1 from django.contrib.gis.db import models

     2 from django.contrib.gis.tests.utils import mysql

     3 

     4 # MySQL spatial indices can't handle NULL geometries.

     5 null_flag = not mysql

     6 

     7 class Country(models.Model):

     8     name = models.CharField(max_length=30)

     9     mpoly = models.MultiPolygonField() # SRID, by default, is 4326

    10     objects = models.GeoManager()

    11     def __unicode__(self): return self.name

    12 

    13 class City(models.Model):

    14     name = models.CharField(max_length=30)

    15     point = models.PointField() 

    16     objects = models.GeoManager()

    17     def __unicode__(self): return self.name

    18 

    19 class State(models.Model):

    20     name = models.CharField(max_length=30)

    21     poly = models.PolygonField(null=null_flag) # Allowing NULL geometries here.

    22     objects = models.GeoManager()

    23     def __unicode__(self): return self.name

    24 

    25 class Feature(models.Model):

    26     name = models.CharField(max_length=20)

    27     geom = models.GeometryField()

    28     objects = models.GeoManager()

    29     def __unicode__(self): return self.name

    30 

    31 class MinusOneSRID(models.Model):

    32     geom = models.PointField(srid=-1) # Minus one SRID.

    33     objects = models.GeoManager()