Non-Nested related fields

[Anonymous]

Hi there,

I have the following model:

class Sachbearbeiter(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    verein = models.ForeignKey(Verein)

    def __str__(self):
        return "{0.user.last_name}, {0.user.first_name}".format(self)

    class Meta:
        permissions = (
            ("can_read_sachbearbeiter", "Can read Sachbearbeiter"),
            ("can_add_sachbearbeiter", "Can add Sachbearbeiter"),
            ("can_change_sachbearbeiter", "Can change Sachbearbeiter"),
            ("can_delete_sachbearbeiter", "Can delete Sachbearbeiter"),
        )

and this Serializer

class SachbearbeiterSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Sachbearbeiter
        fields = ('verein',)

I need the following form of representation. It must be read-only.

{
    'pk': '1',
    'first_name': 'Peter',
    'last_name': 'Parker',
    'verein_pk': '1',
    'verein': 'My Verein',
}

Now the problem is, that I cannot simply use "fields = ('pk', 'verein', 'user.first_name', 'user.last_name', 'verein.pk', 'verein.name')" as this is not supported.

I read all of the page http://www.django-rest-framework.org/api-guide/relations/, but unless I overlooked something, all the solutions on this page are nested, which is not what I need.

Is there a way to have fields of related models flat in the serializer as mentioned before? (I am not married to the field names of the related model e.g 'verein_pk')