Reply To: Show only categories in the relationship field taxonomy filter

• alicinaroglu

• June 24, 2021 at 10:12 pm

Thank you mate. It works. If somebody has “Fatal error: [] operator not supported for strings” just add $field[‘taxonomy’] = []; in top of the function like this;

add_filter('acf/load_field/key=field_60c224887921d', 'load_just_categories_filter', 12, 1);
function load_just_categories_filter( $field ) {
    $field['taxonomy'] = [];
    $terms = get_terms( array(
        'taxonomy' => 'category',
        'hide_empty' => false,
		//'hierarchical' => 1,
		'parent' => 0
    ) );
    if ( !empty($terms) ) {
        foreach( $terms as $term ) {
			
			
            $field['taxonomy'][] = 'category:'.$term->slug;
			
        }
    }

    return $field;
}