from django.db import models class IDAlias(models.Model): old = models.CharField(max_length=255, unique=True) new = models.CharField(max_length=255) def __unicode__(self): return u"%s=%s" % (self.old, self.new) class LayerAlias(models.Model): old = models.CharField(max_length=255, unique=True) new = models.CharField(max_length=255) def __unicode__(self): return u"%s=%s" % (self.old, self.new) class Alias(models.Model): url = models.CharField(max_length=255, unique=True) target = models.CharField(max_length=255) def __unicode__(self): return u"%s=%s" % (self.url, self.target)