From 5eab3a4a693b5b97e39f767f840c64a2a6bcf0a0 Mon Sep 17 00:00:00 2001
From: DIYgod <diy.d.god@gmail.com>
Date: Tue, 12 Mar 2019 14:44:28 +0800
Subject: [PATCH] fix null cache type, close #1728 #1730

---
 lib/middleware/cache.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/middleware/cache.js b/lib/middleware/cache.js
index 71b490c28b..5feddf2f40 100644
--- a/lib/middleware/cache.js
+++ b/lib/middleware/cache.js
@@ -109,6 +109,11 @@ module.exports = function(app, options = {}) {
             }
         };
         available = true;
+    } else {
+        app.context.cache = {
+            get: () => null,
+            set: () => null,
+        };
     }
 
     app.context.cache.tryGet = async function(key, getValueFunc, maxAge = 24 * 60 * 60) {