Merge branch 'revise_reply_time' into 'master'

revise reply time

See merge request alpha/physical!402

trans2es/models/topic.py

@@ -325,8 +325,13 @@ class Topic(models.Model):
                     if UserExtra_results.count()>0:
                        if not UserExtra_results[0]['is_shadow']:
                         datetime_list.append(reply['create_time'])
-                dt = max(datetime_list)
-                return datetime.datetime(dt.year,dt.month,dt.day,dt.hour, dt.minute, dt.second,tzinfo=datetime.timezone(datetime.timedelta(hours=8)))
+                if len(datetime_list)>0:
+                   dt = max(datetime_list)
+                   return datetime.datetime(dt.year,dt.month,dt.day,dt.hour, dt.minute, dt.second,tzinfo=datetime.timezone(datetime.timedelta(hours=8)))
+                else:
+                    dt = self.create_time
+                    return datetime.datetime(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
+                                             tzinfo=datetime.timezone(datetime.timedelta(hours=8)))
             else:
                 dt = self.create_time
                 return datetime.datetime(dt.year,dt.month,dt.day,dt.hour, dt.minute, dt.second,tzinfo=datetime.timezone(datetime.timedelta(hours=8)))