WordPress 如何安全地更改自定义帖子类型的名称？

问题描述

我做了一个名为’portfolio’ 的自定义帖子类型，但我想将其更改为’projects’ 。为了安全地更改名称并阻止自定义帖子类型的帖子在信息中心中消失，我需要采取哪些具体步骤？

注意：portfolio 中已经有帖子，所以我不能用 projects 来切换 portfolio 。

/* Register Portfolio Post Type */
add_action('init', 'create_portfolio');

function create_portfolio() {

    $labels = array(
        'name' => __('Portfolio', 'post type general name'),
        'singular_name' => __('Project', 'post type singular name'),
        'add_new' => __('Add New', 'portfolio item'),
        'add_new_item' => __('Add New Project'),
        'edit_item' => __('Edit Project'),
        'new_item' => __('New Project'),
        'view_item' => __('View Project'),
        'search_items' => __('Search Projects'),
        'not_found' =>  __('Nothing found'),
        'not_found_in_trash' => __('Nothing found in Trash'),
        'parent_item_colon' => ''
    );

    $args = array(
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true,
        'query_var' => true,
        'rewrite' => true,
        'capability_type' => 'post',
        'hierarchical' => false,
        'menu_position' => null,
        'supports' => array('title','editor','thumbnail')
      );

    register_post_type( 'portfolio' , $args );
}

/* Register Skills Taxonomy */
register_taxonomy("Skills", array("portfolio"), array("hierarchical" => true, "label" => "Skills", "singular_label" => "Skill", "rewrite" => true));

/* Add Fields */
add_action("admin_init", "add_portfolio_fields");

function add_portfolio_fields(){
    add_meta_box("website_url", "Website URL", "website_url", "portfolio", "side", "low");
    add_meta_box("view_more", "View More", "view_more", "portfolio", "side", "low");
    add_meta_box("screenshot_name", "Screenshot Name", "screenshot_name", "portfolio", "side", "low");
    add_meta_box("thumbnail_name", "Thumbnail Name", "thumbnail_name", "portfolio", "side", "low");
    add_meta_box("thumbnail_alt", "Thumbnail Alt", "thumbnail_alt", "portfolio", "side", "low");
}

function website_url(){
    global $post;
    $custom = get_post_custom($post->ID);
    $website_url = $custom["website_url"][0];
    ?>
    <label>Website URL:</label>
    <input size="50" name="website_url" value="<?php echo $website_url; ?>" />
    <?php
}

function view_more() {
    global $post;
    $custom = get_post_custom($post->ID);
    $view_more = $custom["view_more"][0];
    ?>
    <label>View More:</label>
    <input size="50" name="view_more" value="<?php echo $view_more; ?>" />
    <?php
}

function screenshot_name() {
    global $post;
    $custom = get_post_custom($post->ID);
    $screenshot_name = $custom["screenshot_name"][0];
    ?>
    <label>Screenshot Name:</label>
    <input name="screenshot_name" value="<?php echo $screenshot_name; ?>" />
    <?php
}

function thumbnail_name() {
    global $post;
    $custom = get_post_custom($post->ID);
    $thumbnail_name = $custom["thumbnail_name"][0];
    ?>
    <label>Thumbnail Name:</label>
    <input name="thumbnail_name" value="<?php echo $thumbnail_name; ?>" />
    <?php
}

function thumbnail_alt() {
    global $post;
    $custom = get_post_custom($post->ID);
    $thumbnail_alt = $custom["thumbnail_alt"][0];
    ?>
    <label>Thumbnail Alt:</label>
    <input name="thumbnail_alt" value="<?php echo $thumbnail_alt; ?>" />
    <?php
}

add_action('save_post', 'save_portfolio_details');

function save_portfolio_details(){
    global $post;

    update_post_meta($post->ID, "website_url", $_POST["website_url"]);
    update_post_meta($post->ID, "view_more", $_POST["view_more"]);
    update_post_meta($post->ID, "screenshot_name", $_POST["screenshot_name"]);
    update_post_meta($post->ID, "thumbnail_name", $_POST["thumbnail_name"]);
    update_post_meta($post->ID, "thumbnail_alt", $_POST["thumbnail_alt"]);
}

/* Custom Columns */
add_action("manage_posts_custom_column",  "portfolio_custom_columns");
add_filter("manage_edit-portfolio_columns", "portfolio_edit_columns");

function portfolio_edit_columns($columns){
    $columns = array(
        "cb" => "<input type="checkbox" />",
        "title" => "Project Title",
        "description" => "Description",
    );

    return $columns;
}

function portfolio_custom_columns($column){
    global $post;

    switch ($column) {
        case "description":
        the_excerpt();
        break;
    }
}

最佳解决方案

如果您的投资组合中没有任何职位。

这真的很简单将”Portfolio” 重新命名为”Projects” 。你会失去任何东西，改变名字。

编辑：

尝试使用此插件 http://wordpress.org/extend/plugins/ptypeconverter/安全导出当前帖子并将其导入新的自定义帖子类型。

所以步骤是：

1 下载并使用插件：http://wordpress.org/extend/plugins/ptypeconverter/

2 复制您的自定义帖子类型”portfolio” 文件保存。称它为 portfolio_post_typeBACKUP.php

3 现在您确定此方法失败。你可以恢复它。

4 将”portfolio” 更改为”projects”

5 用插件和中提琴导入帖子！

希望这个工作。

次佳解决方案

您也可以直接使用 MySQL 。

UPDATE `wp_posts`
SET
    # Update the post_type column
    `post_type` = REPLACE(`post_type`,'name_of_old_post_type','name_of_new_post_type'),
    # Update the urls
    `guid` = REPLACE(`guid`,'name_of_old_post_type','name_of_new_post_type')
WHERE `post_type` = 'name_of_old_post_type'

两件事要注意：

您需要更新代码中对此帖子类型的任何引用 (例如，模板，CMB2 定义或分类定义) 。
如果您已经在 wp_postmeta 中存储了任何对序列化数组中的引用的引用，那么您不需要执行简单的 UPDATE /REPLACE，因为它将会被炸毁！那么，除非新旧帖子类型的字符串是完全相同的长度。

第三种解决方案

扩展 Will 的答案有一点进一步…，特别是如果你从你的插件做：

global $wpdb;
$old_post_types = array('old_type' => 'new_type');
foreach ($old_post_types as $old_type=>$type) {
    $wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->posts} SET post_type = REPLACE(post_type, %s, %s)
                         WHERE post_type LIKE %s", $old_type, $type, $old_type ) );
    $wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->posts} SET guid = REPLACE(guid, %s, %s)
                         WHERE guid LIKE %s", "post_type={$old_type}", "post_type={$type}", "%post_type={$type}%" ) );
    $wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->posts} SET guid = REPLACE(guid, %s, %s)
                         WHERE guid LIKE %s", "/{$old_type}/", "/{$type}/", "%/{$old_type}/%" ) );
}

这里的更改是不直接替换 guid 中的旧类型，只有当”post_type=old_type” 或”/old_type/” 存在时才更换。这样可以避免错误地替换有效的 s 。。 (例如您的自定义帖子类型是投资组合，一个页面的 lug lug 也有投资组合)

另一个选择是做这样的事情：

global $wpdb, $wp_rewrite;
foreach ($old_post_types as $old_type=>$type) {
    $q = 'numberposts=-1&post_status=any&post_type='.$old_type;
    $items = get_posts($q);
    foreach ($items as $item) {
        $update['ID'] = $item->ID;
        $update['post_type'] = $type;
        wp_update_post( $update );
    }
}
$wp_rewrite->flush_rules();

HTH！

参考文献

How do I safely change the name of a custom post type?

注：本文内容整合自 Google/Baidu/Bing 辅助翻译的英文资料结果。如果您对结果不满意，可以加入我们改善翻译效果：薇晓朵技术论坛。

WordPress 如何安全地更改自定义帖子类型的名称？