WP_REST_Posts_Controller::get_items() │ public │ WP 4.7.0
Retrieves a collection of posts.
Method of the class: WP_REST_Posts_Controller{}
Hooks from the method
Return
WP_REST_Response|WP_Error
. Response object on success, or WP_Error object on failure.
Usage
$WP_REST_Posts_Controller = new WP_REST_Posts_Controller(); $WP_REST_Posts_Controller->get_items( $request );
- $request(WP_REST_Request) (required)
- Full details about the request.
Changelog
Since 4.7.0 | Introduced. |
WP_REST_Posts_Controller::get_items() WP REST Posts Controller::get items code WP 6.6.2
public function get_items( $request ) { // Ensure a search string is set in case the orderby is set to 'relevance'. if ( ! empty( $request['orderby'] ) && 'relevance' === $request['orderby'] && empty( $request['search'] ) ) { return new WP_Error( 'rest_no_search_term_defined', __( 'You need to define a search term to order by relevance.' ), array( 'status' => 400 ) ); } // Ensure an include parameter is set in case the orderby is set to 'include'. if ( ! empty( $request['orderby'] ) && 'include' === $request['orderby'] && empty( $request['include'] ) ) { return new WP_Error( 'rest_orderby_include_missing_include', __( 'You need to define an include parameter to order by include.' ), array( 'status' => 400 ) ); } // Retrieve the list of registered collection query parameters. $registered = $this->get_collection_params(); $args = array(); /* * This array defines mappings between public API query parameters whose * values are accepted as-passed, and their internal WP_Query parameter * name equivalents (some are the same). Only values which are also * present in $registered will be set. */ $parameter_mappings = array( 'author' => 'author__in', 'author_exclude' => 'author__not_in', 'exclude' => 'post__not_in', 'include' => 'post__in', 'menu_order' => 'menu_order', 'offset' => 'offset', 'order' => 'order', 'orderby' => 'orderby', 'page' => 'paged', 'parent' => 'post_parent__in', 'parent_exclude' => 'post_parent__not_in', 'search' => 's', 'search_columns' => 'search_columns', 'slug' => 'post_name__in', 'status' => 'post_status', ); /* * For each known parameter which is both registered and present in the request, * set the parameter's value on the query $args. */ foreach ( $parameter_mappings as $api_param => $wp_param ) { if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) { $args[ $wp_param ] = $request[ $api_param ]; } } // Check for & assign any parameters which require special handling or setting. $args['date_query'] = array(); if ( isset( $registered['before'], $request['before'] ) ) { $args['date_query'][] = array( 'before' => $request['before'], 'column' => 'post_date', ); } if ( isset( $registered['modified_before'], $request['modified_before'] ) ) { $args['date_query'][] = array( 'before' => $request['modified_before'], 'column' => 'post_modified', ); } if ( isset( $registered['after'], $request['after'] ) ) { $args['date_query'][] = array( 'after' => $request['after'], 'column' => 'post_date', ); } if ( isset( $registered['modified_after'], $request['modified_after'] ) ) { $args['date_query'][] = array( 'after' => $request['modified_after'], 'column' => 'post_modified', ); } // Ensure our per_page parameter overrides any provided posts_per_page filter. if ( isset( $registered['per_page'] ) ) { $args['posts_per_page'] = $request['per_page']; } if ( isset( $registered['sticky'], $request['sticky'] ) ) { $sticky_posts = get_option( 'sticky_posts', array() ); if ( ! is_array( $sticky_posts ) ) { $sticky_posts = array(); } if ( $request['sticky'] ) { /* * As post__in will be used to only get sticky posts, * we have to support the case where post__in was already * specified. */ $args['post__in'] = $args['post__in'] ? array_intersect( $sticky_posts, $args['post__in'] ) : $sticky_posts; /* * If we intersected, but there are no post IDs in common, * WP_Query won't return "no posts" for post__in = array() * so we have to fake it a bit. */ if ( ! $args['post__in'] ) { $args['post__in'] = array( 0 ); } } elseif ( $sticky_posts ) { /* * As post___not_in will be used to only get posts that * are not sticky, we have to support the case where post__not_in * was already specified. */ $args['post__not_in'] = array_merge( $args['post__not_in'], $sticky_posts ); } } $args = $this->prepare_tax_query( $args, $request ); // Force the post_type argument, since it's not a user input variable. $args['post_type'] = $this->post_type; /** * Filters WP_Query arguments when querying posts via the REST API. * * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug. * * Possible hook names include: * * - `rest_post_query` * - `rest_page_query` * - `rest_attachment_query` * * Enables adding extra arguments or setting defaults for a post collection request. * * @since 4.7.0 * @since 5.7.0 Moved after the `tax_query` query arg is generated. * * @link https://developer.wordpress.org/reference/classes/wp_query/ * * @param array $args Array of arguments for WP_Query. * @param WP_REST_Request $request The REST API request. */ $args = apply_filters( "rest_{$this->post_type}_query", $args, $request ); $query_args = $this->prepare_items_query( $args, $request ); $posts_query = new WP_Query(); $query_result = $posts_query->query( $query_args ); // Allow access to all password protected posts if the context is edit. if ( 'edit' === $request['context'] ) { add_filter( 'post_password_required', array( $this, 'check_password_required' ), 10, 2 ); } $posts = array(); update_post_author_caches( $query_result ); update_post_parent_caches( $query_result ); if ( post_type_supports( $this->post_type, 'thumbnail' ) ) { update_post_thumbnail_cache( $posts_query ); } foreach ( $query_result as $post ) { if ( ! $this->check_read_permission( $post ) ) { continue; } $data = $this->prepare_item_for_response( $post, $request ); $posts[] = $this->prepare_response_for_collection( $data ); } // Reset filter. if ( 'edit' === $request['context'] ) { remove_filter( 'post_password_required', array( $this, 'check_password_required' ) ); } $page = (int) $query_args['paged']; $total_posts = $posts_query->found_posts; if ( $total_posts < 1 && $page > 1 ) { // Out-of-bounds, run the query again without LIMIT for total count. unset( $query_args['paged'] ); $count_query = new WP_Query(); $count_query->query( $query_args ); $total_posts = $count_query->found_posts; } $max_pages = (int) ceil( $total_posts / (int) $posts_query->query_vars['posts_per_page'] ); if ( $page > $max_pages && $total_posts > 0 ) { return new WP_Error( 'rest_post_invalid_page_number', __( 'The page number requested is larger than the number of pages available.' ), array( 'status' => 400 ) ); } $response = rest_ensure_response( $posts ); $response->header( 'X-WP-Total', (int) $total_posts ); $response->header( 'X-WP-TotalPages', (int) $max_pages ); $request_params = $request->get_query_params(); $collection_url = rest_url( rest_get_route_for_post_type_items( $this->post_type ) ); $base = add_query_arg( urlencode_deep( $request_params ), $collection_url ); if ( $page > 1 ) { $prev_page = $page - 1; if ( $prev_page > $max_pages ) { $prev_page = $max_pages; } $prev_link = add_query_arg( 'page', $prev_page, $base ); $response->link_header( 'prev', $prev_link ); } if ( $max_pages > $page ) { $next_page = $page + 1; $next_link = add_query_arg( 'page', $next_page, $base ); $response->link_header( 'next', $next_link ); } return $response; }