 'admin menu'), 
      'name_admin_bar'  => _x('Events List', 'add new on admin bar'), 
      'add_new_item'   => __('Add New Event'), 
      'new_item'    => __('New Event'), 
      'edit_item'    => __('Edit Event'), 
      'view_item'    => __('View Event'), 
      'all_items'    => __('All Events'), 
      'search_items'   => __('Search Events'), 
      'not_found'    => __('No Events found.'), 
      'not_found_in_trash' => __('No Events found in Trash.') 
     ); 
     $args = array(
      'labels'    => $labels, 
      'description'   => __('Create Events'), 
      'public'    => true, 
      'publicly_queryable' => true, 
      'show_ui'    => true, 
      'show_in_menu'   => true, 
      'query_var'    => true, 
      'rewrite'    => array('slug' => 'event'), 
      'capability_type'  => 'post', 
      'has_archive'   => true, 
      'hierarchical'   => true, 
      'menu_position'   => 6, 
      'register_meta_box_cb' => array($this, 'add_metaboxes'), 
      'menu_icon'    => 'dashicons-calendar-alt', 
      'supports'    => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments') 
     ); 
     register_post_type('events',$args); 
    } 

    public function add_metaboxes() { 
     add_meta_box('wpt_events_date', 'Events Date', array($this, 'the_metabox'), 'events', 'side', 'high'); 
    } 

    public function the_metabox($post) { // No need for "global $post", it's passed as parameter 
     wp_nonce_field('events_date_fromto', 'events_datefromto_nonce'); 
     $dates = get_post_meta($post->ID, '_fisa_events_date', true); 
     $from = $dates ? $dates[0] : false; 
     $to = $dates ? $dates[1] : false; 
     echo '<label for="_fisa_date_from">Date From</label>'; 
     printf(
      '<input id="fisa-event-datefrom" type="text" name="_fisa_date_from" class="widefat" value="%s" />', 
      $from ? $from : '' 
     ); 
     echo ''; 
     echo '<br/><br/>'; 
     echo '<label for="_fisa_date_to">Date To</label>'; 
     printf(
      '<input id="fisa-event-dateto" type="text" name="_fisa_date_to" class="widefat" value="%s" />', 
      $to ? $to : '' 
     ); 
    } 

    public function save_post($post_id, $post_object) { // second parameter has useful info about current post 
     /* BRUTE FORCE debug */ 
     // wp_die(sprintf('<pre>%s</pre>', print_r($_POST, true))); 

     /** 
     * ADD SECURITY AND CONTENT CHECKS, omitted for brevity 
     */ 
     if(!empty($_POST['_fisa_date_from'])) { 
      $events_date = array(
           sanitize_text_field($_POST['_fisa_date_from']), 
           sanitize_text_field($_POST['_fisa_date_to']) 
          ); 
      update_post_meta($post_id, '_fisa_events_date', $events_date); 
     } 
    } 
} 
new MyEvents();