自定义字段上的自定义发布类型导航

我正在处理按自定义字段排序的自定义帖子类型。当我列出帖子时没有问题。但是，当我转到其中一篇文章的单篇文章页面时，我希望上一篇和下一篇导航链接按照自定义字段指定的排序顺序将我们带到上一篇/下一篇文章。默认情况下，WP按发布日期对其进行排序。

排序列表代码：

    // shortcodes
    // lor_list of letters: Lists all letters of reference in a table format
    add_shortcode(\'lor_list\', \'aaaConsultant_shortcode_lor_list\');

    function aaaConsultant_shortcode_lor_list() {
        global $wp_query;

        $oWP = new wp_query(array(
            \'post_type\' => \'letters_of_ref\'
            , \'orderby\' => \'meta_value\'
            , \'meta_key\' => \'aaaConsultant_dateofletter\'
        ));

        $out = \'<div id="lor_list_container">\' . "\\n";
        if (!$oWP->found_posts) {
            $out .= \'<p>d\\\'Oh! We don\\\'t have any Letters of Reference yet.</p>\' . "\\n";
        } else {
            while ($oWP->have_posts()) {
                $oWP->the_post();
                $out .= \'<a href="\' . get_permalink() . \'">\' . get_the_title( $oWP->post->ID ) . \'</a>\' . "<br>\\n";
            }
        }
        $out .= \'</div> <!-- END #lor_list_container -->\' . "\\n";

        wp_reset_postdata();
        return $out;
    }

我该怎么做？

谢谢你的帮助。

add_filter(\'get_previous_post_join\', \'wpse96670_get_previous_post_join_custom_sort\'); add_filter(\'get_previous_post_where\', \'wpse96670_get_previous_post_where_custom_sort\'); add_filter(\'get_previous_post_sort\', \'wpse96670_get_previous_post_sort_custom_sort\'); function wpse96670_get_previous_post_join_custom_sort($join) { global $wpdb; return "INNER JOIN {$wpdb->prefix}postmeta ON (p.ID = {$wpdb->prefix}postmeta.post_id)"; } function wpse96670_get_previous_post_where_custom_sort($where) { global $wpdb, $post; $meta_value = get_post_meta($post->ID, \'aaaConsultant_dateofletter\', true); return "WHERE 1=1 AND p.post_type = \'letters_of_ref\' AND p.post_status = \'publish\' AND {$wpdb->prefix}postmeta.meta_key = \'aaaConsultant_dateofletter\' AND {$wpdb->prefix}postmeta.meta_value < \'{$meta_value}\'"; } function wpse96670_get_previous_post_sort_custom_sort($sort) { global $wpdb; return "ORDER BY {$wpdb->prefix}postmeta.meta_value DESC LIMIT 1"; }

add_filter(\'get_next_post_join\', \'wpse96670_get_next_post_join_custom_sort\'); add_filter(\'get_next_post_where\', \'wpse96670_get_next_post_where_custom_sort\'); add_filter(\'get_next_post_sort\', \'wpse96670_get_next_post_sort_custom_sort\'); function wpse96670_get_next_post_join_custom_sort($join) { global $wpdb; return "INNER JOIN {$wpdb->prefix}postmeta ON (p.ID = {$wpdb->prefix}postmeta.post_id)"; } function wpse96670_get_next_post_where_custom_sort($where) { global $wpdb, $post; $meta_value = get_post_meta($post->ID, \'aaaConsultant_dateofletter\', true); return "WHERE 1=1 AND p.post_type = \'letters_of_ref\' AND p.post_status = \'publish\' AND {$wpdb->prefix}postmeta.meta_key = \'aaaConsultant_dateofletter\' AND {$wpdb->prefix}postmeta.meta_value > \'{$meta_value}\'"; } function wpse96670_get_next_post_sort_custom_sort($sort) { global $wpdb; return "ORDER BY {$wpdb->prefix}postmeta.meta_value ASC LIMIT 1"; }

<?php $oNext = get_adjacent_post(false, \'\', true); $oPrev = get_adjacent_post(false, \'\', false); if ($oPrev || $oNext) { echo \'<div id="lor_nav">\' . "\\n"; } if ($oPrev) { echo \'<div class="prevlink"><a href="\' . get_permalink($oPrev->ID) . \'"> « \' . $oPrev->post_title . \'</a></div>\' . "\\n"; } if ($oNext) { echo \'<div class="nextlink"><a href="\' . get_permalink($oNext->ID) . \'">\' . $oNext->post_title . \' »</a></div>\' . "\\n"; } if ($oPrev || $oNext) { echo \'</div><div class="clear"></div>\' . "\\n"; } ?>

小码农CODE

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