Merge pull request #3918 from jumpserver/fix_connectivity

[Update] 修复资产页面可连接性

apps/assets/models/utils.py

@@ -77,7 +77,7 @@ class Connectivity:
         return cls(cls.UNKNOWN, timezone.now())
 
     @classmethod
-    def set(cls, key, value, ttl=0):
+    def set(cls, key, value, ttl=None):
         cache.set(key, value, ttl)
 
     @classmethod