diff --git a/class/core/mw.py b/class/core/mw.py
index 181e52c75..b54ad11dd 100755
--- a/class/core/mw.py
+++ b/class/core/mw.py
@@ -908,6 +908,11 @@ def aesDecrypt_Crypto(data, key, vi):
     text_decrypted = text_decrypted.decode('utf8').rstrip()  # 去掉补位的右侧空格
     return text_decrypted
 
+def getDefault(data,val,def_val=''):
+    if val in data:
+        return data[val]
+    return def_val
+
 def encodeImage(imgsrc, newsrc):
     # 图片加密
     import struct
diff --git a/plugins/mongodb/index.py b/plugins/mongodb/index.py
index 40f8efdb8..2faa3efa6 100755
--- a/plugins/mongodb/index.py
+++ b/plugins/mongodb/index.py
@@ -220,7 +220,6 @@ def runDocInfo():
     result["dbs"] = showDbList
     return mw.getJson(result)
 
-
 def runReplInfo():
     import pymongo
     
@@ -242,11 +241,11 @@ def runReplInfo():
         if 'secondary' in repl and not repl['secondary']:
             result['status'] = '主'
 
-        result['setName'] = repl['setName']
-        result['primary'] = repl['primary']
-        result['me'] = repl['me']
+        result['setName'] = mw.getDefault(repl,'setName', '') 
+        result['primary'] = mw.getDefault(repl,'primary', '') 
+        result['me'] = mw.getDefault(repl,'me', '') 
 
-        hosts = repl['hosts']
+        hosts = mw.getDefault(repl,'hosts', '') 
         result['hosts'] = ','.join(hosts)