REST API: Cast revision author ID to int.

The `post_author` field is a string internally, but we need to cast it to an integer in the REST API.  This was already done for posts, but not for revisions.  The field is already declared as an integer in both controllers.

Fixes #39871.


git-svn-id: https://develop.svn.wordpress.org/trunk@40063 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php

@@ -344,7 +344,7 @@ public function prepare_item_for_response( $post, $request ) {
 		$data = array();
 
 		if ( ! empty( $schema['properties']['author'] ) ) {
-			$data['author'] = $post->post_author;
+			$data['author'] = (int) $post->post_author;
 		}
 
 		if ( ! empty( $schema['properties']['date'] ) ) {

tests/phpunit/tests/rest-api/rest-revisions-controller.php

@@ -27,8 +27,10 @@ public static function wpSetUpBeforeClass( $factory ) {
 			'role' => 'contributor',
 		) );
 
+		wp_set_current_user( self::$editor_id );
 		wp_update_post( array( 'post_content' => 'This content is better.', 'ID' => self::$post_id ) );
 		wp_update_post( array( 'post_content' => 'This content is marvelous.', 'ID' => self::$post_id ) );
+		wp_set_current_user( 0 );
 	}
 
 	public static function wpTearDownAfterClass() {
@@ -136,6 +138,7 @@ public function test_get_item() {
 		);
 		$data = $response->get_data();
 		$this->assertEqualSets( $fields, array_keys( $data ) );
+		$this->assertSame( self::$editor_id, $data['author'] );
 	}
 
 	public function test_get_item_embed_context() {