WooCommerce相关产品按2个分类

我需要按分类法更改相关产品，如果分类法没有足够的产品，则显示其他分类法的其余部分。

我有2个分类学；product_tag 和product_cat. 有时产品product_tag 不超过4个，所以我需要使用另一个分类法来实现相关产品中的4个产品。

所以我需要4个相关产品，如果product\\u标签上都有，那么什么都没有，如果没有，请使用product\\u cat来完成4个产品。

任何帮助都将是巨大的。

<?php
    // get the custom post type\'s taxonomy terms
    $related_category = wp_get_object_terms( $post->ID, \'product_cat\', array(\'fields\' => \'ids\') );
    $related_tag = wp_get_object_terms( $post->ID, \'product_tag\', array(\'fields\' => \'ids\') );
    // arguments
    $args = array(
    \'post_type\' => \'product\',
    \'post_status\' => \'publish\',
    \'posts_per_page\' => 4, // you may edit this number
    \'orderby\' => \'rand\',
    \'tax_query\' => array(
        array(
            \'taxonomy\' => \'product_tag\',
            \'field\' => \'id\',
            \'terms\' => $related_tag
        )
    ),
    \'post__not_in\' => array ($post->ID),
    );
    $related_items = new WP_Query( $args );
    // loop over query
    if ($related_items->have_posts()) :
    while ( $related_items->have_posts() ) : $related_items->the_post();
    ?>
    <div class="related_item">
      <div class="Related_image">
        <a href="<?php the_permalink() ?>"><?php the_post_thumbnail(\'thumbnail\'); ?></a>
      </div>
        <div class="Related_title">
          <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a><h2>

        </div>
      </div>
    <?php
    endwhile;
    endif;
    // Reset Post Data
    wp_reset_postdata();
    ?>

<?php // get the custom post type\'s taxonomy terms $related_tag = wp_get_object_terms( $post->ID, \'product_tag\', array(\'fields\' => \'ids\')); $related_cat = wp_get_object_terms( $post->ID, \'product_cat\', array(\'fields\' => \'ids\')); // arguments 1 $args1 = array( \'post_type\' => \'product\', \'post_status\' => \'publish\', \'posts_per_page\' => 5, \'orderby\' => \'\', \'tax_query\' => array( array( \'taxonomy\' => \'product_tag\', \'field\' => \'id\', \'terms\' => $related_tag, ), ), \'post__not_in\' => array ($post->ID), ); // arguments 2 $args2 = array( \'post_type\' => \'product\', \'post_status\' => \'publish\', \'posts_per_page\' => 5, \'orderby\' => \'rand\', \'tax_query\' => array( array( \'taxonomy\' => \'product_cat\', \'field\' => \'id\', \'terms\' => $related_cat, ), ), \'post__not_in\' => array ($post->ID), ); $related_items1 = new WP_Query( $args1 ); $related_items2 = new WP_Query( $args2 ); $related_items = new WP_Query(); $related_items->posts = array_merge( $related_items1->posts, $related_items2->posts ); $related_items3->post_count=5 - $related_items1->post_count; $related_items->post_count = $related_items1->post_count + $related_items3->post_count; // loop over query if ($related_items->have_posts()) : while ( $related_items->have_posts() ) : $related_items->the_post(); ?> <div class="related_item"> <div class="Related_image"> <a href="<?php the_permalink() ?>"><?php the_post_thumbnail(\'thumbnail\'); ?></a> </div> <div class="Related_title"> <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a><h2> </div> </div> <?php endwhile; endif; // Reset Post Data wp_reset_postdata(); ?>

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