class CurrentAccountDefault(object):
    def set_context(self, serializer_field):
        dir(serializer_field)
        self.user = serializer_field.context['request'].user
        print('data=', serializer_field.context['request'].data)
        self.account = serializer_field.context['request'].data.get('account')

    def __call__(self):
        if self.user.role == Ur.RETAILER:
            return self.user.profile.account

        if self.user.role == Ur.NOMAD:
            if self.account is not None:
                return Account.objects.get(pk=self.account)
        else:
            return serializers.ValidationError('Pass account please')

        return None

    def __repr__(self):
        return unicode_to_repr('%s()' % self.__class__.__name__)