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 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])