REST API: Do not include the password argument when getting media items

Currently, `attachment` is the only post type exposed via the REST API that
does not support password protection, but it's possible for other post types to
remove password support.

Props jnylen0.
Merges [39595] to the 4.7 branch.
Fixes #38977.

Built from https://develop.svn.wordpress.org/branches/4.7@39610


git-svn-id: http://core.svn.wordpress.org/branches/4.7@39550 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php

@@ -77,18 +77,22 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			'schema' => array( $this, 'get_public_item_schema' ),
 		) );
 
+		$schema = $this->get_item_schema();
+		$get_item_args = array(
+			'context'  => $this->get_context_param( array( 'default' => 'view' ) ),
+		);
+		if ( isset( $schema['properties']['password'] ) ) {
+			$get_item_args['password'] = array(
+				'description' => __( 'The password for the post if it is password protected.' ),
+				'type'        => 'string',
+			);
+		}
 		register_rest_route( $this->namespace, '/' . $this->rest_base . '/(?P<id>[\d]+)', array(
 			array(
 				'methods'             => WP_REST_Server::READABLE,
 				'callback'            => array( $this, 'get_item' ),
 				'permission_callback' => array( $this, 'get_item_permissions_check' ),
-				'args'                => array(
-					'context'  => $this->get_context_param( array( 'default' => 'view' ) ),
-					'password' => array(
-						'description' => __( 'The password for the post if it is password protected.' ),
-						'type'        => 'string',
-					),
-				),
+				'args'                => $get_item_args,
 			),
 			array(
 				'methods'             => WP_REST_Server::EDITABLE,

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7.1-alpha-39609';
+$wp_version = '4.7.1-alpha-39610';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.