Hide children posts in admin index for hierarchical WordPress posts

gistfile1.txt

	add_action( 'pre_get_posts', array( $this, 'hide_children_posts' ) );

	function hide_children_posts( $query ) {
		if ( !is_post_type_archive( 'hotspot' ) || !is_admin() ) return;

		$query->set( 'post_parent', 0 );
	}