我正在使用Members插件管理自定义角色的功能，该角色只能编辑/发布我在函数中创建的自定义帖子类型。php文件。在做了很多工作之后，我实现了这一点，除了预览按钮不起作用，而且（更糟糕的是）阻止保存/发布自定义帖子。

只要我不点击预览按钮，一切都正常。但当我单击预览按钮时，预览选项卡不会显示自上次保存以来所做的任何更改。然后，当我按“发布/更新”按钮时，我的更改不会保存/发布，而是加载到“预览”选项卡中，就像我按了“预览”一样。在我使用WordPress编辑帖子的浏览器选项卡中，没有其他任何事情发生，更新/发布按钮旁边的微调器一直在旋转。

从我的管理员帐户中，一切都很正常，如果我给自定义角色“edit\\u posts”功能，就可以解决这个问题。因此，这个角色的自定义功能似乎出了问题，但我无法理解。

下面是我的函数代码。php。谢谢你的建议。

// Register Custom Post Type
function mnp_custom_post_type() {
$labels = array(
    \'name\'                => \'Wiki Pages\',
    \'singular_name\'       => \'Wiki Page\',
    \'menu_name\'           => \'Wiki Pages\',
    \'parent_item_colon\'   => \'Parent Wiki Page:\',
    \'all_items\'           => \'All Wiki Pages\',
    \'view_item\'           => \'View Wiki Page\',
    \'add_new_item\'        => \'Add New Wiki Page\',
    \'add_new\'             => \'New Wiki Page\',
    \'edit_item\'           => \'Edit Wiki Page\',
    \'update_item\'         => \'Update Wiki Page\',
    \'search_items\'        => \'Search wiki pages\',
    \'not_found\'           => \'No wiki pages found\',
    \'not_found_in_trash\'  => \'No wiki pages found in Trash\',
);

$rewrite = array(
    \'slug\'                => \'wiki\',
    \'with_front\'          => false,
    \'pages\'               => true,
    \'feeds\'               => true,
);

$capabilities = array(
    \'edit_post\'           => \'edit_wiki_page\',
    \'read_post\'           => \'read_wiki_page\',
    \'delete_post\'         => \'delete_wiki_page\',
    \'edit_posts\'             => \'edit_wiki_pages\',
    \'edit_others_posts\'      => \'edit_others_wiki_pages\',
    \'publish_posts\'          => \'publish_wiki_pages\',
    \'read_private_posts\'     => \'read_private_wiki_pages\',
    \'delete_posts\'           => \'delete_wiki_pages\',
    \'delete_private_posts\'   => \'delete_private_wiki_pages\',
    \'delete_published_posts\' => \'delete_published_wiki_pages\',
    \'delete_others_posts\'    => \'delete_others_wiki_pages\',
    \'edit_private_posts\'     => \'edit_private_wiki_pages\',
    \'edit_published_posts\'   => \'edit_published_wiki_pages\',
);

$args = array(
    \'label\'               => \'wiki_page\',
    \'description\'         => \'Wiki pages\',
    \'labels\'              => $labels,
    \'supports\'            => array( \'title\', \'editor\', \'revisions\', ),
    \'taxonomies\'          => array( \'category\', \'post_tag\' ),
    \'hierarchical\'        => false,
    \'public\'              => true,
    \'show_ui\'             => true,
    \'show_in_menu\'        => true,
    \'show_in_nav_menus\'   => true,
    \'show_in_admin_bar\'   => true,
    \'menu_position\'       => 25,
    \'menu_icon\'           => \'\',
    \'can_export\'          => true,
    \'has_archive\'         => true,
    \'exclude_from_search\' => false,
    \'publicly_queryable\'  => true,
    \'rewrite\'             => $rewrite,
    \'capabilities\'        => $capabilities,
);

register_post_type( \'wiki_page\', $args );
}

// Hook into the \'init\' action
add_action( \'init\', \'mnp_custom_post_type\', 0 );

// map meta capabilities
add_filter( \'map_meta_cap\', \'my_map_meta_cap\', 10, 4 );

function my_map_meta_cap( $caps, $cap, $user_id, $args ) {

/* If editing, deleting, or reading a wiki_page, get the post and post type object. */
if ( \'edit_wiki_page\' == $cap || \'delete_wiki_page\' == $cap || \'read_wiki_page\' == $cap ) {
    $post = get_post( $args[0] );
    $post_type = get_post_type_object( $post->post_type );

    /* Set an empty array for the caps. */
    $caps = array();
}

/* If editing a wiki_page, assign the required capability. */
if ( \'edit_wiki_page\' == $cap ) {
    if ( $user_id == $post->post_author )
        $caps[] = $post_type->cap->edit_posts;
    else
        $caps[] = $post_type->cap->edit_others_posts;
}

/* If deleting a wiki_page, assign the required capability. */
elseif ( \'delete_wiki_page\' == $cap ) {
    if ( $user_id == $post->post_author )
        $caps[] = $post_type->cap->delete_posts;
    else
        $caps[] = $post_type->cap->delete_others_posts;
}

/* If reading a private wiki_page, assign the required capability. */
elseif ( \'read_wiki_page\' == $cap ) {

    if ( \'private\' != $post->post_status )
        $caps[] = \'read\';
    elseif ( $user_id == $post->post_author )
        $caps[] = \'read\';
    else
        $caps[] = $post_type->cap->read_private_posts;
}

/* Return the capabilities required by the user. */
return $caps;
}