回答編集履歴
1
ぞー修正例
test
CHANGED
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@@ -11,3 +11,199 @@
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$query->set( 'startdate' , '' );
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```
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**追記**
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月別にするなら、以下のような修正で。
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ただし、カスタムフィールドの値は"2016年01月13日"のような形で、月はゼロ付きの二桁表記である必要があります。
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もう少し改良を加えれば、上記の制限を解消して、カテゴリ別などもできるかと思います。
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```PHP
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function my_get_year_archives( $args = '' ) {
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global $wpdb, $wp_locale;
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$defaults = array(
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'type' => 'monthly',
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'date_field' => 'startdate',
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'format' => 'option',
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'echo' => true,
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'limit' => '',
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'before' => '',
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'after' => '',
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'show_post_count' => true,
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);
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$r = wp_parse_args( $args, $defaults );
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extract( $r, EXTR_SKIP );
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if ( '' != $limit ) {
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$limit = absint( $limit );
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$limit = ' LIMIT '.$limit;
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}
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$field = 'm.meta_value';
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// 修正
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$select = "SELECT SUBSTRING($field,1,8) AS `yearmonth`, count(p.ID) AS posts";
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$where = "WHERE p.post_type = 'post' AND p.post_status = 'publish'";
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$where .= $wpdb->prepare( ' AND m.meta_key = %s', $date_field );
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$join = " INNER JOIN $wpdb->postmeta AS m ON m.post_id = p.ID";
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$where = apply_filters( 'getarchives_where', $where, $r );
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$join = apply_filters( 'getarchives_join' , $join , $r );
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$output = '';
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// 修正
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$query = "$select FROM $wpdb->posts AS p $join $where GROUP BY SUBSTRING($field,1,8) ORDER BY $field DESC $limit";
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$key = md5( $query );
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$cache = wp_cache_get( 'my_get_year_archives' , 'general' );
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if ( !isset( $cache[ $key ] ) ) {
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$arcresults = $wpdb->get_results( $query );
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$cache[ $key ] = $arcresults;
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wp_cache_set( 'my_get_year_archives', $cache, 'general' );
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} else {
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$arcresults = $cache[ $key ];
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}
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if ( $arcresults ) {
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$afterafter = $after;
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foreach ( (array) $arcresults as $arcresult ) {
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// 修正
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$arcresult->year = intval(mb_substr($arcresult->yearmonth, 0, 4));
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$arcresult->month = intval(mb_substr($arcresult->yearmonth, 5, 2));
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$url = add_query_arg( array( 'meta_key' => $date_field ), get_month_link( $arcresult->year, $arcresult->month ) );
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$text = sprintf( '%s', $arcresult->yearmonth );
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if ($show_post_count)
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$after = ' ('.$arcresult->posts.')' . $afterafter;
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$output .= get_archives_link( $url, $text, $format, $before, $after );
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}
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}
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if ( $echo )
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echo $output;
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else
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return $output;
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}
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add_action( 'init', 'my_init' );
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function my_init() {
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global $wp;
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$wp->add_query_var( 'meta_key' );
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}
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add_action( 'pre_get_posts', 'my_pre_get_posts' );
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function my_pre_get_posts( $query ) {
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if ( $query->is_month ) {
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$meta_query = array(
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array(
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'key' => $query->get( 'meta_key' ),
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// 修正
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'value' => $query->get( 'year' ).'年'.sprintf("%02d",$query->get( 'monthnum' )).'月',
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'compare' => 'LIKE'
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),
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);
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$query->set( 'meta_query' , $meta_query );
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$query->set( 'year' , '' );
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// 修正
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$query->set( 'monthnum' , '' );
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$query->set( 'startdate' , '' );
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$query->set( 'meta_key' , '' );
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}
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}
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```
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