修改device_name_language表默认排序字段为sort2

Model/models.py

@@ -1712,7 +1712,7 @@ class DeviceNameLanguage(models.Model):
     sort = models.SmallIntegerField(default=0, verbose_name=u'升序排序')
 
     class Meta:
-        ordering = 'sort'
+        ordering = ('sort',)
         db_table = 'device_name_language'
         verbose_name = '设备名称语言表'
         verbose_name_plural = verbose_name