from django.db import models class EarthLocation(models.Model): """Represents latitude and longitude, with a label""" label = models.CharField(max_length=300, unique=True) latitude = models.DecimalField(max_digits=9, decimal_places=6) longitude = models.DecimalField(max_digits=9, decimal_places=6) date_created = models.DateTimeField(auto_now_add=True) date_last_modified = models.DateTimeField(auto_now=True) class Meta: unique_together = (("latitude", "longitude"),) def __str__(self): return self.label def google_maps_link(self): return ("http://maps.google.com/maps?ll=%s,%s&z=15" % (self.latitude, self.longitude)) default_map_link = google_maps_link def html_map_link(self): # for Admin, fixme: fix_ampersands return 'map link' % self.default_map_link() html_map_link.allow_tags = True