class Category(models.Model): catid = models.CharField(max_length=50) #这里不设置主键 bigcate = models.CharField(max_length=50) #这里不设置主键 ......... class Meta: db_table = ‘my_category‘ unique_together = ("catid", "bigcate") #这是重点
django 复合主键(composit primary key)
原文：http://www.cnblogs.com/jaxthon/p/4414977.html