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Made NumPoints raise TypeError on MySQL when it's used on fields besides LineStringField.

This commit is contained in:
Sergey Fedoseev 2016-12-16 08:36:16 +05:00 committed by Tim Graham
parent 3215bc98fe
commit 5d28fef8f9
2 changed files with 9 additions and 5 deletions
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5
django/contrib/gis/db/models/functions.py
View File

@ -382,9 +382,10 @@ class NumPoints(GeoFunc):
output_field_class = IntegerField
arity = 1
def as_sqlite(self, compiler, connection):
def as_sql(self, compiler, connection):
if self.source_expressions[self.geom_param_pos].output_field.geom_type != 'LINESTRING':
raise TypeError("SpatiaLite NumPoints can only operate on LineString content")
if not connection.features.supports_num_points_poly:
raise TypeError('NumPoints can only operate on LineString content on this database.')
return super(NumPoints, self).as_sql(compiler, connection)

9
tests/gis_tests/geoapp/test_functions.py
View File

@ -304,11 +304,14 @@ class GISFunctionsTests(TestCase):
Track.objects.create(name='Foo', line=LineString(coords))
qs = Track.objects.annotate(num_points=functions.NumPoints('line'))
self.assertEqual(qs.first().num_points, 2)
if spatialite or mysql:
# SpatiaLite and MySQL can only count points on LineStrings
mpoly_qs = Country.objects.annotate(num_points=functions.NumPoints('mpoly'))
if not connection.features.supports_num_points_poly:
msg = 'NumPoints can only operate on LineString content on this database.'
with self.assertRaisesMessage(TypeError, msg):
list(mpoly_qs)
return
for c in Country.objects.annotate(num_points=functions.NumPoints('mpoly')):
for c in mpoly_qs:
self.assertEqual(c.mpoly.num_points, c.num_points)
if not oracle: