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- from django.contrib.gis.db import models
- from django.utils.encoding import python_2_unicode_compatible
- class SimpleModel(models.Model):
- objects = models.GeoManager()
- class Meta:
- abstract = True
- app_label = 'relatedapp'
- @python_2_unicode_compatible
- class Location(SimpleModel):
- point = models.PointField()
- def __str__(self):
- return self.point.wkt
- @python_2_unicode_compatible
- class City(SimpleModel):
- name = models.CharField(max_length=50)
- state = models.CharField(max_length=2)
- location = models.ForeignKey(Location)
- def __str__(self):
- return self.name
- class AugmentedLocation(Location):
- extra_text = models.TextField(blank=True)
- objects = models.GeoManager()
- class Meta:
- app_label = 'relatedapp'
- class DirectoryEntry(SimpleModel):
- listing_text = models.CharField(max_length=50)
- location = models.ForeignKey(AugmentedLocation)
- @python_2_unicode_compatible
- class Parcel(SimpleModel):
- 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)
- def __str__(self):
- return self.name
- # These use the GeoManager but do not have any geographic fields.
- class Author(SimpleModel):
- name = models.CharField(max_length=100)
- dob = models.DateField()
- class Article(SimpleModel):
- title = models.CharField(max_length=100)
- author = models.ForeignKey(Author, unique=True)
- class Book(SimpleModel):
- title = models.CharField(max_length=100)
- author = models.ForeignKey(Author, related_name='books', null=True)
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