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69 lines
2.9 KiB
Python
69 lines
2.9 KiB
Python
from unittest import skipUnless
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from django.contrib.gis.db.models import F, GeometryField, Value, functions
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from django.contrib.gis.geos import Point, Polygon
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from django.db import connection
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from django.db.models import Count, Min
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from django.test import TestCase, skipUnlessDBFeature
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from ..utils import postgis
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from .models import City, ManyPointModel, MultiFields
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class GeoExpressionsTests(TestCase):
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fixtures = ['initial']
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def test_geometry_value_annotation(self):
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p = Point(1, 1, srid=4326)
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point = City.objects.annotate(p=Value(p, GeometryField(srid=4326))).first().p
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self.assertEqual(point, p)
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@skipUnlessDBFeature('supports_transform')
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def test_geometry_value_annotation_different_srid(self):
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p = Point(1, 1, srid=32140)
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point = City.objects.annotate(p=Value(p, GeometryField(srid=4326))).first().p
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self.assertTrue(point.equals_exact(p.transform(4326, clone=True), 10 ** -5))
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self.assertEqual(point.srid, 4326)
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@skipUnless(postgis, 'Only postgis has geography fields.')
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def test_geography_value(self):
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p = Polygon(((1, 1), (1, 2), (2, 2), (2, 1), (1, 1)))
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area = City.objects.annotate(a=functions.Area(Value(p, GeometryField(srid=4326, geography=True)))).first().a
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self.assertAlmostEqual(area.sq_km, 12305.1, 0)
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def test_update_from_other_field(self):
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p1 = Point(1, 1, srid=4326)
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p2 = Point(2, 2, srid=4326)
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obj = ManyPointModel.objects.create(
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point1=p1,
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point2=p2,
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point3=p2.transform(3857, clone=True),
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)
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# Updating a point to a point of the same SRID.
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ManyPointModel.objects.filter(pk=obj.pk).update(point2=F('point1'))
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obj.refresh_from_db()
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self.assertEqual(obj.point2, p1)
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# Updating a point to a point with a different SRID.
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if connection.features.supports_transform:
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ManyPointModel.objects.filter(pk=obj.pk).update(point3=F('point1'))
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obj.refresh_from_db()
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self.assertTrue(obj.point3.equals_exact(p1.transform(3857, clone=True), 0.1))
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def test_multiple_annotation(self):
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multi_field = MultiFields.objects.create(
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point=Point(1, 1),
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city=City.objects.get(name='Houston'),
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poly=Polygon(((1, 1), (1, 2), (2, 2), (2, 1), (1, 1))),
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)
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qs = City.objects.values('name').annotate(
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distance=Min(functions.Distance('multifields__point', multi_field.city.point)),
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).annotate(count=Count('multifields'))
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self.assertTrue(qs.first())
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@skipUnlessDBFeature('has_Translate_function')
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def test_update_with_expression(self):
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city = City.objects.create(point=Point(1, 1, srid=4326))
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City.objects.filter(pk=city.pk).update(point=functions.Translate('point', 1, 1))
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city.refresh_from_db()
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self.assertEqual(city.point, Point(2, 2, srid=4326))
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