Django doesn’t support multiple primary keys. unique_together just adds an
extra constraint to the table.
Since you didn’t specify a primary key, id was added for you by default.
Sent from my iPad
> On Nov 14, 2018, at 1:55 AM, 胡超 <herohu...@gmail.com> wrote:
>
>
> class QdProjectAssist(models.Model):
> '''
> 页面推荐
> '''
> # id = models.AutoField('主键', primary_key=True)
> project_id = models.ForeignKey('QdProject', verbose_name='项目',
> on_delete=models.CASCADE)
> assist_id = models.ForeignKey('QdAssist', verbose_name='正文',
> on_delete=models.CASCADE)
> sort = models.PositiveIntegerField('排序', blank=True, null=True)
> addtime = models.PositiveIntegerField('添加时间')
> uptime = models.DateTimeField('更新时间', auto_now=True)
>
> class Meta:
> managed = False
> db_table = 'qd_project_assist'
> unique_together = ('project_id', 'assist_id')
> verbose_name = '页面推荐'
> verbose_name_plural = verbose_name
>
> I export the table with two primary keys from mysql.
>
> Reporting errors in the course of use
>
> django.db.utils.InternalError: (1054, "Unknown column 'qd_project_assist.id'
> in 'field list'")
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