我试图通过产品具有“关系”的国家/地区过滤循环。至。我已经根据自定义字段编写了一个查询，但它返回空，但我知道有与该国家/地区相关的产品。
我的代码如下，有什么想法吗？
<?php
if (!is_category()) {
echo '<p>Showing results for:<br />';
echo 'Number of results: '.$wp_query->found_posts;
echo 'Page '. ( get_query_var('paged') ? get_query_var('paged') : 1 ) . ' of ' . $wp_query->max_num_pages . '</p>';
}
$the_query = new WP_Query( $args );
$args = array(
'meta_key' => get_field('group-tour-country'),
'meta_value' => 'china'
);
if ($the_query->have_posts()): while ($the_query->have_posts()) : $the_query->the_post();
if (in_category(18)){ // is a group tour
if (isset($countryNames)) { unset ($countryNames); }
if (isset($countryLinks)) { unset ($countryLinks); }
$countryIDS = get_field('group-tour-country');
if( $countryIDS ):
foreach( $countryIDS as $p): // variable must be called $p (IMPORTANT)
setup_postdata($p);
$countryNames[] = get_the_title( $p->ID );
$countryLinks[] = get_the_permalink( $p->ID );
endforeach;
endif;
?>
<article style="float:left;margin: 10px 0 10px 0;">
<h2 style="background: none; line-height: normal;">
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<?php the_title(); ?>
<?php if (strlen(get_the_title()) > 30) {
echo '<br />';
} ?>
<span style="font-size: 14px; color: #666;"><?php the_field('group-tour-duration'); ?>
days from $<?php echo $leadIn = (get_field('group-tour-lead-in-price') == 0 ? "N/A" : number_format(get_field('group-tour-lead-in-price'), 0, ".", ",")); ?></span>
</a>
<?php
$paceField = get_field_object('group-tour-pace');
$paceValue = get_field('group-tour-pace');
$paceLabel = $paceField['choices'][$paceValue];
?>
<a href="<?php bloginfo('url'); ?>/more-details?field=<?php the_field('group-tour-pace'); ?>" style="float:right; margin:0 2px;" class="info-overlay help" title="<?php echo $paceLabel . ' tour - click icon for more details.'; ?> ">
<img src="<?php bloginfo('template_url'); ?>/images/icons/paced-<?php echo $paceValue; ?>-icon.png" alt="<?php echo $paceLabel; ?> icon" class="tour-pace"/>
</a>
<?php
if ( get_field('group-tour-altitude') ) {
?>
<a href="<?php bloginfo('url'); ?>/more-details?field=high-altitude" class="info-overlay help" style="float:right; margin:0 2px;" title="Tour at high altitude - click icon for more details.">
<img src="<?php bloginfo('template_url'); ?>/images/icons/paced-altitude-icon.png" alt="High Altitude" class="tour-pace" />
</a>
<?php } ?>
<?php
if (in_category(44)) {
?>
<a href="<?php bloginfo('url'); ?>/more-details?field=rhs" class="info-overlay help" style="float:right; margin:0 2px;" title="RHS Garden Tour - click icon for more details.">
<i class="fa fa-leaf" style="color:#ae241b;"></i>
</a>
<?php } ?>
</h2>
<div style="width:150px; padding-right:5px; float: left; text-align: center">
<?php
if ( has_post_thumbnail() ) {
$thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'mapmedium' );
$alt = get_post_meta(get_post_thumbnail_id($post->ID), '_wp_attachment_image_alt', true);
$url = $thumb['0'];
echo '<a title="View '.get_the_title().' " href="' .get_the_permalink(). '"><img
width="150"
alt="'. $alt .'"
src="'. $url .'" /></a>';
}
else {
$tourImages = get_field('group-tour-gallery');
if ($tourImages) {
?>
<a title="<?php echo $tourImages[0]['alt']; ?>" href="<?php the_permalink(); ?>"><img
width='150'
alt='<?php echo $image['alt']; ?>'
src='<?php echo $tourImages[0]['sizes']['mapmedium']; ?>'/></a>
<?php
}
}
$mapImage = get_field('group-tour-map');
if( !empty($mapImage) ):
$imgLarge = $mapImage['sizes'][ 'maplarge' ];
?>
<a href="<?php echo $imgLarge; ?>" class="map-overlay" title="<?php the_title(); ?> group tour map" style="display:block; padding: 10px 0"><i class="fa fa-map-marker" style="color:#ae241b;"></i> View map</a>
<?php endif; ?>
</div>
<div style="width:373px; float: left;">
<p>
<?php
$shortDesc = substr(get_field('group-tour-description'), 0, stripos(get_field('group-tour-description'), "."));
echo $shortDesc . '...';
?>
</p>
<p>
<strong>Countries Visited:</strong>
<?php
$i = 0;
foreach ($countryNames as $country) {
if ($i == count($countryNames) - 1) {
echo '<a href="' . $countryLinks[$i] . '" title="' . $country . ' group tours" >' . $country . '</a>';
} else {
echo '<a href="' . $countryLinks[$i] . '" title="' . $country . ' group tours" >' . $country . '</a>, ';
}
$i++;
}
?>
</p>
<p style="text-align: right;">
<a href="<?php the_permalink(); ?>" class="book-online">More details »</a>
<a href="<?php the_permalink(); ?>#price-guide" class="book-online">Dates & Prices »</a>
</p>
</div>
</article>
<?php
}
?>
<?php endwhile; ?>
<?php else: ?>
<!-- article -->
<article>
<h2><?php _e( 'Sorry, nothing to display.', 'WWT' ); ?></h2>
</article>
<!-- /article -->
<?php endif; ?>