我需要按三个字段获取有序列表。
$sql = "
SELECT
SQL_CALC_FOUND_ROWS $wpdb->posts.ID
FROM
$wpdb->posts
INNER JOIN
$wpdb->postmeta ON ( $wpdb->posts.ID = $wpdb->postmeta.post_id )
INNER JOIN
$wpdb->postmeta AS mt1 ON ( $wpdb->posts.ID = mt1.post_id )
WHERE
1=1
AND
(
( mt1.meta_key = 'pub_series' AND mt1.meta_value = 'Book' )
OR ( mt1.meta_key = 'pub_series' AND mt1.meta_value = 'Book chapter' )
OR ( mt1.meta_key = 'pub_series' AND mt1.meta_value = 'Journal Article' )
)
/*AND
(
mt3.meta_key = 'forthcoming'
)*/
AND
$wpdb->postmeta.meta_key = 'pub_year'
AND
$wpdb->posts.post_type = 'publication'
AND
$wpdb->posts.post_status = 'publish'
GROUP BY
$wpdb->posts.ID
ORDER BY
/*FIELD(mt3.meta_key, 'forthcoming') DESC,
FIELD(mt3.meta_value, 'null') DESC,*/
//FIELD($wpdb->postmeta.meta_value,1),
$wpdb->postmeta.meta_value DESC,
$wpdb->posts.post_date DESC
";
$total = count($wpdb->get_results($sql));
$offset = ( $paged * $posts_per_page ) - $posts_per_page;
$results = $wpdb->get_results( $sql . "
LIMIT
$offset, $posts_per_page" );
这是由两个字段组成的查询排序列表:[custom_field] pub_year(可能值 2018、2017...)和 [delautl wp post date field] post_date。没关系。
但现在我需要显示 [custom_field] 即将到来 = 1 的项目。问题是,如果此字段存在三种状态: - 即将推出的项目 = 1 - 即将推出的项目 = 0 - 以及即将出现的自定义字段不存在的项目
我需要获取第一个即将推出的项目 = 1 的有序列表,其他项目应按 pub_year 和日期排序。我怎样才能做到这一点。如果您需要更多信息,请告诉我。非常感谢。
我需要有序列表,并使用更新元方法为所有帖子添加即将到来的元键= 0。所以所有领域都有这个领域。
接下来我使用了wp_query meta_query args:
$pub_series = 'Book,Book chapter,Journal Article';
$search_args = array();
if (!empty($pub_series)) {
$pub_series_arr = explode(",", $pub_series);
if (!empty($pub_series_arr)) {
$search_args_add = array(
'relation' => 'OR'
);
foreach ($pub_series_arr as $pub_series_el) {
$adv_search_query_el = trim($pub_series_el);
if (!empty($adv_search_query_el)) {
$search_args_add[] = array(
'key' => 'pub_series',
'value' => $adv_search_query_el,
'compare' => '='
);
}
}
$search_args['meta_query'][] = $search_args_add;
}
}
$search_args['meta_query'][] = array(
'relation' => 'OR',
'forthcoming_clause' => array(
'key' => 'forthcoming',
'value' => '1'
),
'forthcoming_clause0' => array(
'key' => 'forthcoming',
'value' => '0'
)
);
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
'post_type' => 'publication',
'post_status' => 'publish',
'posts_per_page' => 10,
'orderby' => array(
'forthcoming_clause' => 'DESC',
'meta_value' => 'DESC',
'date' => 'DESC'
),
'meta_key' => 'pub_year',
'paged' => $paged
);
$args = array_merge($args, $search_args);
$posts = new WP_Query( $args );
if ( $posts->have_posts() ) : ...