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from django.contrib.gis.db import models
from django.utils.encoding import python_2_unicode_compatible
@python_2_unicode_compatible
class Location(models.Model):
point = models.PointField()
objects = models.GeoManager()
def __str__(self): return self.point.wkt
@python_2_unicode_compatible
class City(models.Model):
name = models.CharField(max_length=50)
state = models.CharField(max_length=2)
location = models.ForeignKey(Location)
objects = models.GeoManager()
def __str__(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()
@python_2_unicode_compatible
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 __str__(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)
dob = models.DateField()
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()
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