Django model中的save后的return

先给结论吧:在Django model的操作函数中,obj.save()后再执行return obj会返回obj的ID。

看例子:

...
def create_session(self,bind_host_obj,random_tag):
    session_obj = models.SessionRecord(
        user = self.user,
        bind_host = bind_host_obj,
        rand_tag = random_tag
        )
   session_obj.save()
   return session_obj