如何动态分配作者在WordPress中发布？

Question

I'm creating a WordPress plugin which has a custom meta-box that lists checkboxes of authors and contributors. When checked, the list shows up on frontend at the end of the post. What I need to do is: When user clicks the name of a contributor, it reverts to archives page, but the post isn't listed under the name of that contributors.

How can I update and save a post under multiple contributors so that it is showed under the author's archives page?

This is the custom meta-box callback function and the function which is called when the post is saved:

function cd_meta_box_cb($post)
{
    global $post;
    echo'<b> Select the contributors that have contributed to this post: </b>';
    echo '<br><br>';
    wp_nonce_field('my_meta_box_nonce', 'meta_box_nonce');
    global $wpdb;

    $authors=$wpdb->get_results("SELECT wp_users.ID, wp_users.user_nicename 
    FROM wp_users INNER JOIN wp_usermeta 
    ON wp_users.ID = wp_usermeta.user_id 
    WHERE wp_usermeta.meta_key = 'wp_capabilities' 
    AND wp_usermeta.meta_value LIKE '%author%' OR wp_usermeta.meta_value LIKE '%editor%'  
    ORDER BY wp_users.user_nicename");

    $current_user = wp_get_current_user();
    foreach ($authors as $author) {
        $author_info=get_userdata($author->ID);
        //$author_role=$author_info->roles;
        $author_first_name=$author_info->first_name;
        $author_last_name=$author_info->last_name;
        if(strcmp($current_user->user_nicename,$author->user_nicename)==0)
        {       
            echo"<input type='checkbox' id='my_meta_box_check' name='my_meta_box_check[]'";
            echo"value=";
            the_author_meta('user_nicename', $author->ID);
            echo" checked disabled>";

            echo"<input type='hidden' id='my_meta_box_check' name='my_meta_box_check[]'";
            echo"value=";
            the_author_meta('user_nicename', $author->ID);
            echo">";
        }
        else
        {
            echo"<input type='checkbox' id='my_meta_box_check' name='my_meta_box_check[]'";
            echo"value=";
            the_author_meta('user_nicename', $author->ID);
            echo">";    
        }
        echo $author_first_name ." ". $author_last_name ." ";
        echo"(";
        echo"<label id='labelid' for='author'>";
        the_author_meta('user_nicename', $author->ID);
        echo"</label>";
        echo")";
        echo "<br />";
    }
}
//save custom data when our post is saved
function save_custom_data($post_id)
{
    global $post,$wpdb;

    $contributor=get_post_meta($post->ID, 'my_meta_box_check', true);
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
    if (!isset($_POST['meta_box_nonce']) || !wp_verify_nonce($_POST['meta_box_nonce'], 'my_meta_box_nonce')) return;
    if (!current_user_can('edit_post')) return;
    if (isset($_POST['my_meta_box_check'])) 
    {
        update_post_meta($post_id, 'my_meta_box_check', $_POST['my_meta_box_check']);
        $tablename = $wpdb->prefix.'authorlist';
        $wpdb->insert($tablename,array('authorname'=>$post_id,'authorpost'=>$contributor));
    }
    else 
    {
        delete_post_meta($post_id, 'my_meta_box_check');
    }
}

add_action('save_post', 'save_custom_data');

Answer 1

Add this to your theme's 'functions.php' or plugin.

add_action( 'pre_get_posts', 'modify_author_query' );

function modify_author_query( $query ) {
    // check if on front-end and author query is modified
    if ( ! is_admin() && is_main_query() && $query->is_author() ) {
        $author_name =  $query->query_vars['author_name'];
        //$userdata = get_user_by('slug',$author_name);
        //$userid = $user->ID;

        $meta_query = array(  
            array(
                'key' => 'my_meta_box_check',
                'value' => $author_name,
                'compare' => 'LIKE'
            )
        );
        $query->set( 'meta_query', $meta_query );

        // unset the default author since we are using custom meta
        unset( $query->query_vars['author_name'] );
    }
}

Please note that above may show wrong results if part of a user name matches with another - try saving the data as comma separated string (should begin and end with comma) and replace 'value' => $author_name with 'value' => ','.$author_name.','.