99 lines
4.3 KiB
Python
99 lines
4.3 KiB
Python
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import os, unittest
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from django.contrib.gis.geos import *
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from django.contrib.gis.tests.utils import no_mysql, postgis
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from django.conf import settings
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from models import City, Location
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cities = (('Aurora', 'TX', -97.516111, 33.058333),
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('Roswell', 'NM', -104.528056, 33.387222),
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('Kecksburg', 'PA', -79.460734, 40.18476),
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)
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class RelatedGeoModelTest(unittest.TestCase):
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def test01_setup(self):
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"Setting up for related model tests."
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for name, state, lon, lat in cities:
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loc = Location(point=Point(lon, lat))
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loc.save()
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c = City(name=name, state=state, location=loc)
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c.save()
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def test02_select_related(self):
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"Testing `select_related` on geographic models (see #7126)."
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qs1 = City.objects.all()
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qs2 = City.objects.select_related()
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qs3 = City.objects.select_related('location')
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for qs in (qs1, qs2, qs3):
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for ref, c in zip(cities, qs):
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nm, st, lon, lat = ref
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self.assertEqual(nm, c.name)
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self.assertEqual(st, c.state)
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self.assertEqual(Point(lon, lat), c.location.point)
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@no_mysql
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def test03_transform_related(self):
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"Testing the `transform` GeoQuerySet method on related geographic models."
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# All the transformations are to state plane coordinate systems using
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# US Survey Feet (thus a tolerance of 0 implies error w/in 1 survey foot).
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if postgis:
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tol = 3
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nqueries = 4 # +1 for `postgis_lib_version`
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else:
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tol = 0
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nqueries = 3
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def check_pnt(ref, pnt):
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self.assertAlmostEqual(ref.x, pnt.x, tol)
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self.assertAlmostEqual(ref.y, pnt.y, tol)
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self.assertEqual(ref.srid, pnt.srid)
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# Turning on debug so we can manually verify the number of SQL queries issued.
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# DISABLED: the number of queries count testing mechanism is way too brittle.
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#dbg = settings.DEBUG
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#settings.DEBUG = True
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from django.db import connection
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# Each city transformed to the SRID of their state plane coordinate system.
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transformed = (('Kecksburg', 2272, 'POINT(1490553.98959621 314792.131023984)'),
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('Roswell', 2257, 'POINT(481902.189077221 868477.766629735)'),
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('Aurora', 2276, 'POINT(2269923.2484839 7069381.28722222)'),
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)
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for name, srid, wkt in transformed:
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# Doing this implicitly sets `select_related` select the location.
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qs = list(City.objects.filter(name=name).transform(srid, field_name='location__point'))
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check_pnt(GEOSGeometry(wkt, srid), qs[0].location.point)
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#settings.DEBUG= dbg
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# Verifying the number of issued SQL queries.
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#self.assertEqual(nqueries, len(connection.queries))
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@no_mysql
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def test04_related_aggregate(self):
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"Testing the `extent` and `unionagg` GeoQuerySet aggregates on related geographic models."
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if postgis:
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# One for all locations, one that excludes Roswell.
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all_extent = (-104.528060913086, 33.0583305358887,-79.4607315063477, 40.1847610473633)
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txpa_extent = (-97.51611328125, 33.0583305358887,-79.4607315063477, 40.1847610473633)
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e1 = City.objects.extent(field_name='location__point')
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e2 = City.objects.exclude(name='Roswell').extent(field_name='location__point')
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for ref, e in [(all_extent, e1), (txpa_extent, e2)]:
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for ref_val, e_val in zip(ref, e): self.assertAlmostEqual(ref_val, e_val)
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# The second union is for a query that has something in the WHERE clause.
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ref_u1 = GEOSGeometry('MULTIPOINT(-104.528056 33.387222,-97.516111 33.058333,-79.460734 40.18476)', 4326)
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ref_u2 = GEOSGeometry('MULTIPOINT(-97.516111 33.058333,-79.460734 40.18476)', 4326)
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u1 = City.objects.unionagg(field_name='location__point')
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u2 = City.objects.exclude(name='Roswell').unionagg(field_name='location__point')
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self.assertEqual(ref_u1, u1)
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self.assertEqual(ref_u2, u2)
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# TODO: Related tests for KML, GML, and distance lookups.
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def suite():
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s = unittest.TestSuite()
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s.addTest(unittest.makeSuite(RelatedGeoModelTest))
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return s
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