| 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 Article(models.Model): |
| title = models.CharField(max_length=100) |
| author = models.ForeignKey(Author, unique=True) |
| 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() |