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105 lines
2.2 KiB
Python
105 lines
2.2 KiB
Python
from django.contrib.gis.db import models
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from ..utils import gisfield_may_be_null
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class NamedModel(models.Model):
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name = models.CharField(max_length=30)
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class Meta:
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abstract = True
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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 CountryWebMercator(NamedModel):
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mpoly = models.MultiPolygonField(srid=3857)
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class City(NamedModel):
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point = models.PointField()
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class Meta:
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app_label = "geoapp"
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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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class Meta:
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app_label = "geoapp"
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class State(NamedModel):
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poly = models.PolygonField(
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null=gisfield_may_be_null
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) # Allowing NULL geometries here.
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class Meta:
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app_label = "geoapp"
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class Track(NamedModel):
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line = models.LineStringField()
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class MultiFields(NamedModel):
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city = models.ForeignKey(City, models.CASCADE)
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point = models.PointField()
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poly = models.PolygonField()
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class UniqueTogetherModel(models.Model):
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city = models.CharField(max_length=30)
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point = models.PointField()
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class Meta:
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unique_together = ("city", "point")
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required_db_features = ["supports_geometry_field_unique_index"]
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class Truth(models.Model):
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val = models.BooleanField(default=False)
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class Feature(NamedModel):
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geom = models.GeometryField()
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class ThreeDimensionalFeature(NamedModel):
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geom = models.GeometryField(dim=3)
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class Meta:
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required_db_features = {"supports_3d_storage"}
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class MinusOneSRID(models.Model):
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geom = models.PointField(srid=-1) # Minus one SRID.
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class NonConcreteField(models.IntegerField):
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def db_type(self, connection):
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return None
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def get_attname_column(self):
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attname, column = super().get_attname_column()
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return attname, None
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class NonConcreteModel(NamedModel):
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non_concrete = NonConcreteField()
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point = models.PointField(geography=True)
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class ManyPointModel(NamedModel):
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point1 = models.PointField()
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point2 = models.PointField()
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point3 = models.PointField(srid=3857)
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