WordPress admin post list modifizieren

Allgemein

• https://www.smashingmagazine.com/2013/12/modifying-admin-post-lists-in-wordpress/

Spalte der Listenansicht des Custom Post Type hinzufügen

https://www.ractoon.com/wordpress-sortable-admin-columns-for-custom-posts/

Um die Custom Fields eines Custom Post Type anzuzeigen sind zwei Schritte notwendig:

1. Custom Column(s) registrieren
2. Custom Column(s) anzeigen

Beispielcode um Custom Column(s) zu registrieren

// Register custom columns to WordPress Backend CPT Listing
add_filter( 'manage_mycpt_posts_columns', 'set_custom_edit_mycpt_columns' );

function set_custom_edit_mycpt_columns( $columns ) {

  // unset to order it last
  unset($columns['date']);

  // register custom columns
  $columns['photo'] = __( 'Photo', 'my-text-domain' );
  $columns['custom_taxonomy'] = __( 'Custom Taxonomy', 'my-text-domain' );
  $columns['acf_field'] = __( 'ACF Field', 'my-text-domain' );
  // end register custom columns

  // ready to order it last
  $columns['date'] = $date;

  return $columns;
}

Beispielcode um Custom Column(s) anzuzeigen

// Display custom columns in WordPress Backend CPT Listing
add_action( 'manage_mycpt_posts_custom_column' , 'custom_mycpt_column', 10, 2 );

function custom_mycpt_column( $column, $post_id ) {
  switch ( $column ) {

    // Display a thumbnail photo
    case 'photo' :
      echo get_the_post_thumbnail( $post_id, 'thumbnail' );
      break;

    // Display a list of the custom taxonomy terms assigned to the post 
    case 'custom_taxonomy' :
      $terms = get_the_term_list( $post_id , 'my_custom_taxonomy' , '' , ', ' , '' );
      echo is_string( $terms ) ? $terms : '—';
      break;

    // Display the value of an ACF (Advanced Custom Fields) field
    case 'acf_field' :
      echo get_field( 'my_acf_field', $post_id );  
      break;

    // Display the value of an ACF (Advanced Custom Fields) array field
    case 'acf_field' :
      $var = get_field( 'my_acf_field', $post_id );
      echo implode(", ", $var);
      break;

    // Display the value of an related ACF (Advanced Custom Fields) field of an related Post Object
    case 'location-title' :
      echo get_the_title(get_field( 'contact-location', $post_id));
      break;

    // Display the value of an related ACF (Advanced Custom Fields) field of an ACF field
    case 'location-country' :
      echo get_field('location-country',get_field( 'contact-location', $post_id));
      break;
  }
}

siehe auch: https://developer.wordpress.org/reference/hooks/manage_posts_custom_column/

Spalte der Listenansicht des Custom Post Type sortierbar machen

Beispielcode um Custom Column(s) sortierbar zu machen

add_filter( 'manage_edit-mycpt_sortable_columns', 'set_custom_mycpt_sortable_columns' );

function set_custom_mycpt_sortable_columns( $columns ) {
  $columns['custom_taxonomy'] = 'custom_taxonomy';
  $columns['acf_field'] = 'acf_field';

  return $columns;
}

https://www.ractoon.com/wordpress-sortable-admin-columns-for-custom-posts/

Spalte der Listenansicht des Custom Post Type alphabetisch sortieren

// Order custom columns in WordPress Backend CPT Listing alphabetically
add_filter( 'manage_edit-reference_sortable_columns', 'reference_sortable_columns' );
function reference_sortable_columns( $columns ) {
    $columns['reference_customer_firma'] = 'reference_customer_firma';

    return $columns;
}

add_action( 'pre_get_posts', 'reference_firma_orderby' );
function reference_firma_orderby( $query ) {
    if( ! is_admin() )
        return;

    $orderby = $query->get( 'orderby');

    if( 'reference_customer_firma' == $orderby ) {
        $query->set('meta_key','reference_customer_firma');
        $query->set('orderby','meta_value');
        // "meta_value_num" is used for numeric sorting
        // "meta_value"     is used for Alphabetically sort.
    }
}

https://gist.github.com/vishalkakadiya/8c997a5e8789147e012b12cc4af90389

Spalte der Listenansicht des Custom Post Type filterbar machen

• https://wordpress.stackexchange.com/questions/45436/add-filter-menu-to-admin-list-of-posts-of-custom-type-to-filter-posts-by-custo
  • getestet und funktioniert mit definierten Werten (Label-Value-Paar)
  • Übergabe aller ACF-Feldwerte eines Feldes (z.B.: 'kontakt-typ') als dynamisches Label-Value-Paar als Array bisher nicht geklappt
• https://wordpress.stackexchange.com/questions/212519/filter-by-custom-field-in-custom-post-type-on-admin-page
  • getestet und Filter wird angezeigt, aber er filtert nicht bei Auswahl
  • hier werden die Werte zum filtern dynamisch/automatisch in das Dropdown geparsed