int() argument must be a string or a number, not 'SimpleLazyObject'

今天遇到如下问题：

medias_all = Media.objects.filter(Q(is_delete=0),
                                  Q(media_name__contains=query) | 
                                  Q(media_id__contains=query)
                                  ).order_by("add_date")

medias = medias_all.filter(user=request.user)

出现如下错误：

int() argument must be a string or a number, not 'SimpleLazyObject'

google了一下，http://stackoverflow.com/questions/15878860/int-argument-must-be-a-string-or-a-number-not-simplelazyobject 这样说：

The likely cause is that you're setting user = request.user, where request.user is not a real User object, but a SimpleLazyObject instance. Seedjango: Purpose of django.utils.functional.SimpleLazyObject? for more details, but usingrequest.user.id should fix your issue.

由此修改为：

medias = medias_all.filter(user_id=request.user.id)

问题解决。