woo-commerce产品的评级不会与woocommerce自定义主题一起显示

Question

我正在制作产品评分，我只想添加评分而不是评论。 这是我的代码。 内容单product.php

<div class="description">

    <?php
        /**
         * woocommerce_single_product_summary hook
         *
         * @hooked woocommerce_template_single_title - 5
         * @hooked woocommerce_template_single_rating - 10
         * @hooked woocommerce_template_single_price - 10
         * @hooked woocommerce_template_single_excerpt - 20
         * @hooked woocommerce_template_single_add_to_cart - 30
         * @hooked woocommerce_template_single_meta - 40
         * @hooked woocommerce_template_single_sharing - 50
         */
        do_action( 'woocommerce_single_product_summary' );


    ?>

</div>

的functions.php

add_action('woocommerce_after_single_product_summary', 'my_print_stars' );


function my_print_stars(){
    global $wpdb;
    global $post;
    $count = $wpdb->get_var("
    SELECT COUNT(meta_value) FROM $wpdb->commentmeta
    LEFT JOIN $wpdb->comments ON $wpdb->commentmeta.comment_id = $wpdb->comments.comment_ID
    WHERE meta_key = 'rating'
    AND comment_post_ID = $post->ID
    AND comment_approved = '1'
    AND meta_value > 0
");

$rating = $wpdb->get_var("
    SELECT SUM(meta_value) FROM $wpdb->commentmeta
    LEFT JOIN $wpdb->comments ON $wpdb->commentmeta.comment_id = $wpdb->comments.comment_ID
    WHERE meta_key = 'rating'
    AND comment_post_ID = $post->ID
    AND comment_approved = '1'
");

if ( $count > 0 ) {

    $average = number_format($rating / $count, 2);

    echo '<div class="starwrapper" itemprop="aggregateRating" itemscope itemtype="http://schema.org/AggregateRating">';

    echo '<span class="star-rating" title="'.sprintf(__('Rated %s out of 5', 'woocommerce'), $average).'"><span style="width:'.($average*16).'px"><span itemprop="ratingValue" class="rating">'.$average.'</span> </span></span>';

    echo '</div>';
    }

}

主题/新/ INC / woocommerce / hooks.php remove_action（

remove_action( 'woocommerce_after_single_product_summary','woocommerce_template_single_rating',10 );
add_action( 'woocommerce_after_single_product_summary','woocommerce_template_single_rating',10 );

这是代码。问题是评级部分未显示在产品详细信息页面中。这段代码有什么问题吗？或者我必须添加新的。