mirror of
https://github.com/django/django.git
synced 2024-12-24 10:05:46 +00:00
54ea290e5b
Changed __eq__ to return NotImplemented instead of False if compared to an object of the same type, as is recommended by the Python data model reference. Now these models can be compared to ANY (or other objects with __eq__ overwritten) without returning False automatically.
332 lines
13 KiB
Python
332 lines
13 KiB
Python
import datetime
|
|
from unittest import mock
|
|
|
|
from django.db import connection, transaction
|
|
from django.db.models import F, Func, Q
|
|
from django.db.models.constraints import CheckConstraint
|
|
from django.db.utils import IntegrityError
|
|
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))
|