我在获取此代码中的author\\u id时遇到问题。不要什么都不显示。有人能帮我吗？

<?php global $query_string;

query_posts( $query_string . \'&orderby=rand\' ); ?>

<?php while(have_posts()): the_post();
$author_id = the_author_meta(\'ID\');
echo \'Autor:\'.$author_id;
$ofertas = array();

// Second Loop
$i = 0;
$args = array(
    \'author\' => $author_id,
    \'post_type\' => \'ofertas\'
);
$the_query = new WP_Query( $args );
if ($the_query->have_posts()) : 
    while ($the_query->have_posts()) : $the_query->the_post(); // check if it has offers, if it has, loop over the offers
        $ofertas[$i][\'title\'] = get_the_title(); // or anything you need
        $i++;
    endwhile; // close the loop
else: // if it has no post
    continue; // we don\'t display the post
endif;

wp_reset_postdata(); 
?>

    <div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>