RE: How to store a key to a something that can be either a person or an organization?

In my project, I have a contacts model.

I have separate models, such as Person, Institution, Supplier, or Shipper that all have a foreign key to contacts.

So it looks like you're doing it the way that I would do it.

 

From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On Behalf Of Jani Tiainen
Sent: Friday, October 20, 2017 2:24 PM
To: django-users@googlegroups.com
Subject: Re: How to store a key to a something that can be either a person or an organization?

 

I would be a bit cautious with generic foreignkeys since they don't provide database integrity checks.

 

IOW, you can break your data very easily.

 

On 20 Oct 2017, at 19.55, Ruben Alves <rubenalvesbcn@gmail.com> wrote:

 

You can use Generic Key: https://docs.djangoproject.com/en/1.11/ref/contrib/contenttypes/

 

 

Em sexta-feira, 20 de outubro de 2017 07:59:35 UTC-2, Antonis Christofides escreveu:

Hello, 

Two real examples that I've faced: 

    class MeteorologicalStation(models.Model): 
        ... 
        owner = models.ForeignKey(to a person or organization) 


    class Document(models.Model): 
        ... 
        authors = models.ManyToManyKey(to persons or organizations) 

What I do is I create a superclass that I call Lentity (short for "legal 
entity", despite the fact that it could refer to a group of people and is not 
necessary legal) and the two subclasses Person and Organization, with 
multi-table inheritance. 

But since I guess that this is a relatively common problem, I was wondering 
about what other people are doing. 

Thanks! 

Antonis 

-- 
Antonis Christofides 
http://djangodeployment.com 

 

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