WP_REST_Posts_Controller::prepare_items_query( array $prepared_args = array(), WP_REST_Request $request = null ): array

1215	protected function prepare_items_query( $prepared_args = array(), $request = null ) {1216		$query_args = array();1217		if ( ! is_array( $prepared_args ) ) {1218			$prepared_args = array();1219		}1220 1221		foreach ( $prepared_args as $key => $value ) {1222			/**1223			 * Filters the query_vars used in get_items() for the constructed query.1224			 *1225			 * The dynamic portion of the hook name, `$key`, refers to the query_var key.1226			 *1227			 * @since 4.7.01228			 *1229			 * @param string $value The query_var value.1230			 */1231			$query_args[ $key ] = apply_filters( "rest_query_var-{$key}", $value ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores1232		}1233 1234		if ( 'post' !== $this->post_type || ! isset( $query_args['ignore_sticky_posts'] ) ) {1235			$query_args['ignore_sticky_posts'] = true;1236		}1237 1238		// Map to proper WP_Query orderby param.1239		if ( isset( $query_args['orderby'] ) && isset( $request['orderby'] ) ) {1240			$orderby_mappings = array(1241				'id'            => 'ID',1242				'include'       => 'post__in',1243				'slug'          => 'post_name',1244				'include_slugs' => 'post_name__in',1245			);1246 1247			if ( isset( $orderby_mappings[ $request['orderby'] ] ) ) {1248				$query_args['orderby'] = $orderby_mappings[ $request['orderby'] ];1249			}1250		}1251 1252		return $query_args;1253	}