is_home() && $query->is_main_query() ) { $query->set( 'cat', '2'); if ( !empty( $_GET['person'] ) ) { $query->set( 'meta_query', array( array( 'key' => 'mitreisende', 'value' => $_GET['person'], 'compare' => 'LIKE' ) ) ); } } } add_action( 'pre_get_posts', 'my_home_category' ); // Related posts function function atravelblog_related_posts() { global $post; $thisID = get_the_ID(); $cat = get_the_category()[0]->name; if ( $cat == 'Urlaub' ){ $tagebuch = new WP_Query( array( 'category_name' => 'Tagebuch', 'posts_per_page' => -1, 'order' => 'ASC', 'meta_query' => array( array( 'key' => 'urlaub', // name of custom field 'value' => '"'.get_the_ID().'"', // matches exaclty "123", not just 123. This prevents a match for "1234" 'compare' => 'LIKE' ) ) ) ); if ($tagebuch->have_posts()) : echo('

Tagebuch Einträge:

'); echo('
'); while ( $tagebuch->have_posts() ) : $tagebuch->the_post(); global $post; get_template_part( 'content', get_post_format() ); endwhile; echo('
'); echo('
'); endif; wp_reset_query(); $album = new WP_Query( array( 'category_name' => 'Album', 'posts_per_page' => -1, 'order' => 'ASC', 'meta_query' => array( array( 'key' => 'urlaub', // name of custom field 'value' => '"'.get_the_ID().'"', // matches exaclty "123", not just 123. This prevents a match for "1234" 'compare' => 'LIKE' ) ) ) ); if ($album->have_posts()) : echo('

Fotoalben:

'); echo('
'); while ( $album->have_posts() ) : $album->the_post(); global $post; get_template_part( 'content', get_post_format() ); endwhile; echo('
'); echo('
'); endif; wp_reset_query(); $touren = new WP_Query( array( 'category_name' => 'Tour', 'posts_per_page' => -1, 'order' => 'ASC', 'meta_query' => array( array( 'key' => 'urlaub', // name of custom field 'value' => '"'.get_the_ID().'"', // matches exaclty "123", not just 123. This prevents a match for "1234" 'compare' => 'LIKE' ) ) ) ); if ($touren->have_posts()) : echo('

Touren:

'); echo('
'); while ( $touren->have_posts() ) : $touren->the_post(); global $post; get_template_part( 'content', get_post_format() ); endwhile; echo('
'); echo('
'); endif; wp_reset_query(); } elseif($cat == 'Tour' || $cat == 'Album' || $cat == 'Tagebuch') { $urlaub = new WP_Query(array('p' => get_field('urlaub')[0])); if ($urlaub->have_posts()) : echo('

Urlaub:

'); echo('
'); while ( $urlaub->have_posts() ) : $urlaub->the_post(); global $post; get_template_part( 'content', get_post_format() ); endwhile; echo('
'); echo('
'); endif; wp_reset_query(); } }