WordPress：自定义帖子类型的功能 [英] WordPress: Capabilities for custom post types

问题描述

我正在编写一个可创建自定义post_type的插件。我还希望该插件创建一个自定义角色，该角色只能添加/编辑/删除新的post_type。我尝试了几个插件（Role Scoper，高级访问管理器），它们允许我重新定义或创建新角色，但不允许我为新的post_type分配功能。例如，我想允许添加/编辑新的post_type而不是普通的帖子/页面。

I'm writing a plugin which creates a custom post_type. I'd also like the plugin to create a custom role which can only add/edit/delete the new post_type. I've tried several plugins (Role Scoper, Advanced Access manager) and they allow me to redefine or create new roles, but they don't allow me to assign capabilities specific to the new post_type. For example, I want to allow the ability to add/edit my new post_type but NOT normal posts/pages.

根据我的阅读，我可以添加新角色使用 add_role（）函数。此功能的参数之一是似乎在此处定义的功能数组。我认为我需要的是能够添加特定于MY post_type的功能。

From what I've read, I can add new roles with the add_role() function. One of the parameters of this function is an array of "capabilities" which appear to be defined here. I think what I need is to be able to add my capabilities that are specific to MY post_type. Is this possible?

推荐答案

自定义帖子类型的功能

函数 register_post_type（） 需要一个 $ capabilities 数组作为其（可选）参数之一。

Capabilities for Custom Post Types

The function register_post_type() takes a $capabilities array as one of its (optional) arguments.

它看起来可能像这样：

$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代表您的帖子类型。

where "ypt" stands for "your post type".

此后，您可以在WordPress中添加具有以下确切功能的新角色（可能还有一些标准WordPress功能）：

Thereafter you could add a new role to your WordPress that has these exact capabilities (and possibly some more of the standard WordPress capabilities):

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，请查看成员插件。

The latter can be done using plugins though, check out the Members plugin by Justin Tadlock, for instance.

为您提供一个更具体的示例：

To give you a more concrete example:

/* 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;
}

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