Accessor for m2m field 'groups' clashes with related m2m field 'Group.user_set'.

Hi there, I’m trying to extend the UserEmail model, and when I run the schemamigration with South, I get this:

CommandError: One or more models did not validate:
ducales_site.usuariocustomemailuser: Accessor for m2m field 'groups' clashes with related m2m field 'Group.user_set'. Add a related_name argument to the definition for 'groups'.
ducales_site.usuariocustomemailuser: 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'.
custom_user.emailuser: Accessor for m2m field 'groups' clashes with related m2m field 'Group.user_set'. Add a related_name argument to the definition for 'groups'.
custom_user.emailuser: 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'.

Here is my model:

from custom_user.models import AbstractEmailUser
class UsuarioCustomEmailUser(AbstractEmailUser):
    generos = (('M', 'Masculino'), ('F', 'Femenino'),)
    tipo_documento = (('CC', 'Cédula de Ciudadanía'), ('CE', 'Cédula de Extranjería'),)
    genero = models.CharField(blank = True, max_length = 1, choices = generos, verbose_name = u'Género')
    t_documento = models.CharField(blank = True, max_length = 2, choices = tipo_documento, verbose_name = u'Tipo de documento')
    n_documento = models.IntegerField(blank = True, max_length = 15, verbose_name = u'No. de documento')
    direccion = models.CharField(blank = True, max_length = 140, verbose_name = u'Dirección')
    ciudad = models.ForeignKey(Ciudad, blank = True, verbose_name = u'Ciudad')
    twitter = models.CharField(blank = True, max_length = 15, verbose_name = u'Twitter')
    tyc = models.BooleanField(verbose_name = u'Acepta términos y condiciones')
    recibir_sms = models.BooleanField(blank = True, verbose_name = u'Acepta recibir información en el celular')
    recibir_correo = models.BooleanField(blank = True, verbose_name = u'Acepta recibir información en el correo electrónico')

How can I add the related_name argument to solve this? Thanks in advance.

[jcugat]

Oh, I see. You need to change the setting AUTH_USER_MODEL to point to your subclassed model. From your error message, I think it should be:

AUTH_USER_MODEL = 'accounts.UserData'

Can you check if works now?

I see this is not clear enough in the docs, will update them to explain it with more detail.

[Plorenzo]

Now it’s working fine. Yes, the docs are a little bit unclear, an update will be appreciated.

Thank you