Django - 多列主键

发布于 2024-09-18 17:41:38 字数 935 浏览 4 评论 0原文

我想在 django 中实现多列主键。

我尝试实现一个 AutoSlugField() 来连接我的列值（外键/日期）...

models.py ：

class ProductProduction(models.Model):
    enterprise = models.ForeignKey('Enterprise')
    product = models.ForeignKey('Product')
    date = models.DateTimeField()
    count = models.IntegerField()
    slug = AutoSlugField(populate_from=
    lambda instance: instance.enterprise.username + '-' + instance.product.name + '-' + str(date))

当我传递以下参数时：

 - 'Megacorp','robot','09/10/2010',5 => slug = 'Megacorp-robot-09/10/2010'
... the next time in pass the triplet, a new value has been inserted :
 - 'Megacorp','robot','09/10/2010',10 => slug = 'Megacorp-robot-09/10/2010' 
        => same slug value => insert ????

我尝试添加 primary_key= slug 的 True 参数...但它创建了带有“-1”“-2”的新实例...并且根本没有进行任何更新...

我错过了什么吗？

谢谢，

尤安

原文

I would like to implement multicolumns primary keys in django.

I've tried to implement an AutoSlugField() which concatenate my columns values(foreignkey/dates) ...

models.py :

class ProductProduction(models.Model):
    enterprise = models.ForeignKey('Enterprise')
    product = models.ForeignKey('Product')
    date = models.DateTimeField()
    count = models.IntegerField()
    slug = AutoSlugField(populate_from=
    lambda instance: instance.enterprise.username + '-' + instance.product.name + '-' + str(date))

When I pass the following parameters :

 - 'Megacorp','robot','09/10/2010',5 => slug = 'Megacorp-robot-09/10/2010'
... the next time in pass the triplet, a new value has been inserted :
 - 'Megacorp','robot','09/10/2010',10 => slug = 'Megacorp-robot-09/10/2010' 
        => same slug value => insert ????

I tried to add primary_key=True parameter to the slug... but it creates new instance with a "-1" "-2" ... and NO update is made at all...

Did I miss something ?

Thanks,

Yoan

分享到QQ

分享到微博