WordPress:自定义帖子类型的功能

Question

我正在编写一个创建自定义post_type的插件.我也喜欢这个插件来创建一个自定义角色,只能添加/编辑/删除新的post_type.我已经尝试了几个插件(Role Scoper,高级访问管理器),它们允许我重新定义或创建新角色,但是它们不允许我分配特定于新post_type的功能.例如,我想允许添加/编辑我的新post_type但不是正常的帖子/页面.

根据我的阅读,我可以使用add_role()函数添加新角色.此函数的一个参数是"功能"数组,似乎在此处定义.我认为我需要的是能够添加我的post_type特有的功能.这可能吗？

Answer 1

自定义帖子类型的功能

该函数register_post_type()将$capabilities数组作为其(可选)参数之一.

它可能看起来像这样:

$capabilities = array(
    'publish_posts' => 'publish_ypts',
    'edit_posts' => 'edit_ypts',
    'edit_others_posts' => 'edit_others_ypts',
    'delete_posts' => 'delete_ypts',
    'delete_others_posts' => 'delete_others_ypts',
    'read_private_posts' => 'read_private_ypts',
    'edit_post' => 'edit_ypt',
    'delete_post' => 'delete_ypt',
    'read_post' => 'read_ypt'
);

其中"ypt"代表"你的帖子类型".

此后,您可以为具有这些确切功能的WordPress添加新角色(可能还有一些标准的WordPress功能):

add_role(
    'ypt_author',
    'Author of your post type',
    array(
        'publish_ypts' => true,
        'edit_ypts' => true,
        'edit_others_ypts' => true,
        'delete_ypts' => true,
        'delete_others_ypts' => true,
        'read_private_ypts' => true,
        'edit_ypt' => true,
        'delete_ypt' => true,
        'read_ypt' => true,
        // more standard capabilities here
    )
);

后者可以使用插件完成,例如,查看Justin Tadlock 的Members插件.

彻底的例子

为了给你一个更具体的例子:

/* REGISTER POST TYPE */

add_action('init', 'ypt_register');

function ypt_register()
{

    $labels = array(
        'name' => _x('YPTs', 'post type general name'),
        'singular_name' => _x('YPT', 'post type singular name'),
        'add_new' => _x('Add New YPT', 'Team item'),
        'add_new_item' => __('Add a new post of type YPT'),
        'edit_item' => __('Edit YPT'),
        'new_item' => __('New YPT'),
        'view_item' => __('View YPT'),
        'search_items' => __('Search YPTs'),
        'not_found' =>  __('No YPTs found'),
        'not_found_in_trash' => __('No YPTs currently trashed'),
        'parent_item_colon' => ''
    );

    $capabilities = array(
        // this is where the first code block from above goes
    );

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

    register_post_type( 'ypt' , $args );

    flush_rewrite_rules( false );
}


/* MAP META CAPABILITIES */

add_filter( 'map_meta_cap', 'ypt_map_meta_cap', 10, 4 );

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

    if ( 'edit_ypt' == $cap || 'delete_ypt' == $cap || 'read_ypt' == $cap ) {
        $post = get_post( $args[0] );
        $post_type = get_post_type_object( $post->post_type );
        $caps = array();
    }

    if ( 'edit_ypt' == $cap ) {
        if ( $user_id == $post->post_author )
            $caps[] = $post_type->cap->edit_posts;
        else
            $caps[] = $post_type->cap->edit_others_posts;
    }

    elseif ( 'delete_ypt' == $cap ) {
        if ( $user_id == $post->post_author )
            $caps[] = $post_type->cap->delete_posts;
        else
            $caps[] = $post_type->cap->delete_others_posts;
    }

    elseif ( 'read_ypt' == $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 $caps;
}

Answer 2

如今(WP 3.5+),它更容易.只需设置map_meta_cap参数TRUE并在注册帖子类型时string为capability_type参数选择(通常是帖子类型名称).

一个简单的var_dump( $GLOBALS['wp_post_types']['new_custom_post_type'] ) );将显示如下的内容.

[cap] => stdClass Object
(
    [edit_post]      => "edit_{$capability_type}"
    [read_post]      => "read_{$capability_type}"
    [delete_post]        => "delete_{$capability_type}"
    [edit_posts]         => "edit_{$capability_type}s"
    [edit_others_posts]  => "edit_others_{$capability_type}s"
    [publish_posts]      => "publish_{$capability_type}s"
    [read_private_posts]     => "read_private_{$capability_type}s"
        [delete_posts]           => "delete_{$capability_type}s"
        [delete_private_posts]   => "delete_private_{$capability_type}s"
        [delete_published_posts] => "delete_published_{$capability_type}s"
        [delete_others_posts]    => "delete_others_{$capability_type}s"
        [edit_private_posts]     => "edit_private_{$capability_type}s"
        [edit_published_posts]   => "edit_published_{$capability_type}s"
)

在更期望的阵列部分是第7个其他原语功能不是由核心检查,但由映射map_meta_caps()后类型注册期间.