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Prime users cache in WP_Query and post REST API controller.
For a call to `WP_Query` or a post REST API request that contains posts from multiple authors, call the `cache_users` function, to ensure that all user data for post authors is primed in a single database query. This results in far fewer database queries on multiple author sites. Props spacedmonkey, timothyblynjacobs, peterwilsoncc. Fixes #55716. Built from https://develop.svn.wordpress.org/trunk@53482 git-svn-id: http://core.svn.wordpress.org/trunk@53071 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@ -3434,6 +3434,9 @@ class WP_Query {
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*/
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*/
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public function the_post() {
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public function the_post() {
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global $post;
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global $post;
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if ( ! $this->in_the_loop ) {
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update_post_author_caches( $this->posts );
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}
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$this->in_the_loop = true;
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$this->in_the_loop = true;
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if ( -1 == $this->current_post ) { // Loop has just started.
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if ( -1 == $this->current_post ) { // Loop has just started.
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@ -132,6 +132,8 @@ if ( ! function_exists( 'cache_users' ) ) :
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function cache_users( $user_ids ) {
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function cache_users( $user_ids ) {
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global $wpdb;
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global $wpdb;
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update_meta_cache( 'user', $user_ids );
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$clean = _get_non_cached_ids( $user_ids, 'users' );
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$clean = _get_non_cached_ids( $user_ids, 'users' );
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if ( empty( $clean ) ) {
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if ( empty( $clean ) ) {
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@ -141,13 +143,9 @@ if ( ! function_exists( 'cache_users' ) ) :
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$list = implode( ',', $clean );
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$list = implode( ',', $clean );
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$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
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$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );
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$ids = array();
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foreach ( $users as $user ) {
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foreach ( $users as $user ) {
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update_user_caches( $user );
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update_user_caches( $user );
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$ids[] = $user->ID;
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}
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}
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update_meta_cache( 'user', $ids );
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}
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}
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endif;
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endif;
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@ -7474,6 +7474,20 @@ function update_post_caches( &$posts, $post_type = 'post', $update_term_cache =
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}
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}
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}
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}
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/**
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* Prime post author user caches.
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*
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* @since 6.1.0
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*
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* @param WP_Post[] $posts Array of Post objects
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*/
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function update_post_author_caches( $posts ) {
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$author_ids = wp_list_pluck( $posts, 'post_author' );
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$author_ids = array_map( 'absint', $author_ids );
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$author_ids = array_unique( array_filter( $author_ids ) );
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cache_users( $author_ids );
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}
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/**
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/**
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* Updates metadata cache for list of post IDs.
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* Updates metadata cache for list of post IDs.
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*
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*
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@ -369,6 +369,8 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
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$posts = array();
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$posts = array();
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update_post_author_caches( $query_result );
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foreach ( $query_result as $post ) {
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foreach ( $query_result as $post ) {
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if ( ! $this->check_read_permission( $post ) ) {
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if ( ! $this->check_read_permission( $post ) ) {
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continue;
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continue;
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@ -16,7 +16,7 @@
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*
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*
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* @global string $wp_version
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* @global string $wp_version
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*/
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*/
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$wp_version = '6.1-alpha-53481';
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$wp_version = '6.1-alpha-53482';
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/**
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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