Не работает get_post_meta

<?php
	$curr_page_id = $wp_query->get_queried_object_id();
	$images = get_children( array (
		'post_parent' => $curr_page_id,
		'post_type' => 'attachment',
		'post_mime_type' => 'image'
	));

	if ( empty($images) ) {
		// no attachments here
	} else {
		foreach ( $images as $attachment_id => $attachment ) {
			echo wp_get_attachment_image( $attachment_id, 'thumbnail' );
		}
	}
?>