CODEWITHSUNDEEP
pythondjangodjango-models
GrantU
GrantU

Reputation: 6555

Django 1.5 Custom User for m2m field 'groups' clashes

Have I done this right? I have created a custom user in Django 1.5 which works. I now want to add a completely different type of user to the mix called WebUser allowing very simple access to front-end pages/ public users who have signed-up. However, every time I try I get the following error...

Try to add this:

class WebUser(AbstractEmailUser):
    company = models.CharField(max_length=100)

class Meta:
    app_label = 'accounts'

I get this:

accounts.companyuser: Accessor for m2m field 'groups' clashes with related m2m field 'Group.user_set'. Add a related_name argument to the definition for 'groups'. accounts.companyuser: Accessor for m2m field 'user_permissions' clashes with related m2m field 'Permission.user_set'. Add a related_name argument to the definition for 'user_permissions'. accounts.participantuser: Accessor for m2m field 'groups' clashes with related m2m field 'Group.user_set'. Add a related_name argument to the definition for 'groups'. accounts.participantuser: Accessor for m2m field 'user_permissions' clashes with related m2m field 'Permission.user_set'. Add a related_name argument to the definition for 'user_permissions'.

This is my full model working version before I tried to add the new user:

class EmailUserManager(BaseUserManager):

    def create_user(self, email, password=None, **extra_fields):
        """
        Creates and saves an EmailUser with the given email and password.
        """
        now = timezone.now()
        if not email:
            raise ValueError('The given email must be set')
        email = EmailUserManager.normalize_email(email)
        user = self.model(email=email, is_staff=False, is_active=True,
                          is_superuser=False, last_login=now,
                          date_joined=now, **extra_fields)

        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, email, password, **extra_fields):
        """
        Creates and saves a superuser with the given email and password.
        """
        user = self.create_user(email, password, **extra_fields)
        user.is_staff = True
        user.is_active = True
        user.is_superuser = True
        user.save(using=self._db)
        return user


class AbstractEmailUser(AbstractBaseUser, PermissionsMixin):
    """
    Abstract User with the same behaviour as Django's default User but
    without a username field. Uses email as the USERNAME_FIELD for
    authentication.

    Use this if you need to extend EmailUser.

    Inherits from both the AbstractBaseUser and PermissionMixin.

    The following attributes are inherited from the superclasses:
        * password
        * last_login
        * is_superuser
    """
    email = models.EmailField(_('email address'), max_length=255,
                              unique=True, db_index=True)
    is_staff = models.BooleanField(_('staff status'), default=False,
        help_text=_('Designates whether the user can log into this admin '
                    'site.'))
    is_active = models.BooleanField(_('active'), default=True,
        help_text=_('Designates whether this user should be treated as '
                    'active. Unselect this instead of deleting accounts.'))
    date_joined = models.DateTimeField(_('date joined'), default=timezone.now)

    objects = EmailUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    class Meta:
        abstract = True

    def get_full_name(self):
        """
        Returns the email.
        """
        return self.email

    def get_short_name(self):
        """
        Returns the email.
        """
        return self.email

    def email_user(self, subject, message, from_email=None):
        """
        Sends an email to this User.
        """
        send_mail(subject, message, from_email, [self.email])


class CompanyUser(AbstractEmailUser):
    """
    Concrete class of AbstractEmailUser.

    """

    company = models.CharField(max_length=100)

    class Meta:
        app_label = 'accounts'

Upvotes: 0

Views: 1264

Answers (1)

twil
twil

Reputation: 6162

Look at the docs for abstract base classes

If you are using the related_name attribute on a ForeignKey or ManyToManyField, you must always specify a unique reverse name for the field. This would normally cause a problem in abstract base classes, since the fields on this class are included into each of the child classes, with exactly the same values for the attributes (including related_name) each time.

And look at PermissionMixin code.

One way that I see is to replace PermissionMixin with your own class but it may break a lot more because related names will change.

Upvotes: 1

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