mirror of
https://github.com/django/django.git
synced 2024-12-27 03:25:58 +00:00
30228b6459
git-svn-id: http://code.djangoproject.com/svn/django/trunk@13925 bcc190cf-cafb-0310-a4f2-bffc1f526a37
135 lines
6.2 KiB
Python
135 lines
6.2 KiB
Python
from django.test import TestCase
|
|
from regressiontests.select_related_regress.models import *
|
|
|
|
class SelectRelatedRegressTests(TestCase):
|
|
|
|
def test_regression_7110(self):
|
|
"""
|
|
Regression test for bug #7110.
|
|
|
|
When using select_related(), we must query the
|
|
Device and Building tables using two different aliases (each) in order to
|
|
differentiate the start and end Connection fields. The net result is that
|
|
both the "connections = ..." queries here should give the same results
|
|
without pulling in more than the absolute minimum number of tables
|
|
(history has shown that it's easy to make a mistake in the implementation
|
|
and include some unnecessary bonus joins).
|
|
"""
|
|
|
|
b=Building.objects.create(name='101')
|
|
dev1=Device.objects.create(name="router", building=b)
|
|
dev2=Device.objects.create(name="switch", building=b)
|
|
dev3=Device.objects.create(name="server", building=b)
|
|
port1=Port.objects.create(port_number='4',device=dev1)
|
|
port2=Port.objects.create(port_number='7',device=dev2)
|
|
port3=Port.objects.create(port_number='1',device=dev3)
|
|
c1=Connection.objects.create(start=port1, end=port2)
|
|
c2=Connection.objects.create(start=port2, end=port3)
|
|
|
|
connections=Connection.objects.filter(start__device__building=b, end__device__building=b).order_by('id')
|
|
self.assertEquals([(c.id, unicode(c.start), unicode(c.end)) for c in connections],
|
|
[(1, u'router/4', u'switch/7'), (2, u'switch/7', u'server/1')])
|
|
|
|
connections=Connection.objects.filter(start__device__building=b, end__device__building=b).select_related().order_by('id')
|
|
self.assertEquals([(c.id, unicode(c.start), unicode(c.end)) for c in connections],
|
|
[(1, u'router/4', u'switch/7'), (2, u'switch/7', u'server/1')])
|
|
|
|
# This final query should only join seven tables (port, device and building
|
|
# twice each, plus connection once).
|
|
self.assertEquals(connections.query.count_active_tables(), 7)
|
|
|
|
|
|
def test_regression_8106(self):
|
|
"""
|
|
Regression test for bug #8106.
|
|
|
|
Same sort of problem as the previous test, but this time there are
|
|
more extra tables to pull in as part of the select_related() and some
|
|
of them could potentially clash (so need to be kept separate).
|
|
"""
|
|
|
|
us = TUser.objects.create(name="std")
|
|
usp = Person.objects.create(user=us)
|
|
uo = TUser.objects.create(name="org")
|
|
uop = Person.objects.create(user=uo)
|
|
s = Student.objects.create(person = usp)
|
|
o = Organizer.objects.create(person = uop)
|
|
c = Class.objects.create(org=o)
|
|
e = Enrollment.objects.create(std=s, cls=c)
|
|
|
|
e_related = Enrollment.objects.all().select_related()[0]
|
|
self.assertEquals(e_related.std.person.user.name, u"std")
|
|
self.assertEquals(e_related.cls.org.person.user.name, u"org")
|
|
|
|
def test_regression_8036(self):
|
|
"""
|
|
Regression test for bug #8036
|
|
|
|
the first related model in the tests below
|
|
("state") is empty and we try to select the more remotely related
|
|
state__country. The regression here was not skipping the empty column results
|
|
for country before getting status.
|
|
"""
|
|
|
|
australia = Country.objects.create(name='Australia')
|
|
active = ClientStatus.objects.create(name='active')
|
|
client = Client.objects.create(name='client', status=active)
|
|
|
|
self.assertEquals(client.status, active)
|
|
self.assertEquals(Client.objects.select_related()[0].status, active)
|
|
self.assertEquals(Client.objects.select_related('state')[0].status, active)
|
|
self.assertEquals(Client.objects.select_related('state', 'status')[0].status, active)
|
|
self.assertEquals(Client.objects.select_related('state__country')[0].status, active)
|
|
self.assertEquals(Client.objects.select_related('state__country', 'status')[0].status, active)
|
|
self.assertEquals(Client.objects.select_related('status')[0].status, active)
|
|
|
|
def test_multi_table_inheritance(self):
|
|
""" Exercising select_related() with multi-table model inheritance. """
|
|
c1 = Child.objects.create(name="child1", value=42)
|
|
i1 = Item.objects.create(name="item1", child=c1)
|
|
i2 = Item.objects.create(name="item2")
|
|
|
|
self.assertQuerysetEqual(
|
|
Item.objects.select_related("child").order_by("name"),
|
|
["<Item: item1>", "<Item: item2>"]
|
|
)
|
|
|
|
def test_regression_12851(self):
|
|
"""
|
|
Regression for #12851
|
|
|
|
Deferred fields are used correctly if you select_related a subset
|
|
of fields.
|
|
"""
|
|
australia = Country.objects.create(name='Australia')
|
|
active = ClientStatus.objects.create(name='active')
|
|
|
|
wa = State.objects.create(name="Western Australia", country=australia)
|
|
c1 = Client.objects.create(name='Brian Burke', state=wa, status=active)
|
|
burke = Client.objects.select_related('state').defer('state__name').get(name='Brian Burke')
|
|
|
|
self.assertEquals(burke.name, u'Brian Burke')
|
|
self.assertEquals(burke.state.name, u'Western Australia')
|
|
|
|
# Still works if we're dealing with an inherited class
|
|
sc1 = SpecialClient.objects.create(name='Troy Buswell', state=wa, status=active, value=42)
|
|
troy = SpecialClient.objects.select_related('state').defer('state__name').get(name='Troy Buswell')
|
|
|
|
self.assertEquals(troy.name, u'Troy Buswell')
|
|
self.assertEquals(troy.value, 42)
|
|
self.assertEquals(troy.state.name, u'Western Australia')
|
|
|
|
# Still works if we defer an attribute on the inherited class
|
|
troy = SpecialClient.objects.select_related('state').defer('value', 'state__name').get(name='Troy Buswell')
|
|
|
|
self.assertEquals(troy.name, u'Troy Buswell')
|
|
self.assertEquals(troy.value, 42)
|
|
self.assertEquals(troy.state.name, u'Western Australia')
|
|
|
|
# Also works if you use only, rather than defer
|
|
troy = SpecialClient.objects.select_related('state').only('name').get(name='Troy Buswell')
|
|
|
|
self.assertEquals(troy.name, u'Troy Buswell')
|
|
self.assertEquals(troy.value, 42)
|
|
self.assertEquals(troy.state.name, u'Western Australia')
|