django/tests/gis_tests/geogapp/models.py

from django.contrib.gis.db import models


class NamedModel(models.Model):
    name = models.CharField(max_length=30)

    class Meta:
        abstract = True

    def __str__(self):
        return self.name


class City(NamedModel):
    point = models.PointField(geography=True)

    class Meta:
        app_label = "geogapp"


class CityUnique(NamedModel):
    point = models.PointField(geography=True, unique=True)

    class Meta:
        required_db_features = {
            "supports_geography",
            "supports_geometry_field_unique_index",
        }


class Zipcode(NamedModel):
    code = models.CharField(max_length=10)
    poly = models.PolygonField(geography=True)


class County(NamedModel):
    state = models.CharField(max_length=20)
    mpoly = models.MultiPolygonField(geography=True)

    class Meta:
        app_label = "geogapp"

    def __str__(self):
        return " County, ".join([self.name, self.state])