在我设置的自定义分类法中，我很难按术语获取帖子。问题是这是一个多站点，我从网络上注册分类法的另一个博客中获得了这些数据。我的代码在注册分类法的博客上运行良好。然而，当我在另一个博客上使用switch\\u to\\u blog尝试相同的代码时，我得到了bool（false）。我想这意味着sql中有一个错误。然而，如果我只做is\\U术语，我可以确认它在那里。这里有一个链接，指向naitive博客上的代码，但另一个没有，

<?php get_header(); ?>

<?php global $switched; switch_to_blog(2); ?>

<div class="row-fluid mostwanted-container">

<?php
    $type = \'portal_warrants\';
    $paged = (get_query_var(\'paged\')) ? get_query_var(\'paged\') : 1;
    $terms = is_term( \'most-wanted\' , \'warrant_status\' );
    $args=array(
            \'post_type\' => $type,
            \'posts_per_page\' => 6,
            \'paged\' => $paged,
            \'tax_query\' =>
                    array(
                            array(
                                    \'taxonomy\' => \'warrant_status\',
                                    \'field\' => \'id\',
                                    \'terms\' => \'most-wanted\',
                            )
                    )

            );                                       

    $my_query = null;
    $my_query = new WP_Query($args);
    $i = 0;
    if( $my_query->have_posts() ) {
            while ($my_query->have_posts()) : $my_query->the_post();

            if( $i % 3 == 0) :?>
                    </div>
                    <div class="row-fluid mostwanted-container">
            <?php endif; ?>
            <?php print_r(var_dump($wp_query->request)); ?>                
            <div class="span4 wanted">
                    <h1>Wanted</h1>
                    <div class="mostwanted-img">
                            <img src="http://placehold.it/150x170">
                            <span class="arrested">Arrested</span>
                    </div>
                    <div class="mostwanted-info">
                            <h3><?php the_title(); ?></h3>
                            <ul>
                                    <li><strong>Last Known Address:</strong></li>
                                    <li><strong>Hair:</strong></li>
                                    <li><strong>Eyes:</strong></li>
                                    <li><strong>Height:</strong></li>
                                    <li><strong>Weight:</strong></li>
                            </ul>
                    </div>
            </div> 

    <?php $i++ ?>  

<?php endwhile; } wp_reset_query(); ?> 

</div> 

<?php restore_current_blog(); ?>

<?php get_footer(); ?>

*编辑（更新了pastebin，包括switch\\u to\\u blog）

http://pastebin.com/uBbaXnSt

而且，这根本不会输出任何东西即使print_r(var_dump($my_query->request));

溶液（或至少部分）

问题是switch_to_blog 不允许您访问网络上其他博客中的所有内容，包括分类法、标记和功能中的内容。php，尽管不要完全引用我的话。因此，分类法没有在“切换到”博客中注册。我的解决方案（至少目前）在该博客中注册分类法。这样做之后，tax_query 按预期工作。这就是我要做的，直到我找到一个更好的解决方案（如果存在的话）。

function taxonomy_exists( $taxonomy ) {
        global $wp_taxonomies;

        return isset( $wp_taxonomies[$taxonomy] );
}

// Add this before the loop
// The if is to don\'t touch the taxonomy if is a real taxonomy
// The "delete" value is to know this is not a real taxonomy
global $wp_taxonomies;
if(!taxonomy_exists(\'warrant_status\'))
    $wp_taxonomies[\'warrant_status\'] = \'delete\';

// The normal loop
$args=array(
        \'post_type\' => $type,
        \'posts_per_page\' => 6,
        \'paged\' => $paged,
        \'tax_query\' =>
                array(
                        array(
                                \'taxonomy\' => \'warrant_status\',
                                \'field\' => \'id\',
                                \'terms\' => \'most-wanted\',
                        )
                )

        );                                       

$my_query = null;
$my_query = new WP_Query($args);

// After finish the loop, remove the hack
// do the if to don\'t delete a real taxonomy
if ($wp_taxonomies[\'warrant_status\'] == \'delete\')
    unset($wp_taxonomies[\'warrant_status\'])

$args = array(
            \'post_type\' => $type,
            \'posts_per_page\' => 6,
            \'paged\' => $paged,
            \'tax_query\' =>
                    array(
                            array(
                                    \'taxonomy\' => \'warrant_status\',
                                    \'field\' => \'slug\',
                                    \'terms\' => \'most-wanted\',
                            )
                    )

            );

$queryterms = "
    SELECT *
    FROM wp_".$site->blog_id."_terms terms, wp_".$site->blog_id."_term_taxonomy term_taxonomy, wp_".$site->blog_id."_term_relationships term_relationships 
    WHERE (terms.term_id = term_taxonomy.term_id AND term_taxonomy.term_taxonomy_id = term_relationships.term_taxonomy_id)
    AND term_relationships.object_id = ".$post->ID."
    ";
$terms = $wpdb->get_results($queryterms, OBJECT);
foreach ($terms as $term) {
    // Your stuff
};