330 lines
13 KiB
Python
330 lines
13 KiB
Python
import datetime
|
|
from unittest import mock
|
|
|
|
from django.db import IntegrityError, connection, transaction
|
|
from django.db.models import CheckConstraint, F, Func, Q
|
|
from django.utils import timezone
|
|
|
|
from . import PostgreSQLTestCase
|
|
from .models import HotelReservation, RangesModel, Room
|
|
|
|
try:
|
|
from django.contrib.postgres.constraints import ExclusionConstraint
|
|
from django.contrib.postgres.fields import DateTimeRangeField, RangeBoundary, RangeOperators
|
|
|
|
from psycopg2.extras import DateRange, NumericRange
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
class SchemaTests(PostgreSQLTestCase):
|
|
def get_constraints(self, table):
|
|
"""Get the constraints on the table using a new cursor."""
|
|
with connection.cursor() as cursor:
|
|
return connection.introspection.get_constraints(cursor, table)
|
|
|
|
def test_check_constraint_range_value(self):
|
|
constraint_name = 'ints_between'
|
|
self.assertNotIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
constraint = CheckConstraint(
|
|
check=Q(ints__contained_by=NumericRange(10, 30)),
|
|
name=constraint_name,
|
|
)
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(RangesModel, constraint)
|
|
self.assertIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
RangesModel.objects.create(ints=(20, 50))
|
|
RangesModel.objects.create(ints=(10, 30))
|
|
|
|
def test_check_constraint_daterange_contains(self):
|
|
constraint_name = 'dates_contains'
|
|
self.assertNotIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
constraint = CheckConstraint(
|
|
check=Q(dates__contains=F('dates_inner')),
|
|
name=constraint_name,
|
|
)
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(RangesModel, constraint)
|
|
self.assertIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
date_1 = datetime.date(2016, 1, 1)
|
|
date_2 = datetime.date(2016, 1, 4)
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
RangesModel.objects.create(
|
|
dates=(date_1, date_2),
|
|
dates_inner=(date_1, date_2.replace(day=5)),
|
|
)
|
|
RangesModel.objects.create(
|
|
dates=(date_1, date_2),
|
|
dates_inner=(date_1, date_2),
|
|
)
|
|
|
|
def test_check_constraint_datetimerange_contains(self):
|
|
constraint_name = 'timestamps_contains'
|
|
self.assertNotIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
constraint = CheckConstraint(
|
|
check=Q(timestamps__contains=F('timestamps_inner')),
|
|
name=constraint_name,
|
|
)
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(RangesModel, constraint)
|
|
self.assertIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
datetime_1 = datetime.datetime(2016, 1, 1)
|
|
datetime_2 = datetime.datetime(2016, 1, 2, 12)
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
RangesModel.objects.create(
|
|
timestamps=(datetime_1, datetime_2),
|
|
timestamps_inner=(datetime_1, datetime_2.replace(hour=13)),
|
|
)
|
|
RangesModel.objects.create(
|
|
timestamps=(datetime_1, datetime_2),
|
|
timestamps_inner=(datetime_1, datetime_2),
|
|
)
|
|
|
|
|
|
class ExclusionConstraintTests(PostgreSQLTestCase):
|
|
def get_constraints(self, table):
|
|
"""Get the constraints on the table using a new cursor."""
|
|
with connection.cursor() as cursor:
|
|
return connection.introspection.get_constraints(cursor, table)
|
|
|
|
def test_invalid_condition(self):
|
|
msg = 'ExclusionConstraint.condition must be a Q instance.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
ExclusionConstraint(
|
|
index_type='GIST',
|
|
name='exclude_invalid_condition',
|
|
expressions=[(F('datespan'), RangeOperators.OVERLAPS)],
|
|
condition=F('invalid'),
|
|
)
|
|
|
|
def test_invalid_index_type(self):
|
|
msg = 'Exclusion constraints only support GiST or SP-GiST indexes.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
ExclusionConstraint(
|
|
index_type='gin',
|
|
name='exclude_invalid_index_type',
|
|
expressions=[(F('datespan'), RangeOperators.OVERLAPS)],
|
|
)
|
|
|
|
def test_invalid_expressions(self):
|
|
msg = 'The expressions must be a list of 2-tuples.'
|
|
for expressions in (['foo'], [('foo')], [('foo_1', 'foo_2', 'foo_3')]):
|
|
with self.subTest(expressions), self.assertRaisesMessage(ValueError, msg):
|
|
ExclusionConstraint(
|
|
index_type='GIST',
|
|
name='exclude_invalid_expressions',
|
|
expressions=expressions,
|
|
)
|
|
|
|
def test_empty_expressions(self):
|
|
msg = 'At least one expression is required to define an exclusion constraint.'
|
|
for empty_expressions in (None, []):
|
|
with self.subTest(empty_expressions), self.assertRaisesMessage(ValueError, msg):
|
|
ExclusionConstraint(
|
|
index_type='GIST',
|
|
name='exclude_empty_expressions',
|
|
expressions=empty_expressions,
|
|
)
|
|
|
|
def test_repr(self):
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[
|
|
(F('datespan'), RangeOperators.OVERLAPS),
|
|
(F('room'), RangeOperators.EQUAL),
|
|
],
|
|
)
|
|
self.assertEqual(
|
|
repr(constraint),
|
|
"<ExclusionConstraint: index_type=GIST, expressions=["
|
|
"(F(datespan), '&&'), (F(room), '=')]>",
|
|
)
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[(F('datespan'), RangeOperators.ADJACENT_TO)],
|
|
condition=Q(cancelled=False),
|
|
index_type='SPGiST',
|
|
)
|
|
self.assertEqual(
|
|
repr(constraint),
|
|
"<ExclusionConstraint: index_type=SPGiST, expressions=["
|
|
"(F(datespan), '-|-')], condition=(AND: ('cancelled', False))>",
|
|
)
|
|
|
|
def test_eq(self):
|
|
constraint_1 = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[
|
|
(F('datespan'), RangeOperators.OVERLAPS),
|
|
(F('room'), RangeOperators.EQUAL),
|
|
],
|
|
condition=Q(cancelled=False),
|
|
)
|
|
constraint_2 = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[
|
|
('datespan', RangeOperators.OVERLAPS),
|
|
('room', RangeOperators.EQUAL),
|
|
],
|
|
)
|
|
constraint_3 = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[('datespan', RangeOperators.OVERLAPS)],
|
|
condition=Q(cancelled=False),
|
|
)
|
|
self.assertEqual(constraint_1, constraint_1)
|
|
self.assertEqual(constraint_1, mock.ANY)
|
|
self.assertNotEqual(constraint_1, constraint_2)
|
|
self.assertNotEqual(constraint_1, constraint_3)
|
|
self.assertNotEqual(constraint_2, constraint_3)
|
|
self.assertNotEqual(constraint_1, object())
|
|
|
|
def test_deconstruct(self):
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
)
|
|
path, args, kwargs = constraint.deconstruct()
|
|
self.assertEqual(path, 'django.contrib.postgres.constraints.ExclusionConstraint')
|
|
self.assertEqual(args, ())
|
|
self.assertEqual(kwargs, {
|
|
'name': 'exclude_overlapping',
|
|
'expressions': [('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
})
|
|
|
|
def test_deconstruct_index_type(self):
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
index_type='SPGIST',
|
|
expressions=[('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
)
|
|
path, args, kwargs = constraint.deconstruct()
|
|
self.assertEqual(path, 'django.contrib.postgres.constraints.ExclusionConstraint')
|
|
self.assertEqual(args, ())
|
|
self.assertEqual(kwargs, {
|
|
'name': 'exclude_overlapping',
|
|
'index_type': 'SPGIST',
|
|
'expressions': [('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
})
|
|
|
|
def test_deconstruct_condition(self):
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping',
|
|
expressions=[('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
condition=Q(cancelled=False),
|
|
)
|
|
path, args, kwargs = constraint.deconstruct()
|
|
self.assertEqual(path, 'django.contrib.postgres.constraints.ExclusionConstraint')
|
|
self.assertEqual(args, ())
|
|
self.assertEqual(kwargs, {
|
|
'name': 'exclude_overlapping',
|
|
'expressions': [('datespan', RangeOperators.OVERLAPS), ('room', RangeOperators.EQUAL)],
|
|
'condition': Q(cancelled=False),
|
|
})
|
|
|
|
def _test_range_overlaps(self, constraint):
|
|
# Create exclusion constraint.
|
|
self.assertNotIn(constraint.name, self.get_constraints(HotelReservation._meta.db_table))
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(HotelReservation, constraint)
|
|
self.assertIn(constraint.name, self.get_constraints(HotelReservation._meta.db_table))
|
|
# Add initial reservations.
|
|
room101 = Room.objects.create(number=101)
|
|
room102 = Room.objects.create(number=102)
|
|
datetimes = [
|
|
timezone.datetime(2018, 6, 20),
|
|
timezone.datetime(2018, 6, 24),
|
|
timezone.datetime(2018, 6, 26),
|
|
timezone.datetime(2018, 6, 28),
|
|
timezone.datetime(2018, 6, 29),
|
|
]
|
|
HotelReservation.objects.create(
|
|
datespan=DateRange(datetimes[0].date(), datetimes[1].date()),
|
|
start=datetimes[0],
|
|
end=datetimes[1],
|
|
room=room102,
|
|
)
|
|
HotelReservation.objects.create(
|
|
datespan=DateRange(datetimes[1].date(), datetimes[3].date()),
|
|
start=datetimes[1],
|
|
end=datetimes[3],
|
|
room=room102,
|
|
)
|
|
# Overlap dates.
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
reservation = HotelReservation(
|
|
datespan=(datetimes[1].date(), datetimes[2].date()),
|
|
start=datetimes[1],
|
|
end=datetimes[2],
|
|
room=room102,
|
|
)
|
|
reservation.save()
|
|
# Valid range.
|
|
HotelReservation.objects.bulk_create([
|
|
# Other room.
|
|
HotelReservation(
|
|
datespan=(datetimes[1].date(), datetimes[2].date()),
|
|
start=datetimes[1],
|
|
end=datetimes[2],
|
|
room=room101,
|
|
),
|
|
# Cancelled reservation.
|
|
HotelReservation(
|
|
datespan=(datetimes[1].date(), datetimes[1].date()),
|
|
start=datetimes[1],
|
|
end=datetimes[2],
|
|
room=room102,
|
|
cancelled=True,
|
|
),
|
|
# Other adjacent dates.
|
|
HotelReservation(
|
|
datespan=(datetimes[3].date(), datetimes[4].date()),
|
|
start=datetimes[3],
|
|
end=datetimes[4],
|
|
room=room102,
|
|
),
|
|
])
|
|
|
|
def test_range_overlaps_custom(self):
|
|
class TsTzRange(Func):
|
|
function = 'TSTZRANGE'
|
|
output_field = DateTimeRangeField()
|
|
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping_reservations_custom',
|
|
expressions=[
|
|
(TsTzRange('start', 'end', RangeBoundary()), RangeOperators.OVERLAPS),
|
|
('room', RangeOperators.EQUAL)
|
|
],
|
|
condition=Q(cancelled=False),
|
|
)
|
|
self._test_range_overlaps(constraint)
|
|
|
|
def test_range_overlaps(self):
|
|
constraint = ExclusionConstraint(
|
|
name='exclude_overlapping_reservations',
|
|
expressions=[
|
|
(F('datespan'), RangeOperators.OVERLAPS),
|
|
('room', RangeOperators.EQUAL)
|
|
],
|
|
condition=Q(cancelled=False),
|
|
)
|
|
self._test_range_overlaps(constraint)
|
|
|
|
def test_range_adjacent(self):
|
|
constraint_name = 'ints_adjacent'
|
|
self.assertNotIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
constraint = ExclusionConstraint(
|
|
name=constraint_name,
|
|
expressions=[('ints', RangeOperators.ADJACENT_TO)],
|
|
)
|
|
with connection.schema_editor() as editor:
|
|
editor.add_constraint(RangesModel, constraint)
|
|
self.assertIn(constraint_name, self.get_constraints(RangesModel._meta.db_table))
|
|
RangesModel.objects.create(ints=(20, 50))
|
|
with self.assertRaises(IntegrityError), transaction.atomic():
|
|
RangesModel.objects.create(ints=(10, 20))
|
|
RangesModel.objects.create(ints=(10, 19))
|
|
RangesModel.objects.create(ints=(51, 60))
|