fix

@@ -544,7 +544,7 @@ class AdminModel extends global.yoho.BaseModel {
                         type: 'number'
                     },
                     {
-                        caption: 'uid',
+                        caption: 'UID',
                         type: 'number'
                     },
                     {
@@ -552,7 +552,7 @@ class AdminModel extends global.yoho.BaseModel {
                         type: 'string'
                     },
                     {
-                        caption: '邀请码',
+                        caption: '抽奖码',
                         type: 'string'
                     },
                     {
@@ -740,7 +740,7 @@ class AdminModel extends global.yoho.BaseModel {
             userList.push(value.uid);
         });
 
-        userList = _.uniq(userList);
+        userList = _.compact(_.uniq(userList));
 
         if (!userList.length) {
             return Promise.resolve();