Jednoduchý způsob přímo v šabloně:
/—code php
previous_post_link( ‚%link‘, ‚Prev post in category‘, true );
next_post_link( ‚%link‘, ‚Next post in category‘, true );
\—
V případě, že nechceme zasahovat do šablony (potřebujeme např. upravit listování v rubrice v single.php v Twentyfifteen), stačí vložit do functions.php tento kód:
/—code php
add_filter( ‚get_next_post_join‘, ‚navigate_in_same_taxonomy_join‘, 20);
add_filter( ‚get_previous_post_join‘, ‚navigate_in_same_taxonomy_join‘, 20 );
function navigate_in_same_taxonomy_join() {
global $wpdb;
return “ INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id“;
}
add_filter( ‚get_next_post_where‘ , ‚navigate_in_same_taxonomy_where‘ );
add_filter( ‚get_previous_post_where‘ , ‚navigate_in_same_taxonomy_where‘ );
function navigate_in_same_taxonomy_where( $original ) {
global $wpdb, $post;
$where = “;
$taxonomy = ‚category‘;
$op = (‚get_previous_post_where‘ == current_filter()) ? ‚<' : '>‚;
$where = $wpdb->prepare( „AND tt.taxonomy = %s“, $taxonomy );
if ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) )
return $original ;
$term_array = wp_get_object_terms( $post->ID, $taxonomy, array( ‚fields‘ => ‚ids‘ ) );
$term_array = array_map( ‚intval‘, $term_array );
if ( ! $term_array || is_wp_error( $term_array ) )
return $original ;
$where = “ AND tt.term_id IN (“ . implode( ‚,‘, $term_array ) . „)“;
return $wpdb->prepare( „WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = ‚publish‘ $where“, $post->post_date, $post->post_type );
}
\—
„Zdroj »“:http://presscustomizr.com/snippet/restrict-post-navigation-category/
