但我想允许基本旅行者角色用户仅创建和编辑旅行者帖子。我该怎么做？

问题是，您有两种不同的帖子类型（帖子和旅行者），许多角色（默认角色加上基本的旅行者），但只有一组功能（默认功能）。

您需要做的是定义一组新的功能，这些功能将映射到您的新角色。这里有一个基本插件，它将添加一个新角色，定义新功能，将这些功能映射到新角色，并将所有新功能分配给管理员。

stackexchange示例。php：

这是我所有插件的主插件文件。它所做的就是为激活、停用和加载的插件添加挂钩。

<?php
/**
 * Plugin Name: Stackexchange Sample
 * Author: Nathan Johnson
 * Licence: GPL2+
 * Licence URI: https://www.gnu.org/licenses/gpl-2.0.en.html
 * Domain Path: /languages
 * Text Domain: stackexchange-sample
 */

//* Don\'t access this file directly
defined( \'ABSPATH\' ) or die();

//* Start bootstraping the plugin
require( dirname( __FILE__ ) . \'/bootstrap.php\' );
add_action( \'plugins_loaded\',
  [ $bootstrap = new \\Stackexchange\\bootstrap(), \'register\' ] );

//* Register activation and deactivation hooks
register_activation_hook( __FILE__ , [ $bootstrap, \'activation\' ] );
register_deactivation_hook( __FILE__ , [ $bootstrap, \'deactivation\' ] );

引导。php

在引导文件中，我们有激活和停用的方法。在激活方法中，我们添加了一个新角色，为其分配了一些功能，然后确保管理员可以使用这些新功能执行所有操作。停用方法与此相反。

唯一的其他方法是寄存器。这里我们添加了一个钩子来注册我们的自定义帖子类型。

<?php
namespace Stackexchange;

class bootstrap {

  public function register() {
    require( dirname( __FILE__ ) . \'/custom-post-type.php\' );
    add_action( \'init\', [ new custom_post_type(), \'register\' ] );
  }

  public function activation() {
    require( dirname( __FILE__ ) . \'/capabilities.php\' );

    $caps = new capabilities( \'traveller\' );
    $caps->add( [
      \'edit_\',
      \'read_\',
      \'delete_\',
      \'edit_s\',
      \'publish_s\',
      \'edit_published_s\',
    ] );

    add_role( \'basic_traveller\', __( \'Basic Traveller\' ), $caps->caps() );

    $admin = get_role( \'administrator\' );
    foreach( $caps->caps() as $cap => $val )
      $admin->add_cap( $cap );
  }

  public function deactivation() {
    remove_role( \'basic_traveller\' );

    $admin = get_role( \'administrator\' );
    $caps = new capabilities( \'traveller\' );
    foreach( $caps->caps() as $cap => $val ) {
      $admin->remove_cap( $cap );
    }
  }
}

能力。php

capabilities类只允许用户轻松定义与新帖子类型交互所需的所有功能。

<?php
namespace Stackexchange;

class capabilities {

  protected $capabilities = [
    //* Meta capabilities
    \'edit_\'              => false,
    \'read_\'              => false,
    \'delete_\'            => false,

    //* Primitive capabilities used outside of map_meta_cap()
    \'edit_s\'             => false,
    \'edit_others_s\'      => false,
    \'publish_s\'          => false,
    \'read_private_s\'     => false,

    //* Primitive capabilities used within of map_meta_cap()
    \'delete_s\'           => false,
    \'delete_private_s\'   => false,
    \'delete_published_s\' => false,
    \'delete_others_s\'    => false,
    \'edit_private_s\'     => false,
    \'edit_published_s\'   => false,
  ];

  public function __construct( $name ) {
    $this->name = $name;
    foreach( $this->capabilities as $key => $val ) {
      $capabilities[ $this->strl_replace( "_", "_{$this->name}", $key ) ] = $val;
    }
    $this->capabilities = $capabilities;
  }

  public function add( $caps = [] ) {
    foreach( $caps as $key ) {
      $this->capabilities[ $this->strl_replace( "_", "_{$this->name}", $key ) ] = true;
    }
  }

  public function caps() {
    return $this->capabilities;
  }

  protected function strl_replace( $search, $replace, $subject ) {
    $pos = strrpos( $subject, $search );
    if( false !== $pos ) {
      $key = substr_replace( $subject, $replace, $pos, strlen( $search ) );
    }
    return $key;
  }
}

自定义帖子类型。php

最后，我们注册自定义的post类型。注意map_meta_cap 是真的。

<?php
namespace Stackexchange;

class custom_post_type {
  public function register() {
    $labels = [
      \'name\'          => __( \'Traveller Posts\' ),
      \'singular_name\' => __( \'Traveller_Post\' ),
    ];
    $args = [
      \'labels\'          => $labels,
      \'public\'          => true,
      \'has_archive\'     => true,
      \'capability_type\' => \'traveller\',
      \'map_meta_cap\'    => true,
    ];
    register_post_type( \'travellers\', $args );
  }
}

basic\\u traveller角色的用户将能够发布和编辑Traveler帖子，但不能对任何其他类型的帖子执行任何操作。