Return cache data in correct order when using wp_cache_get_multiple()

README.md

@@ -3,7 +3,7 @@
 **Tags:** cache, plugin, redis  
 **Requires at least:** 3.0.1  
 **Tested up to:** 5.5  
-**Stable tag:** 1.1.0  
+**Stable tag:** 1.1.1  
 **License:** GPLv2 or later  
 **License URI:** http://www.gnu.org/licenses/gpl-2.0.html  
 
@@ -107,6 +107,9 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 
 ## Changelog ##
 
+### 1.1.1 (August 17, 2020) ###
+* Returns cache data in correct order when using `wp_cache_get_multiple()` and internal cache is already primed [[#292](https://github.com/pantheon-systems/wp-redis/pull/292)].
+
 ### 1.1.0 (July 13, 2020) ###
 * Implements `wp_cache_get_multiple()` for WordPress 5.5 [[#287](https://github.com/pantheon-systems/wp-redis/pull/287)].
 * Bails early when connecting to Redis throws an Exception to avoid fatal error [[285](https://github.com/pantheon-systems/wp-redis/pull/285)].

object-cache.php

@@ -694,14 +694,15 @@ public function get_multiple( $keys, $group = 'default', $force = false ) {
 				}
 			}
 		}
-		$remaining_keys = array_diff( $keys, array_keys( $cache ) );
+		$remaining_keys = array_values( array_diff( $keys, array_keys( $cache ) ) );
 		// If all keys were satisfied by the internal cache, we're sorted.
 		if ( empty( $remaining_keys ) ) {
 			return $cache;
 		}
 		if ( $this->_should_use_redis_hashes( $group ) ) {
 			$redis_safe_group = $this->_key( '', $group );
 			$results          = $this->_call_redis( 'hmGet', $redis_safe_group, $remaining_keys );
+			$results          = is_array( $results ) ? array_values( $results ) : $results;
 		} else {
 			$ids = array();
 			foreach ( $remaining_keys as $key ) {

readme.txt

@@ -3,7 +3,7 @@ Contributors: getpantheon, danielbachhuber, mboynes, Outlandish Josh
 Tags: cache, plugin, redis
 Requires at least: 3.0.1
 Tested up to: 5.5
-Stable tag: 1.1.0
+Stable tag: 1.1.1
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -107,6 +107,9 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 
 == Changelog ==
 
+= 1.1.1 (August 17, 2020) =
+* Returns cache data in correct order when using `wp_cache_get_multiple()` and internal cache is already primed [[#292](https://github.com/pantheon-systems/wp-redis/pull/292)].
+
 = 1.1.0 (July 13, 2020) =
 * Implements `wp_cache_get_multiple()` for WordPress 5.5 [[#287](https://github.com/pantheon-systems/wp-redis/pull/287)].
 * Bails early when connecting to Redis throws an Exception to avoid fatal error [[285](https://github.com/pantheon-systems/wp-redis/pull/285)].

tests/phpunit/test-cache.php

@@ -788,6 +788,40 @@ public function test_get_multiple() {
 		}
 	}
 
+	public function test_get_multiple_partial_cache_miss() {
+		if ( ! class_exists( 'Redis' ) ) {
+			$this->markTestSkipped( 'Requires an active persistent object cache connection' );
+		}
+		$this->cache->set( 'foo1', 'bar', 'group1' );
+		$this->cache->set( 'foo2', 'baz', 'group1' );
+		$this->cache->set( 'foo3', 'bap', 'group1' );
+		// Reset the internal cache.
+		$this->cache->cache = array();
+		// Prime the second item into the internal cache.
+		$this->cache->get( 'foo2', 'group1' );
+
+		$found = $this->cache->get_multiple( array( 'foo1', 'foo2', 'foo3', 'foo4' ), 'group1' );
+
+		$expected = array(
+			'foo1' => 'bar',
+			'foo2' => 'baz',
+			'foo3' => 'bap',
+			'foo4' => false,
+		);
+
+		$this->assertSame( $expected, $found );
+		$this->assertEquals( 4, $this->cache->cache_hits );
+		$this->assertEquals( 1, $this->cache->cache_misses );
+		$this->assertEquals(
+			array(
+				self::$get_key  => 1,
+				self::$mget_key => 1,
+				self::$set_key  => 3,
+			),
+			$this->cache->redis_calls
+		);
+	}
+
 	public function test_get_multiple_non_persistent() {
 		$this->cache->add_non_persistent_groups( array( 'group1' ) );
 		$this->cache->set( 'foo1', 'bar', 'group1' );

wp-redis.php

@@ -3,7 +3,7 @@
  * Plugin Name: WP Redis
  * Plugin URI: http://github.com/pantheon-systems/wp-redis/
  * Description: WordPress Object Cache using Redis. Requires the PhpRedis extension (https://github.com/phpredis/phpredis).
- * Version: 1.1.0
+ * Version: 1.1.1
  * Author: Pantheon, Josh Koenig, Matthew Boynes, Daniel Bachhuber, Alley Interactive
  * Author URI: https://pantheon.io/
  */