WordPressのダッシュボードには投稿一覧というメニューがあります。
投稿一覧には検索欄があるのですが、この検索欄は本文やタイトルしか検索できません。
post IDで検索するカスタマイズは検索すると見つかります。
では、slugで検索する場合はどうかというと、出来なくもないけど同じやり方だとやや面倒な感じがしました。
管理画面でpost IDで記事を検索するカスタマイズ
検索するといくつか出てきます。
こちらのカスタマイズは、検索欄に数値だけ入力された場合はpost IDをキーとして検索してくれるというものです。
SQLを叩いてないので安心感がありますね。
/**
* Allows posts to be searched by ID in the admin area.
*
* @param WP_Query $query The WP_Query instance (passed by reference).
*/
add_action( 'pre_get_posts','wpse_admin_search_include_ids' );
function wpse_admin_search_include_ids( $query ) {
// Bail if we are not in the admin area
if ( ! is_admin() ) {
return;
}
// Bail if this is not the search query.
if ( ! $query->is_main_query() && ! $query->is_search() ) {
return;
}
// Get the value that is being searched.
$search_string = get_query_var( 's' );
// Bail if the search string is not an integer.
if ( ! filter_var( $search_string, FILTER_VALIDATE_INT ) ) {
return;
}
// Set WP Query's p value to the searched post ID.
$query->set( 'p', intval( $search_string ) );
// Reset the search value to prevent standard search from being used.
$query->set( 's', '' );
}‘ｓ’とか’p’とかなんなんですか？という場合はこちらのコードに説明があります。
‘s’は、サーチキーワードです。
‘p’は、post IDです。
もし、slugを対象にしたい場合は、’post_in’にすれば良さそうですね。
好きなようにクエリパラメータを設定して投げてあげれば、その結果が返ってきます。
でも、面倒なのはslugを検索したい時と通常の検索の区別をつけにくいことです。
/**
* Parse a query string and set query type booleans.
*
* @since 1.5.0
* @since 4.2.0 Introduced the ability to order by specific clauses of a `$meta_query`, by passing the clause's
* array key to `$orderby`.
* @since 4.4.0 Introduced `$post_name__in` and `$title` parameters. `$s` was updated to support excluded
* search terms, by prepending a hyphen.
* @since 4.5.0 Removed the `$comments_popup` parameter.
* Introduced the `$comment_status` and `$ping_status` parameters.
* Introduced `RAND(x)` syntax for `$orderby`, which allows an integer seed value to random sorts.
* @since 4.6.0 Added 'post_name__in' support for `$orderby`. Introduced the `$lazy_load_term_meta` argument.
* @since 4.9.0 Introduced the `$comment_count` parameter.
* @since 5.1.0 Introduced the `$meta_compare_key` parameter.
* @since 5.3.0 Introduced the `$meta_type_key` parameter.
* @since 6.1.0 Introduced the `$update_menu_item_cache` parameter.
*
* @param string|array $query {
* Optional. Array or string of Query parameters.
*
* @type int $attachment_id Attachment post ID. Used for 'attachment' post_type.
* @type int|string $author Author ID, or comma-separated list of IDs.
* @type string $author_name User 'user_nicename'.
* @type int[] $author__in An array of author IDs to query from.
* @type int[] $author__not_in An array of author IDs not to query from.
* @type bool $cache_results Whether to cache post information. Default true.
* @type int|string $cat Category ID or comma-separated list of IDs (this or any children).
* @type int[] $category__and An array of category IDs (AND in).
* @type int[] $category__in An array of category IDs (OR in, no children).
* @type int[] $category__not_in An array of category IDs (NOT in).
* @type string $category_name Use category slug (not name, this or any children).
* @type array|int $comment_count Filter results by comment count. Provide an integer to match
* comment count exactly. Provide an array with integer 'value'
* and 'compare' operator ('=', '!=', '>', '>=', '<', '<=' ) to
* compare against comment_count in a specific way.
* @type string $comment_status Comment status.
* @type int $comments_per_page The number of comments to return per page.
* Default 'comments_per_page' option.
* @type array $date_query An associative array of WP_Date_Query arguments.
* See WP_Date_Query::__construct().
* @type int $day Day of the month. Default empty. Accepts numbers 1-31.
* @type bool $exact Whether to search by exact keyword. Default false.
* @type string $fields Post fields to query for. Accepts:
* - '' Returns an array of complete post objects (`WP_Post[]`).
* - 'ids' Returns an array of post IDs (`int[]`).
* - 'id=>parent' Returns an associative array of parent post IDs,
* keyed by post ID (`int[]`).
* Default ''.
* @type int $hour Hour of the day. Default empty. Accepts numbers 0-23.
* @type int|bool $ignore_sticky_posts Whether to ignore sticky posts or not. Setting this to false
* excludes stickies from 'post__in'. Accepts 1|true, 0|false.
* Default false.
* @type int $m Combination YearMonth. Accepts any four-digit year and month
* numbers 01-12. Default empty.
* @type string|string[] $meta_key Meta key or keys to filter by.
* @type string|string[] $meta_value Meta value or values to filter by.
* @type string $meta_compare MySQL operator used for comparing the meta value.
* See WP_Meta_Query::__construct() for accepted values and default value.
* @type string $meta_compare_key MySQL operator used for comparing the meta key.
* See WP_Meta_Query::__construct() for accepted values and default value.
* @type string $meta_type MySQL data type that the meta_value column will be CAST to for comparisons.
* See WP_Meta_Query::__construct() for accepted values and default value.
* @type string $meta_type_key MySQL data type that the meta_key column will be CAST to for comparisons.
* See WP_Meta_Query::__construct() for accepted values and default value.
* @type array $meta_query An associative array of WP_Meta_Query arguments.
* See WP_Meta_Query::__construct() for accepted values.
* @type int $menu_order The menu order of the posts.
* @type int $minute Minute of the hour. Default empty. Accepts numbers 0-59.
* @type int $monthnum The two-digit month. Default empty. Accepts numbers 1-12.
* @type string $name Post slug.
* @type bool $nopaging Show all posts (true) or paginate (false). Default false.
* @type bool $no_found_rows Whether to skip counting the total rows found. Enabling can improve
* performance. Default false.
* @type int $offset The number of posts to offset before retrieval.
* @type string $order Designates ascending or descending order of posts. Default 'DESC'.
* Accepts 'ASC', 'DESC'.
* @type string|array $orderby Sort retrieved posts by parameter. One or more options may be passed.
* To use 'meta_value', or 'meta_value_num', 'meta_key=keyname' must be
* also be defined. To sort by a specific `$meta_query` clause, use that
* clause's array key. Accepts:
* - 'none'
* - 'name'
* - 'author'
* - 'date'
* - 'title'
* - 'modified'
* - 'menu_order'
* - 'parent'
* - 'ID'
* - 'rand'
* - 'relevance'
* - 'RAND(x)' (where 'x' is an integer seed value)
* - 'comment_count'
* - 'meta_value'
* - 'meta_value_num'
* - 'post__in'
* - 'post_name__in'
* - 'post_parent__in'
* - The array keys of `$meta_query`.
* Default is 'date', except when a search is being performed, when
* the default is 'relevance'.
* @type int $p Post ID.
* @type int $page Show the number of posts that would show up on page X of a
* static front page.
* @type int $paged The number of the current page.
* @type int $page_id Page ID.
* @type string $pagename Page slug.
* @type string $perm Show posts if user has the appropriate capability.
* @type string $ping_status Ping status.
* @type int[] $post__in An array of post IDs to retrieve, sticky posts will be included.
* @type int[] $post__not_in An array of post IDs not to retrieve. Note: a string of comma-
* separated IDs will NOT work.
* @type string $post_mime_type The mime type of the post. Used for 'attachment' post_type.
* @type string[] $post_name__in An array of post slugs that results must match.
* @type int $post_parent Page ID to retrieve child pages for. Use 0 to only retrieve
* top-level pages.
* @type int[] $post_parent__in An array containing parent page IDs to query child pages from.
* @type int[] $post_parent__not_in An array containing parent page IDs not to query child pages from.
* @type string|string[] $post_type A post type slug (string) or array of post type slugs.
* Default 'any' if using 'tax_query'.
* @type string|string[] $post_status A post status (string) or array of post statuses.
* @type int $posts_per_page The number of posts to query for. Use -1 to request all posts.
* @type int $posts_per_archive_page The number of posts to query for by archive page. Overrides
* 'posts_per_page' when is_archive(), or is_search() are true.
* @type string $s Search keyword(s). Prepending a term with a hyphen will
* exclude posts matching that term. Eg, 'pillow -sofa' will
* return posts containing 'pillow' but not 'sofa'. The
* character used for exclusion can be modified using the
* the 'wp_query_search_exclusion_prefix' filter.
* @type int $second Second of the minute. Default empty. Accepts numbers 0-59.
* @type bool $sentence Whether to search by phrase. Default false.
* @type bool $suppress_filters Whether to suppress filters. Default false.
* @type string $tag Tag slug. Comma-separated (either), Plus-separated (all).
* @type int[] $tag__and An array of tag IDs (AND in).
* @type int[] $tag__in An array of tag IDs (OR in).
* @type int[] $tag__not_in An array of tag IDs (NOT in).
* @type int $tag_id Tag id or comma-separated list of IDs.
* @type string[] $tag_slug__and An array of tag slugs (AND in).
* @type string[] $tag_slug__in An array of tag slugs (OR in). unless 'ignore_sticky_posts' is
* true. Note: a string of comma-separated IDs will NOT work.
* @type array $tax_query An associative array of WP_Tax_Query arguments.
* See WP_Tax_Query::__construct().
* @type string $title Post title.
* @type bool $update_post_meta_cache Whether to update the post meta cache. Default true.
* @type bool $update_post_term_cache Whether to update the post term cache. Default true.
* @type bool $update_menu_item_cache Whether to update the menu item cache. Default false.
* @type bool $lazy_load_term_meta Whether to lazy-load term meta. Setting to false will
* disable cache priming for term meta, so that each
* get_term_meta() call will hit the database.
* Defaults to the value of `$update_post_term_cache`.
* @type int $w The week number of the year. Default empty. Accepts numbers 0-53.
* @type int $year The four-digit year. Default empty. Accepts any four-digit year.
* }
*/参考：https://wordpress.stackexchange.com/questions/296566/how-to-search-post-by-id-in-wp-admin
プラグインを使う方が素直なソリューション
Advanced Post Searchはインストールして有効化するとサイトが急激に遅くなる問題があります。更新されていないプラグインなので、使うのは止めた方がよいです。
Advanced Post Searchという管理画面の検索機能を拡張するプラグインがあります。
このプラグインを使うと、検索入力欄が増えるので、検索条件を細かく指定することができます。
おそらくやっていることは、前半のカスタマイズと同じくクエリパラメータを指定しているだけだと思いますが、入力欄が通常の検索とは別にあることで、一気に使いやすくなっています。
Advanced Post Search
Add a search form based on Wordpress fields in posts list
ja.wordpress.org
まとめ
SWELLのフォーラムでslugで検索したいという要望があり、少し調べてみたのですが、なかなか闇が深いなと思いました。
管理画面内でパーマリンクで記事を検索できるようにしてほしい < ご要望
-
users.swell-theme.com
テーマで対応するとslug以外の場合はどうするという話になりますから、汎用的にするとプラグインの方がいいじゃないかという話になるからです。
つまるところ、クエリパラメータを自由に設定できればいいということなので、やれる人は自分で拡張すればいいですし、やれない人はプラグインを使うソリューションが一番良いと思いました。
