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> primary_key=True implies blank=False, null=False and unique=True. Only one
> primary key is allowed on an object.


http://www.djangoproject.com/documentation/model_api/


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只能有一个主键（不支持联合主键），但可以有多个索引字段。
你把主键和索引给搞混了。

在 07-2-19，大郎<iexper在gmail.com> 写道：
> 在 Django的文档中看到关于主键的说明是：
>
>
> > primary_key=True implies blank=False, null=False and unique=True. Only one
> primary key is allowed on an object.
>
>
> http://www.djangoproject.com/documentation/model_api/
>
>
> 一个model只能有一个主键？这样的？
> 根据我以往的了解和经验：如果要用于排序的字段特别是数值类型的字段，设为主键能加快查询速度地。。。。
> --
> 人生若只如初见……
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°¡£¿ÕâÑù£¿¶àл¶àл£¬ºÇ~

On 2/20/07, vicalloy <zbirder在gmail.com> wrote:
>
> Ö»ÄÜÓÐÒ»¸öÖ÷¼ü£¨²»Ö§³ÖÁªºÏÖ÷¼ü£©£¬µ«¿ÉÒÔÓжà¸öË÷Òý×ֶΡ£
> Äã°ÑÖ÷¼üºÍË÷Òý¸ø¸ã»ìÁË¡£
>
> ÔÚ 07-2-19£¬´óÀÉ<iexper在gmail.com> дµÀ£º
> > ÔÚ DjangoµÄÎĵµÖп´µ½¹ØÓÚÖ÷¼üµÄ˵Ã÷ÊÇ£º
> >
> >
> > > primary_key=True implies blank=False, null=False and unique=True. Only
> one
> > primary key is allowed on an object.
> >
> >
> > http://www.djangoproject.com/documentation/model_api/
> >
> >
> > Ò»¸ömodelÖ»ÄÜÓÐÒ»¸öÖ÷¼ü£¿ÕâÑùµÄ£¿
> > ¸ù¾ÝÎÒÒÔÍùµÄÁ˽âºÍ¾­Ñ飺Èç¹ûÒªÓÃÓÚÅÅÐòµÄ×Ö¶ÎÌرðÊÇÊýÖµÀàÐ͵Ä×ֶΣ¬ÉèΪÖ÷¼üÄܼӿì²éѯËٶȵء£¡£¡£¡£
> > --
> > ÈËÉúÈôÖ»Èç³õ¼û¡­¡­
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to
> > python-chinese-request在lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request在lists.python.cn
> > Detail Info:
> > http://python.cn/mailman/listinfo/python-chinese
> >
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