按自定义分类查询自定义帖子类型中的相关帖子

我试图通过自定义分类法显示相关帖子，并且只有使用类别的相关帖子的解决方案。

    $orig_post = $post;
    global $post;
    $categories = get_the_category($post->ID);
    if ($categories) {
    $category_ids = array();
    foreach($categories as $individual_category) $category_ids[] = $individual_category->term_id;

    $args=array(
    \'category__in\' => $category_ids,
    \'post__not_in\' => array($post->ID),
    \'posts_per_page\'=> 4, // Number of related posts that will be shown.
    \'caller_get_posts\'=>1
    ); 

    $my_query = new wp_query($args);  
    if( $my_query->have_posts() ) {  
    echo \'<div id="relatedposts" class="clearfix"><h4>Related Posts</h4><ul>\';  
    while ($my_query->have_posts()) {  
    $my_query->the_post();  
    ?>  

    <?php  
    if ( has_post_thumbnail() ) { ?>  
    <li><div class="relatedthumb"><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title_attribute(); ?>">
    <?php echo the_post_thumbnail(); ?></a>
    <a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><div class="title"><?php the_title(); ?></div></a>
    </div>
    </li> 
    <?php }  
    ?>  

<?
}
echo \'</ul></div>\';
}
}
$post = $orig_post;
wp_reset_query();

以下代码仅适用于具有已注册类别的帖子类型，而不适用于自定义分类法类型。

//Get array of terms $terms = get_the_terms( $post->ID , \'product_tags\', \'string\'); //Pluck out the IDs to get an array of IDS $term_ids = wp_list_pluck($terms,\'term_id\'); //Query posts with tax_query. Choose in \'IN\' if want to query posts with any of the terms //Chose \'AND\' if you want to query for posts with all terms $second_query = new WP_Query( array( \'post_type\' => \'products\', \'tax_query\' => array( array( \'taxonomy\' => \'product_tags\', \'field\' => \'id\', \'terms\' => $term_ids, \'operator\'=> \'IN\' //Or \'AND\' or \'NOT IN\' )), \'posts_per_page\' => 3, \'ignore_sticky_posts\' => 1, \'orderby\' => \'rand\', \'post__not_in\'=>array($post->ID) ) ); //Loop through posts and display... if($second_query->have_posts()) { while ($second_query->have_posts() ) : $second_query->the_post(); ?> <div class="single_related"> <?php if (has_post_thumbnail()) { ?> <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"> <?php the_post_thumbnail( \'related_sm\', array(\'alt\' => get_the_title()) ); ?> </a> <?php } else { ?> <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a> <?php } ?> </div> <?php endwhile; wp_reset_query(); }

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