diff --git a/apps/assets/models.py b/apps/assets/models.py
index 5ceca9647..46d13922e 100644
--- a/apps/assets/models.py
+++ b/apps/assets/models.py
@@ -322,8 +322,8 @@ class Asset(models.Model):
     created_by = models.CharField(max_length=32, null=True, blank=True, verbose_name=_('Created by'))
     is_active = models.BooleanField(default=True, verbose_name=_('Is active'))
     date_created = models.DateTimeField(auto_now_add=True, null=True, blank=True, verbose_name=_('Date added'))
-    comment = models.TextField(max_length=128, null=True, blank=True, verbose_name=_('Comment'))
-    tags = models.ManyToManyField('Tag', verbose_name='标签集合', blank=True)
+    comment = models.TextField(max_length=128, default='', blank=True, verbose_name=_('Comment'))
+    tags = models.ManyToManyField('Tag', blank=True, verbose_name=_('Tags'))
 
     def __unicode__(self):
         return '%(ip)s:%(port)s' % {'ip': self.ip, 'port': self.port}
diff --git a/apps/audits/api.py b/apps/audits/api.py
index 8b20f16c2..4f11f6d68 100644
--- a/apps/audits/api.py
+++ b/apps/audits/api.py
@@ -2,10 +2,10 @@
 # 
 
 
+from __future__ import absolute_import, unicode_literals
 from rest_framework import generics
 
-import serializers
-import models
+from . import models, serializers
 from .hands import IsSuperUserOrTerminalUser, Terminal
 
 
diff --git a/apps/audits/serializers.py b/apps/audits/serializers.py
index 1b2485657..aaf9c3f68 100644
--- a/apps/audits/serializers.py
+++ b/apps/audits/serializers.py
@@ -1,9 +1,9 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# 
+#
+from __future__ import absolute_import, unicode_literals
 from rest_framework import serializers
 
-import models
+from . import models
 
 
 class ProxyLogSerializer(serializers.ModelSerializer):
diff --git a/apps/perms/serializers.py b/apps/perms/serializers.py
index f630d5f0d..f19a64d9a 100644
--- a/apps/perms/serializers.py
+++ b/apps/perms/serializers.py
@@ -1,14 +1,4 @@
 # -*- coding: utf-8 -*-
 #
 
-from rest_framework import serializers
 
-
-class TerminalHeatbeatSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = TerminalHeatbeat
-        fields = ['terminal']
-
-
-if __name__ == '__main__':
-    pass
diff --git a/apps/terminal/api.py b/apps/terminal/api.py
index d055781c6..a0bda4e55 100644
--- a/apps/terminal/api.py
+++ b/apps/terminal/api.py
@@ -18,6 +18,7 @@ class TerminalCreateListApi(ListCreateAPIView):
 
     def post(self, request, *args, **kwargs):
         name = unsign(request.data.get('name', ''))
+        print(name)
         if name:
             terminal = get_object_or_none(Terminal, name=name)
             if terminal: