mirror of
https://github.com/django/django.git
synced 2024-12-26 19:16:11 +00:00
6ed7bd5609
git-svn-id: http://code.djangoproject.com/svn/django/trunk@12502 bcc190cf-cafb-0310-a4f2-bffc1f526a37
218 lines
9.6 KiB
Python
218 lines
9.6 KiB
Python
import datetime
|
|
|
|
import django.utils.copycompat as copy
|
|
|
|
from django.contrib.auth.models import User
|
|
from django.db import models
|
|
from django.db.models.query import Q
|
|
from django.utils.datastructures import SortedDict
|
|
|
|
|
|
class RevisionableModel(models.Model):
|
|
base = models.ForeignKey('self', null=True)
|
|
title = models.CharField(blank=True, max_length=255)
|
|
when = models.DateTimeField(default=datetime.datetime.now)
|
|
|
|
def __unicode__(self):
|
|
return u"%s (%s, %s)" % (self.title, self.id, self.base.id)
|
|
|
|
def save(self, *args, **kwargs):
|
|
super(RevisionableModel, self).save(*args, **kwargs)
|
|
if not self.base:
|
|
self.base = self
|
|
kwargs.pop('force_insert', None)
|
|
kwargs.pop('force_update', None)
|
|
super(RevisionableModel, self).save(*args, **kwargs)
|
|
|
|
def new_revision(self):
|
|
new_revision = copy.copy(self)
|
|
new_revision.pk = None
|
|
return new_revision
|
|
|
|
class Order(models.Model):
|
|
created_by = models.ForeignKey(User)
|
|
text = models.TextField()
|
|
|
|
class TestObject(models.Model):
|
|
first = models.CharField(max_length=20)
|
|
second = models.CharField(max_length=20)
|
|
third = models.CharField(max_length=20)
|
|
|
|
def __unicode__(self):
|
|
return u'TestObject: %s,%s,%s' % (self.first,self.second,self.third)
|
|
|
|
__test__ = {"API_TESTS": """
|
|
# Regression tests for #7314 and #7372
|
|
|
|
>>> rm = RevisionableModel.objects.create(title='First Revision', when=datetime.datetime(2008, 9, 28, 10, 30, 0))
|
|
>>> rm.pk, rm.base.pk
|
|
(1, 1)
|
|
|
|
>>> rm2 = rm.new_revision()
|
|
>>> rm2.title = "Second Revision"
|
|
>>> rm.when = datetime.datetime(2008, 9, 28, 14, 25, 0)
|
|
>>> rm2.save()
|
|
>>> print u"%s of %s" % (rm2.title, rm2.base.title)
|
|
Second Revision of First Revision
|
|
|
|
>>> rm2.pk, rm2.base.pk
|
|
(2, 1)
|
|
|
|
Queryset to match most recent revision:
|
|
>>> qs = RevisionableModel.objects.extra(where=["%(table)s.id IN (SELECT MAX(rev.id) FROM %(table)s rev GROUP BY rev.base_id)" % {'table': RevisionableModel._meta.db_table,}],)
|
|
>>> qs
|
|
[<RevisionableModel: Second Revision (2, 1)>]
|
|
|
|
Queryset to search for string in title:
|
|
>>> qs2 = RevisionableModel.objects.filter(title__contains="Revision")
|
|
>>> qs2
|
|
[<RevisionableModel: First Revision (1, 1)>, <RevisionableModel: Second Revision (2, 1)>]
|
|
|
|
Following queryset should return the most recent revision:
|
|
>>> qs & qs2
|
|
[<RevisionableModel: Second Revision (2, 1)>]
|
|
|
|
>>> u = User.objects.create_user(username="fred", password="secret", email="fred@example.com")
|
|
|
|
# General regression tests: extra select parameters should stay tied to their
|
|
# corresponding select portions. Applies when portions are updated or otherwise
|
|
# moved around.
|
|
>>> qs = User.objects.extra(select=SortedDict((("alpha", "%s"), ("beta", "2"), ("gamma", "%s"))), select_params=(1, 3))
|
|
>>> qs = qs.extra(select={"beta": 4})
|
|
>>> qs = qs.extra(select={"alpha": "%s"}, select_params=[5])
|
|
>>> result = {'alpha': 5, 'beta': 4, 'gamma': 3}
|
|
>>> list(qs.filter(id=u.id).values('alpha', 'beta', 'gamma')) == [result]
|
|
True
|
|
|
|
# Regression test for #7957: Combining extra() calls should leave the
|
|
# corresponding parameters associated with the right extra() bit. I.e. internal
|
|
# dictionary must remain sorted.
|
|
>>> User.objects.extra(select={"alpha": "%s"}, select_params=(1,)).extra(select={"beta": "%s"}, select_params=(2,))[0].alpha
|
|
1
|
|
>>> User.objects.extra(select={"beta": "%s"}, select_params=(1,)).extra(select={"alpha": "%s"}, select_params=(2,))[0].alpha
|
|
2
|
|
|
|
# Regression test for #7961: When not using a portion of an extra(...) in a
|
|
# query, remove any corresponding parameters from the query as well.
|
|
>>> list(User.objects.extra(select={"alpha": "%s"}, select_params=(-6,)).filter(id=u.id).values_list('id', flat=True)) == [u.id]
|
|
True
|
|
|
|
# Regression test for #8063: limiting a query shouldn't discard any extra()
|
|
# bits.
|
|
>>> qs = User.objects.all().extra(where=['id=%s'], params=[u.id])
|
|
>>> qs
|
|
[<User: fred>]
|
|
>>> qs[:1]
|
|
[<User: fred>]
|
|
|
|
# Regression test for #8039: Ordering sometimes removed relevant tables from
|
|
# extra(). This test is the critical case: ordering uses a table, but then
|
|
# removes the reference because of an optimisation. The table should still be
|
|
# present because of the extra() call.
|
|
>>> Order.objects.extra(where=["username=%s"], params=["fred"], tables=["auth_user"]).order_by('created_by')
|
|
[]
|
|
|
|
# Regression test for #8819: Fields in the extra(select=...) list should be
|
|
# available to extra(order_by=...).
|
|
>>> User.objects.filter(pk=u.id).extra(select={'extra_field': 1}).distinct()
|
|
[<User: fred>]
|
|
>>> User.objects.filter(pk=u.id).extra(select={'extra_field': 1}, order_by=['extra_field'])
|
|
[<User: fred>]
|
|
>>> User.objects.filter(pk=u.id).extra(select={'extra_field': 1}, order_by=['extra_field']).distinct()
|
|
[<User: fred>]
|
|
|
|
# When calling the dates() method on a queryset with extra selection columns,
|
|
# we can (and should) ignore those columns. They don't change the result and
|
|
# cause incorrect SQL to be produced otherwise.
|
|
>>> RevisionableModel.objects.extra(select={"the_answer": 'id'}).dates('when', 'month')
|
|
[datetime.datetime(2008, 9, 1, 0, 0)]
|
|
|
|
# Regression test for #10256... If there is a values() clause, Extra columns are
|
|
# only returned if they are explicitly mentioned.
|
|
>>> TestObject(first='first', second='second', third='third').save()
|
|
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values()
|
|
[{'bar': u'second', 'third': u'third', 'second': u'second', 'whiz': u'third', 'foo': u'first', 'id': 1, 'first': u'first'}]
|
|
|
|
# Extra clauses after an empty values clause are still included
|
|
>>> TestObject.objects.values().extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
|
|
[{'bar': u'second', 'third': u'third', 'second': u'second', 'whiz': u'third', 'foo': u'first', 'id': 1, 'first': u'first'}]
|
|
|
|
# Extra columns are ignored if not mentioned in the values() clause
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('first', 'second')
|
|
[{'second': u'second', 'first': u'first'}]
|
|
|
|
# Extra columns after a non-empty values() clause are ignored
|
|
>>> TestObject.objects.values('first', 'second').extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
|
|
[{'second': u'second', 'first': u'first'}]
|
|
|
|
# Extra columns can be partially returned
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('first', 'second', 'foo')
|
|
[{'second': u'second', 'foo': u'first', 'first': u'first'}]
|
|
|
|
# Also works if only extra columns are included
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values('foo', 'whiz')
|
|
[{'foo': u'first', 'whiz': u'third'}]
|
|
|
|
# Values list works the same way
|
|
# All columns are returned for an empty values_list()
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list()
|
|
[(u'first', u'second', u'third', 1, u'first', u'second', u'third')]
|
|
|
|
# Extra columns after an empty values_list() are still included
|
|
>>> TestObject.objects.values_list().extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
|
|
[(u'first', u'second', u'third', 1, u'first', u'second', u'third')]
|
|
|
|
# Extra columns ignored completely if not mentioned in values_list()
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first', 'second')
|
|
[(u'first', u'second')]
|
|
|
|
# Extra columns after a non-empty values_list() clause are ignored completely
|
|
>>> TestObject.objects.values_list('first', 'second').extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third'))))
|
|
[(u'first', u'second')]
|
|
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('second', flat=True)
|
|
[u'second']
|
|
|
|
# Only the extra columns specified in the values_list() are returned
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first', 'second', 'whiz')
|
|
[(u'first', u'second', u'third')]
|
|
|
|
# ...also works if only extra columns are included
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('foo','whiz')
|
|
[(u'first', u'third')]
|
|
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz', flat=True)
|
|
[u'third']
|
|
|
|
# ... and values are returned in the order they are specified
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz','foo')
|
|
[(u'third', u'first')]
|
|
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('first','id')
|
|
[(u'first', 1)]
|
|
|
|
>>> TestObject.objects.extra(select=SortedDict((('foo','first'),('bar','second'),('whiz','third')))).values_list('whiz', 'first', 'bar', 'id')
|
|
[(u'third', u'first', u'second', 1)]
|
|
|
|
# Regression for #10847: the list of extra columns can always be accurately evaluated.
|
|
# Using an inner query ensures that as_sql() is producing correct output
|
|
# without requiring full evaluation and execution of the inner query.
|
|
>>> TestObject.objects.extra(select={'extra': 1}).values('pk')
|
|
[{'pk': 1}]
|
|
|
|
>>> TestObject.objects.filter(pk__in=TestObject.objects.extra(select={'extra': 1}).values('pk'))
|
|
[<TestObject: TestObject: first,second,third>]
|
|
|
|
>>> TestObject.objects.values('pk').extra(select={'extra': 1})
|
|
[{'pk': 1}]
|
|
|
|
>>> TestObject.objects.filter(pk__in=TestObject.objects.values('pk').extra(select={'extra': 1}))
|
|
[<TestObject: TestObject: first,second,third>]
|
|
|
|
>>> pk = TestObject.objects.get().pk
|
|
>>> TestObject.objects.filter(pk=pk) | TestObject.objects.extra(where=["id > %s"], params=[pk])
|
|
[<TestObject: TestObject: first,second,third>]
|
|
|
|
"""}
|