class Group(models.Model):

    name = models.CharField(
        verbose_name=u'Group',
        null=False,
        default=u'Sample Group',
        max_length=64
    )

    def __unicode__(self):
        return '{0}'.format(self.name)

    class Meta(object):
        verbose_name = u'Group'
        verbose_name_plural = u'Groups'



class Contact(models.Model):

    group = models.ForeignKey(
        Group,
        verbose_name=u'Group',
    )

    name = models.CharField(
        verbose_name=u'Contact name',
        null=False,
        default=u'Def contact',
        max_length=64
    )

    number = models.CharField(
        verbose_name=u'Number',
        max_length=20
    )

    created_at = models.DateTimeField(
        auto_now_add=True,
        editable=False,
        null=True,
    )

    modified_at = models.DateTimeField(
        auto_now=True,
        blank=True,
        null=True,
    )

    def __unicode__(self):
        return '{0} {1}'.format(self.name, self.number)

    class Meta(object):
        verbose_name = u'Contact'
        verbose_name_plural = u'Contacts'