from django.contrib.gis.db import models from django.contrib.localflavor.us.models import USStateField class Location(models.Model): point = models.PointField() objects = models.GeoManager() def __unicode__(self): return self.point.wkt class City(models.Model): name = models.CharField(max_length=50) state = USStateField() location = models.ForeignKey(Location) objects = models.GeoManager() def __unicode__(self): return self.name class AugmentedLocation(Location): extra_text = models.TextField(blank=True) objects = models.GeoManager() class DirectoryEntry(models.Model): listing_text = models.CharField(max_length=50) location = models.ForeignKey(AugmentedLocation) objects = models.GeoManager() class Parcel(models.Model): name = models.CharField(max_length=30) city = models.ForeignKey(City) center1 = models.PointField() # Throwing a curveball w/`db_column` here. center2 = models.PointField(srid=2276, db_column='mycenter') border1 = models.PolygonField() border2 = models.PolygonField(srid=2276) objects = models.GeoManager() def __unicode__(self): return self.name # These use the GeoManager but do not have any geographic fields. class Author(models.Model): name = models.CharField(max_length=100) objects = models.GeoManager() class Book(models.Model): title = models.CharField(max_length=100) author = models.ForeignKey(Author, related_name='books', null=True) objects = models.GeoManager()