text: from django.db import models
  from django.utils.translation import ugettext_lazy as _
  
  
  class Url(models.Model):
      url = models.TextField(_(u"Url"))
      short_url = models.CharField(_(u"Short URL"), max_length=50, unique=True)
      created = models.DateTimeField(_(u"Created"), auto_now_add=True)
      modified = models.DateTimeField(_(u"Modified"), auto_now=True)
  
      def __unicode__(self):
          return "{} -> {}".format(self.short_url, self.url)
  