Can’t publish custom post type – “You are not allowed to edit this post.”

3 comments

1. The default for map_meta_cap is actually not false if you’re also passing in a capability_type of post or page, which you are.

   The following code is in WordPress Core’s post.php:

   // Back compat with quirky handling in version 3.0. #14122
   if ( empty( $args->capabilities ) && null === $args->map_meta_cap && in_array( $args->capability_type, array( 'post', 'page' ) ) )
       $args->map_meta_cap = true;
   

   So by explicitly setting it to false, you were telling it not to use the capabilities of a post or page.

   By not setting it at all, you allowed the above code to set it to true.

   Code just a few lines down, get_post_type_capabilities uses this flag for whether or not to use the default posts capabilities which gives you the permissions you’re looking for.

2. The CPT is now working. I’m not sure why it’s working but it is and here’s what happened for me to make it start working. Well I saw @hawkidoki’s “answer” and how he didn’t use variables so I reformatted mine to look the same (below) and ran it and it didn’t work until I commented out map_meta_cap:

   <?php
   function image_post_type(){
   
       register_post_type('image_post', array(
                   'labels'                =>  array(
                                                   'name'              =>  'Images',
                                                   'singlular_name'    =>  'Image',
                                                   'add_new'           =>  'Add New',
                                                   'add_new_item'      =>  'Add New Image',
                                                   'edit_item'         =>  'Edit Image',
                                                   'new_item'          =>  'New Image',
                                                   'all_items'         =>  'All Images',
                                                   'view_item'         =>  'View Image',
                                                   'search_items'      =>  'Search Images',
                                                   'not_found'         =>  'No Images found',
                                                   'not_found_in_trash'=>  'No Images found in Trash', 
                                                   'parent_item_colon' =>  '',
                                                   'menu_name'         =>  'Images'
                                               ),
                   'public'                =>  true,
                   'exclude_from_search'   =>  false,
                   'publicly_queryable'    =>  true,
                   'show_ui'               =>  true,
                   'show_in_nav_menus'     =>  true,
                   'show_in_menu'          =>  true,
                   'menu_position'         =>  1,
                   //'menu_icon'               =>  'icon32',
                   'capability_type'       =>  'post',
                   //'map_meta_cap'            =>  false,
                   'hierarchical'          =>  false,
                   'supports'              =>  array('title', 'editor', 'thumbnail', 'custom-fields'),
                   'register_meta_box_cb'  =>  'add_meta_box_callback',
                   'has_archive'           =>  true,
                   'query_var'             =>  true,
                   'can_export'            =>  true
               )
   );
   }
   add_action('init', 'image_post_type');
   
   function add_meta_box_callback(){
       add_meta_box('image_variations', 'Image Variations', 'image_variations_callback', 'image_post', 'side', 'low');
   }
   
   function image_variations_callback(){
   
   }
   
   function add_image_post_type_to_query($query){
       if(is_home() && $query->is_main_query()){
           $query->set( 'post_type', array('post', 'page', 'image_post') );
       }
       return $query;
   }
   ?>
   

   Seeing this, I reverted back to my old code and uncommented map_meta_cap once again to get the same “You’re not allowed” message. Upon commenting it out again though it works fine and my final working code is:

   <?php
   function image_post_type(){
       $labels = array(
                   'name'              =>  'Images',
                   'singlular_name'    =>  'Image',
                   'add_new'           =>  'Add New',
                   'add_new_item'      =>  'Add New Image',
                   'edit_item'         =>  'Edit Image',
                   'new_item'          =>  'New Image',
                   'all_items'         =>  'All Images',
                   'view_item'         =>  'View Image',
                   'search_items'      =>  'Search Images',
                   'not_found'         =>  'No Images found',
                   'not_found_in_trash'=>  'No Images found in Trash', 
                   'parent_item_colon' =>  '',
                   'menu_name'         =>  'Images'
               );
   
       $args = array(
                   'labels'                =>  $labels,
                   'public'                =>  true,
                   'exclude_from_search'   =>  false,
                   'publicly_queryable'    =>  true,
                   'show_ui'               =>  true,
                   'show_in_nav_menus'     =>  true,
                   'show_in_menu'          =>  true,
                   'menu_position'         =>  1,
                   //'menu_icon'               =>  'icon32',
                   'capability_type'       =>  'post',
                   //'map_meta_cap'            =>  false,
                   'hierarchical'          =>  false,
                   'supports'              =>  array('title', 'editor', 'thumbnail', 'custom-fields'),
                   'register_meta_box_cb'  =>  'add_meta_box_callback',
                   'has_archive'           =>  true,
                   'query_var'             =>  true,
                   'can_export'            =>  true
               );
   
       register_post_type('image_post', $args);
   }
   add_action('init', 'image_post_type');
   
   function add_meta_box_callback(){
       add_meta_box('image_variations', 'Image Variations', 'image_variations_callback', 'image_post', 'side', 'low');
   }
   
   function image_variations_callback(){
   
   }
   
   function add_image_post_type_to_query($query){
       if(is_home() && $query->is_main_query()){
           $query->set( 'post_type', array('post', 'page', 'image_post') );
       }
       return $query;
   }
   ?>
   

   Why though? How could map_meta_cap be causing this issue when it’s set to false? False is supposed to be the default value.

   Thanks for all your help guys, especially you @vancoder!

3. Here is a working custom_post_type declaration. Try to modify it to fit your needs 🙂

   function custom_post_example() { 
       register_post_type( 'my_post_type',
           array('labels' => array(
               'name' => 'my_post_type',
               'singular_name' => 'my_post_type',
               'all_items' => 'All my_post_type',
               'add_new' => 'Add New my_post_type',
               'add_new_item' => 'Add New my_post_type',
               'edit' => 'Edit',
               'edit_item' => 'Edit Task',
               'new_item' => 'New Task',
               'view_item' => 'View Task',
               'search_items' => 'Search Task',
               'not_found' =>  'Nothing found in the Database.',
               'not_found_in_trash' => 'Nothing found in Trash',
               'parent_item_colon' => 'Parent Task Category'
               ),
               'description' => 'This is the my_post_type description',
               'public' => true,
               'publicly_queryable' => true,
               'exclude_from_search' => false,
               'show_ui' => true,
               'query_var' => true,
               'menu_position' => 5,
               'menu_icon' => get_stylesheet_directory_uri() . '......./.......png',
               'rewrite'   => array( 'slug' => 'my_post_type', 'with_front' => true ),
               'has_archive' => true,
               'capability_type' => 'page',
               'hierarchical' => true,
               'supports' => array( 'title', 'author', 'page-attributes')
           )
       );
   
   }
   add_action( 'init', 'custom_post_example');
   

   Good luck sir!

   Edit: More informations here – http://codex.wordpress.org/Function_Reference/register_post_type

Comments are closed.