I have three models: Person, Client, Member
Person is a base model, Client and Member are profiles for Person.
class Person(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(
verbose_name=_('email address'),
max_length=255,
unique=True,
)
class Client(User): #or maybe models.Model and explicit OneToField
first_name = models.CharField(verbose_name=_('first name'),
max_length=30)
last_name = models.CharField(verbose_name=_('last name'), max_length=30)
class Member(User): #or maybe models.Model and explicit OneToField
description = models.CharField(verbose_name=_('first name'),
max_length=255)
# other stuff
So, what I want?
1. In admin, when we add client or member, I want to fill field email
(fields from base class) as if it was in derived class. For example, in
admin list_display = ('email', 'first_name'). Not select boxes for user.
2. Person class can be instantiated separately and the "attached" to the
created profiel. Like person=Person(email="t...@gmail.com"), client =
Client(person=person,first_name="test"...). Especially, this should work in
forms. When user (person) is authenticated I want to give ability to fill
in profile (client) form and attach person to this form.
3. One person can have both accounts. If I delete client/member,
corresponding person should not be deleted.
3rd option actually is not necessary, but it is useful for me to know how
to do it.
So, option 1 is perfectly solved by inheritance, Person is User, but this
approach fails when option 2 is implemented. Since Person and Client is
considered as one whole, I can't attach user, duplicate key error.
Option 2 is resolved by extending models.Model and appending
person=models.OnetoOneField(Person,primary_key=True). However, admin is
broken (1st option), because Client don't have fields like email.
So, what approach to take in order to solve above issues?
Are there simple ways?
If there are no simple ways, is there advanced way, like overriding
metaclass, object descriptors or writing custom OneToOne field?
Any suggestions are welcomed.
Thank you.
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