models.py

class Location(BaseAddress, TimeStampedModel):
    location_name = models.CharField(max_length=50, blank=False, null=False)
    default_location = models.BooleanField(default=False)

    def __unicode__(self):
        if self.location_name and self.city:
            return unicode(str(self.location_name + '-' + self.city))

    class Meta:
        verbose_name = 'Location'
        verbose_name_plural = 'Locations'
        ordering = ('-id',)