Re: Help with customizing Django authentication

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Hello Carlos,

On 05/29/2015 03:19 PM, Carlos Ribas wrote:
> Hello,
>
> I have to confess that I did not understand your suggestion. How this
> will help me to reverse the logic of my system? I mean, instead of User
> with or without a profile (the Person class, in my case), I want a
> Person with or without a User.
>
> Thanks anyway
>
> Em quarta-feira, 27 de maio de 2015 12:54:59 UTC-3, Carlos Ribas escreveu:
>
> Hello All,
>
> I am currently extending the existing User model to store additional
> information. So, basically I have:
>
> # models.py
> class Person(models.Model):
> user = models.OneToOneField(User, verbose_name=_('User'))
> zipcode = models.CharField(_('Zip Code'), max_length=9,
> blank=True, null=True)
> street = models.CharField(_('Address'), max_length=255,
> blank=True, null=True)
> ...
>
> #admin.py
> class PersonAdmin(admin.StackedInline):
> model = Person
> ...
>
> class UserAdmin(UserAdmin):
> inlines = (PersonAdmin, )
> ...
>
> admin.site.unregister(User)
> admin.site.register(User, UserAdmin)
>
>
> The problem is that my system should be able to register a new
> person, but this person may not need an account on the system (I
> just need to have his/her information). Right now, I can not create
> a person without an account. Besides that, first_name and last_name
> fields are not in the person class.
>
> I am wondering what is the best solution for my case. Probably, I
> will need to move the first_name and last_name fields to the Person
> class, and to do that, I will have to create custom users, is that
> right?

Yes, the best solution for your case (and for all Django projects) is to
use a custom User model.

In order to have every User linked to a Person, but not all Persons
linked to Users, you need to place the OneToOneField on the User model
pointing to Person, rather than the other way around. And in order to do
that, you need to have control over the User model.

(You _could_ sort of do it without a custom User model by having a
ManyToMany relationship between User and Person, but that allows a wide
variety of situations you don't want to allow.)

> If that is the case, may I just copy and paste the lines shown here
> (https://github.com/django/django/blob/master/django/contrib/auth/models.py
> <https://github.com/django/django/blob/master/django/contrib/auth/models.py>)
> and remove the lines about first_name and last_name?

No, you should follow the documentation on custom User models.

You'll want to inherit from AbstractBaseUser instead of AbstractUser, so
as to not have first_name and last_name fields. You'll need to add the
PermissionsMixin and probably a few other fields (including a username
field). The docs should explain what you need to know.

Carl

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