REST API: Set default sanitize callback if type is set.

Props joehoyle, ChopinBach, jnylen0.
Fixes #38593.

Built from https://develop.svn.wordpress.org/trunk@39091


git-svn-id: http://core.svn.wordpress.org/trunk@39033 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/class-wp-rest-request.php

@@ -804,6 +804,11 @@ class WP_REST_Request implements ArrayAccess {
 				continue;
 			}
 			foreach ( $this->params[ $type ] as $key => $value ) {
+				// if no sanitize_callback was specified, default to rest_parse_request_arg
+				// if a type was specified in the args.
+				if ( ! isset( $attributes['args'][ $key ]['sanitize_callback'] ) && ! empty( $attributes['args'][ $key ]['type'] ) ) {
+					$attributes['args'][ $key ]['sanitize_callback'] = 'rest_parse_request_arg';
+				}
 				// Check if this param has a sanitize_callback added.
 				if ( ! isset( $attributes['args'][ $key ] ) || empty( $attributes['args'][ $key ]['sanitize_callback'] ) ) {
 					continue;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39090';
+$wp_version = '4.7-beta1-39091';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.