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72 lines
1.5 KiB
Python
72 lines
1.5 KiB
Python
from django.contrib.gis.db import models
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from django.contrib.gis.tests.utils import mysql
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from django.utils.encoding import python_2_unicode_compatible
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# MySQL spatial indices can't handle NULL geometries.
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null_flag = not mysql
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@python_2_unicode_compatible
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class NamedModel(models.Model):
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name = models.CharField(max_length=30)
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objects = models.GeoManager()
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class Meta:
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abstract = True
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app_label = 'geoapp'
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def __str__(self):
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return self.name
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class Country(NamedModel):
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mpoly = models.MultiPolygonField() # SRID, by default, is 4326
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class City(NamedModel):
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point = models.PointField()
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# This is an inherited model from City
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class PennsylvaniaCity(City):
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county = models.CharField(max_length=30)
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founded = models.DateTimeField(null=True)
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# TODO: This should be implicitly inherited.
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objects = models.GeoManager()
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class Meta:
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app_label = 'geoapp'
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class State(NamedModel):
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poly = models.PolygonField(null=null_flag) # Allowing NULL geometries here.
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class Track(NamedModel):
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line = models.LineStringField()
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class Truth(models.Model):
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val = models.BooleanField(default=False)
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objects = models.GeoManager()
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class Meta:
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app_label = 'geoapp'
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class Feature(NamedModel):
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geom = models.GeometryField()
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class MinusOneSRID(models.Model):
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geom = models.PointField(srid=-1) # Minus one SRID.
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objects = models.GeoManager()
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class Meta:
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app_label = 'geoapp'
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