Ticket #42069: 42069.9.diff

src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php

@@ -295 +295 @@
                         );
                 }
 
-                $meta_key   = wp_slash( $meta_key );
-                $meta_value = wp_slash( $value );
-
                 // Do the exact same check for a duplicate value as in update_metadata() to avoid update_metadata() returning false.
                 $old_value = get_metadata( $meta_type, $object_id, $meta_key );
+                $subtype   = get_object_subtype( $meta_type, $object_id );
 
                 if ( 1 === count( $old_value ) ) {
-                        if ( $old_value[0] === $meta_value ) {
+                        if ( (string) sanitize_meta( $meta_key, $value, $meta_type, $subtype ) === $old_value[0] ) {
                                 return true;
                         }
                 }
 
-                if ( ! update_metadata( $meta_type, $object_id, $meta_key, $meta_value ) ) {
+                if ( ! update_metadata( $meta_type, $object_id, wp_slash( $meta_key ), wp_slash( $value ) ) ) {
                         return new WP_Error(
                                 'rest_meta_database_error',
                                 __( 'Could not update meta value in database.' ),

tests/phpunit/tests/rest-api/rest-post-meta-fields.php

@@ -20 +20 @@
                         'supports'     => array( 'custom-fields' ),
                 ) );
 
-                self::$wp_meta_keys_saved = $GLOBALS['wp_meta_keys'];
+                self::$wp_meta_keys_saved = isset( $GLOBALS['wp_meta_keys'] ) ? $GLOBALS['wp_meta_keys'] : array();
                 self::$post_id = $factory->post->create();
                 self::$cpt_post_id        = $factory->post->create( array( 'post_type' => 'cpt' ) );
         }
@@ -130 +130 @@
                         'auth_callback'  => '__return_false',
                 ) );
 
+                register_meta(
+                        'post',
+                        'test_boolean_update',
+                        array(
+                                'single'            => true,
+                                'type'              => 'boolean',
+                                'sanitize_callback' => 'absint',
+                                'show_in_rest'      => true,
+                        )
+                );
+
+                register_meta(
+                        'post',
+                        'test_textured_text_update',
+                        array(
+                                'single'            => true,
+                                'type'              => 'string',
+                                'sanitize_callback' => 'sanitize_text_field',
+                                'show_in_rest'      => true,
+                        )
+                );
+
+                register_meta(
+                        'post',
+                        'test_json_encoded',
+                        array(
+                                'single'       => true,
+                                'type'         => 'string',
+                                'show_in_rest' => true,
+                        )
+                );
+
+                register_meta(
+                        'post',
+                        'test\'slashed\'key',
+                        array(
+                                'single'       => true,
+                                'type'         => 'string',
+                                'show_in_rest' => true,
+                        )
+                );
+
                 /** @var WP_REST_Server $wp_rest_server */
                 global $wp_rest_server;
                 $this->server = $wp_rest_server = new Spy_REST_Server;
@@ -1161 +1203 @@
                 return $data;
         }
 
+        /**
+         * @ticket 42069
+         * @dataProvider data_update_value_return_success_with_same_value
+         */
+        public function test_update_value_return_success_with_same_value( $meta_key, $meta_value ) {
+                add_post_meta( self::$post_id, $meta_key, $meta_value );
+
+                $this->grant_write_permission();
+
+                $data = array(
+                        'meta' => array(
+                                $meta_key => $meta_value,
+                        ),
+                );
+
+                $request = new WP_REST_Request( 'POST', sprintf( '/wp/v2/posts/%d', self::$post_id ) );
+                $request->set_body_params( $data );
+
+                $response = rest_get_server()->dispatch( $request );
+
+                $this->assertEquals( 200, $response->get_status() );
+        }
+
+        public function data_update_value_return_success_with_same_value() {
+                return array(
+                        array( 'test_boolean_update', false ),
+                        array( 'test_boolean_update', true ),
+                        array( 'test_textured_text_update', 'She said, "What about the > 10,000 penguins in the kitchen?"' ),
+                        array( 'test_textured_text_update', "He's about to do something rash..." ),
+                        array( 'test_json_encoded', json_encode( array( 'foo' => 'bar' ) ) ),
+                        array( 'test\'slashed\'key', 'Hello' ),
+                );
+        }
+
+        /**
+         * @ticket 42069
+         */
+        public function test_slashed_meta_key() {
+
+                add_post_meta( self::$post_id, 'test\'slashed\'key', 'Hello' );
+
+                $request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/posts/%d', self::$post_id ) );
+
+                $response = rest_get_server()->dispatch( $request );
+                $data     = $response->get_data();
+
+                $this->assertArrayHasKey( 'test\'slashed\'key', $data['meta'] );
+                $this->assertEquals( 'Hello', $data['meta']['test\'slashed\'key'] );
+        }
+
         /**
          * Internal function used to disable an insert query which
          * will trigger a wpdb error for testing purposes.