From 5a63ae324ea3f501b74bbea00e25d9c9143f5ee8 Mon Sep 17 00:00:00 2001
From: Qiang Xue <qiang.xue@gmail.com>
Date: Wed, 25 Feb 2015 23:06:42 -0500
Subject: [PATCH] Fixes #7211: Query caching should properly deal with the case
 when query result is false

---
 framework/CHANGELOG.md   | 1 +
 framework/db/Command.php | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index d6ee3222d3..9c6ac66d06 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -11,6 +11,7 @@ Yii Framework 2 Change Log
 - Bug #7037: `yii\console\controllers\AssetController` now correctly handles relative image URLs if source and target CSS are under same directory (klimov-paul)
 - Bug #7055: composite IN condition was not generated correctly for certain DBMS (nineinchnick)
 - Bug #7074: `yii\data\ArrayDataProvider` did not correctly handle the case `Pagination::pageSize = 0` (kirsenn, qiangxue)
+- Bug #7211: Query caching should properly deal with the case when query result is false (qiangxue)
 - Bug #7218: `yii\captcha\CaptchaAction` should send response in JSON format (InteLigent, qiangxue)
 - Bug #7226: `yii\web\Request::getEtag()` should strip off `-gzip` which may be added by Apache (mcd-php)
 - Bug #7227: Query builder should respect column alias setting when `yii\db\Expression` is being selected (mdmunir, qiangxue)
diff --git a/framework/db/Command.php b/framework/db/Command.php
index 4398417d9a..d88d13f3c8 100644
--- a/framework/db/Command.php
+++ b/framework/db/Command.php
@@ -805,9 +805,10 @@ class Command extends Component
                     $this->db->username,
                     $rawSql,
                 ];
-                if (($result = $cache->get($cacheKey)) !== false) {
+                $result = $cache->get($cacheKey);
+                if (is_array($result) && isset($result[0])) {
                     Yii::trace('Query result served from cache', 'yii\db\Command::query');
-                    return $result;
+                    return $result[0];
                 }
             }
         }
@@ -837,7 +838,7 @@ class Command extends Component
         }
 
         if (isset($cache, $cacheKey, $info)) {
-            $cache->set($cacheKey, $result, $info[1], $info[2]);
+            $cache->set($cacheKey, [$result], $info[1], $info[2]);
             Yii::trace('Saved query result in cache', 'yii\db\Command::query');
         }