WP_REST_Comments_Controller::get_items( WP_REST_Request $request ): WP_REST_Response|WP_Error

In this article

Retrieves a list of comment items.

Parameters

$requestWP_REST_Requestrequired
Full details about the request.

Return

WP_REST_Response|WP_Error Response object on success, or error object on failure.

Source

public function get_items( $request ) {

	// Retrieve the list of registered collection query parameters.
	$registered = $this->get_collection_params();

	/*
	 * 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_email'   => 'author_email',
		'author_exclude' => 'author__not_in',
		'exclude'        => 'comment__not_in',
		'include'        => 'comment__in',
		'offset'         => 'offset',
		'order'          => 'order',
		'parent'         => 'parent__in',
		'parent_exclude' => 'parent__not_in',
		'per_page'       => 'number',
		'post'           => 'post__in',
		'search'         => 'search',
		'status'         => 'status',
		'type'           => 'type',
	);

	$prepared_args = array();

	/*
	 * For each known parameter which is both registered and present in the request,
	 * set the parameter's value on the query $prepared_args.
	 */
	foreach ( $parameter_mappings as $api_param => $wp_param ) {
		if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
			$prepared_args[ $wp_param ] = $request[ $api_param ];
		}
	}

	// Ensure certain parameter values default to empty strings.
	foreach ( array( 'author_email', 'search' ) as $param ) {
		if ( ! isset( $prepared_args[ $param ] ) ) {
			$prepared_args[ $param ] = '';
		}
	}

	if ( isset( $registered['orderby'] ) ) {
		$prepared_args['orderby'] = $this->normalize_query_param( $request['orderby'] );
	}

	$prepared_args['no_found_rows'] = false;

	$prepared_args['update_comment_post_cache'] = true;

	$prepared_args['date_query'] = array();

	// Set before into date query. Date query must be specified as an array of an array.
	if ( isset( $registered['before'], $request['before'] ) ) {
		$prepared_args['date_query'][0]['before'] = $request['before'];
	}

	// Set after into date query. Date query must be specified as an array of an array.
	if ( isset( $registered['after'], $request['after'] ) ) {
		$prepared_args['date_query'][0]['after'] = $request['after'];
	}

	if ( isset( $registered['page'] ) && empty( $request['offset'] ) ) {
		$prepared_args['offset'] = $prepared_args['number'] * ( absint( $request['page'] ) - 1 );
	}

	/**
	 * Filters WP_Comment_Query arguments when querying comments via the REST API.
	 *
	 * @since 4.7.0
	 *
	 * @link https://developer.wordpress.org/reference/classes/wp_comment_query/
	 *
	 * @param array           $prepared_args Array of arguments for WP_Comment_Query.
	 * @param WP_REST_Request $request       The REST API request.
	 */
	$prepared_args = apply_filters( 'rest_comment_query', $prepared_args, $request );

	$query        = new WP_Comment_Query();
	$query_result = $query->query( $prepared_args );

	$comments = array();

	foreach ( $query_result as $comment ) {
		if ( ! $this->check_read_permission( $comment, $request ) ) {
			continue;
		}

		$data       = $this->prepare_item_for_response( $comment, $request );
		$comments[] = $this->prepare_response_for_collection( $data );
	}

	$total_comments = (int) $query->found_comments;
	$max_pages      = (int) $query->max_num_pages;

	if ( $total_comments < 1 ) {
		// Out-of-bounds, run the query again without LIMIT for total count.
		unset( $prepared_args['number'], $prepared_args['offset'] );

		$query                    = new WP_Comment_Query();
		$prepared_args['count']   = true;
		$prepared_args['orderby'] = 'none';

		$total_comments = $query->query( $prepared_args );
		$max_pages      = ceil( $total_comments / $request['per_page'] );
	}

	$response = rest_ensure_response( $comments );
	$response->header( 'X-WP-Total', $total_comments );
	$response->header( 'X-WP-TotalPages', $max_pages );

	$base = add_query_arg( urlencode_deep( $request->get_query_params() ), rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ) );

	if ( $request['page'] > 1 ) {
		$prev_page = $request['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 > $request['page'] ) {
		$next_page = $request['page'] + 1;
		$next_link = add_query_arg( 'page', $next_page, $base );

		$response->link_header( 'next', $next_link );
	}

	return $response;
}

Hooks

apply_filters( ‘rest_comment_query’, array $prepared_args, WP_REST_Request $request )

Filters WP_Comment_Query arguments when querying comments via the REST API.

Changelog

VersionDescription
4.7.0Introduced.

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