Pickle django 查询？

是否可以在数据库中腌制或以某种方式存储 django 查询？这是行不通的：

u = User.objects.all 
import cPickle
pickled_query = cPickle.dumps(u) # and store the pickled_query in a db-field.

有什么想法吗？

Updated:

import cPickle

class CustomData(models.Model):
    name = models.CharField(max_length = 30)
    pickled_query = models.CharField(max_length = 300)

def get_custom_result(self):
    q = cPickle.loads(self.pickled_query)
    return q()

>>> cd = CustomData(name="My data", pickled_query=cPickle.dumps(User.objects.all))
>>> cd.save()
>>> for item in cd.get_custom_result(): print item
# prints all the users in the database, not printing the query result 
# when pickled, but when called like cd.get_custom_result(), that is when 
# the query is actually executed.

现在这就是我想做的。我知道这段实际的代码不会运行，但它表明了我的意图；存储查询而不是结果，并在将来的某个时刻执行该查询。

更新#2：

>>> from django.contrib.auth.models import User
# adds two users; super and test
>>> u = User.objects.filter(username = 'test')
>>> import cPickle
>>> s = cPickle.dumps(u.query)
>>> s2 = cPickle.loads(s)
>>> o = s2.model.objects.all()
>>> o.query = s2
>>> for i in o: print i
...
super

还是不完全满意。我知道 QuerySet 很懒，所以执行 s2.model.objects.all() 不会执行获取所有用户的查询？

There's 文档 http://docs.djangoproject.com/en/dev/ref/models/querysets/#pickling-querysets为了那个原因。基本上，腌制query如果要重新创建 SQL 查询，请使用属性；如果要腌制当前结果的快照，请腌制整个查询集。

如果你腌制了结果，你的例子会做后者all()而不是绑定方法。