是关于排序的.
该例子在django的网站上:
http://www.djangoproject.com/documentation/0_91/db_api/
两个Model定义如下.

class Poll(meta.Model):
    question = meta.CharField(maxlength=255)
    pub_date = meta.DateTimeField()
    expire_date = meta.DateTimeField()

    def __repr__(self):
        return self.question

class Choice(meta.Model):
    poll = meta.ForeignKey(Poll, edit_inline=meta.TABULAR,
        num_in_admin=10, min_num_in_admin=5)
    choice = meta.CharField(maxlength=255, core=True)
    votes = meta.IntegerField(editable=False, default=0)

    def __repr__(self):
        return self.choice

现在我要按poll的pub_date的顺序取出所有的choice,文档上说

 "To order by a field in a different table, add the other table's name and a
dot, like so:

choices.get_list(order_by=('polls.pub_date', 'choice'))

"

我按照文档所给的方式执行,提示找不到column:polls.pub_date

请高人指点.谢谢



-- 
devdoer
devdoer at gmail.com
http://project.mytianwang.cn/cgi-bin/blog
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