Team.py

class Team(models.Model):
    """
    This model should be thought of as an Access Window, because
    it is easier to understand what is actually going on.
    """

    # Fields
    name = models.CharField(_('Name'), max_length=100, blank=False)
    address_1 = models.CharField(_('Address 1'), max_length=100,  blank=False)
    address_2 = models.CharField(_('Address 2'), max_length=100, blank=True)
    zipcode = models.CharField(_('ZIP code'), max_length=5, blank=False)
    city = models.CharField(_('City'), max_length=100, blank=False)
    state = models.CharField(_('State'), max_length=2, blank=False)
    logo = models.URLField(_('Company Logo'), blank=True, default='')
    phone_regex = RegexValidator(regex=r'^\+?1?\d{9,15}$',
                                 message="Phone number must be entered in the format: '+999999999'. Up to 15 digits allowed.",)
    phone = models.CharField(max_length=15, validators=[phone_regex], blank=False)

    # Relationships
    user = models.ManyToManyField(CustomUser, related_name='teams')

    def __str__(self):
        return "%s - %s - %s" % (self.name, self.city, self.state)

    class Meta:
        app_label = 'api'