类别的所有自定义字段的总和 [英] Sum of all custom fields for category

问题描述

我在名为 number 的帖子上有一个自定义字段.

I've got a custom field on posts called number.

在category.php的前端，我需要总计当前类别中所有具有 number 的帖子的值.

On the front-end in category.php, I need to total up the value of all posts in the current category that have number.

例如，如果当前类别有3个帖子，并且每个帖子中的 number 值分别为 1 ， 5 和 10 ，然后在前端需要显示总计 16 .

So for example, if the current category had 3 posts, and in each post the number values were 1, 5 and 10 respectively, then on the front-end it needs to display the total 16.

我不确定从哪里开始.

我目前的循环:

<?php if ( have_posts() ) : ?>

        <h1><?php printf( __( 'Category Archives: %s', 'twentythirteen' ), single_cat_title( '', false ) ); ?></h1>
        <p></p>

    <?php /* The loop */ ?>
    <?php while ( have_posts() ) : the_post(); ?>
        <?php get_template_part( 'content', get_post_format() ); ?>
    <?php endwhile; ?>

<?php else : ?>
    <?php // ?>
<?php endif; ?>

感谢您的帮助.

推荐答案

所要实现的简短版本(这也会减少对数据库的调用)将类似于以下内容:

A shorter version of what you're trying to achieve (which also reduces calls to the database) would look something like the following:

<p>
    <?php
        $total = 0;
        foreach( $wp_query->posts as $number ) {
            $total += get_post_meta( $number->ID, 'numbers', true );
        }
        echo $total;
    ?>
</p>

正如另一条评论中所述，您不需要其他循环，因为您的帖子已经存在于 $ wp_query 中.

As mentioned in another comment, you don't need another loop, as your posts already exist in $wp_query.

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