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 6.5.2
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;
}