Re: Models inheritance in django: how to change PK "_ptr_id" on "id"?

On Feb 7, 8:26 pm, Artyom Chernetzov <achernet...@gmail.com> wrote:
> Here is model structure: Client is User, Client can be corporate or person:
>
>     class Client(User):
>         #fields
>
>     class ClientCorporate(Client):
>         #fields
>
>     class ClientPerson(Client):
>         #fields
>
> And client can make orders:
>
>     class Order(models.Model):
>         client=models.ForeignKey(Client)
>         #fields
>
> I try to create common orders list for any type of client, here is view:
>
>     def orders_list(request):
>         client=request.user.client
>         return list_detail.object_list(request,
>             queryset = client.order_set.all(),
>             #templates ...
>             )
>
> And it leads to an error:
>
> **DatabaseError while rendering: no such column: cabinets_order.client_id**
>
> I browse db and find that all User childs have column "user_prt_id". I
> can't find way to change pk name in inherited models. But maybe there is
> some better approach?

Use OneToOneField with parent_link = True, then you can change the
name of the db field. See:
https://docs.djangoproject.com/en/dev/ref/models/fields/#onetoonefield

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