diff --git a/models/Campus.py b/models/Campus.py
index 4859409..f4e9cef 100644
--- a/models/Campus.py
+++ b/models/Campus.py
@@ -11,12 +11,12 @@ class Campus(db.Model):
     master_user_id = db.IntegerProperty(required=True)
 
     def to_JSON(self):
-        dick = {'title': self.title,
+        data = {'title': self.title,
                 'email_ending': self.email_ending,
                 'master_user_id': self.master_user_id,
                 'avatar_url': self.avatar_url
                 }
-        return json.dumps(dick)
+        return json.dumps(data)
 
 
 """
diff --git a/models/User.py b/models/User.py
index ed0e2c1..c336d36 100644
--- a/models/User.py
+++ b/models/User.py
@@ -12,8 +12,8 @@ class User(db.Model):
     seToken = db.StringProperty(required=True)
     avatar_url = db.StringProperty(required=True)
     isFirstLogin = db.BooleanProperty(default=True)
-    campuses_id_list = db.StringListProperty()
-    classes_id_list = db.StringListProperty()
+    campuses_id_list = db.StringListProperty(default=[])
+    classes_id_list = db.StringListProperty(default=[])
 
     def to_JSON(self):
         data = {'username' : self.username,