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e57cd291cc
git-svn-id: http://code.djangoproject.com/svn/django/trunk@14423 bcc190cf-cafb-0310-a4f2-bffc1f526a37
544 lines
24 KiB
Python
544 lines
24 KiB
Python
from datetime import datetime
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from operator import attrgetter
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from django.core.exceptions import FieldError
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from django.db import connection
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from django.test import TestCase, skipUnlessDBFeature
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from models import Article
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class LookupTests(TestCase):
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#def setUp(self):
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def setUp(self):
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# Create a couple of Articles.
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self.a1 = Article(headline='Article 1', pub_date=datetime(2005, 7, 26))
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self.a1.save()
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self.a2 = Article(headline='Article 2', pub_date=datetime(2005, 7, 27))
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self.a2.save()
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self.a3 = Article(headline='Article 3', pub_date=datetime(2005, 7, 27))
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self.a3.save()
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self.a4 = Article(headline='Article 4', pub_date=datetime(2005, 7, 28))
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self.a4.save()
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self.a5 = Article(headline='Article 5', pub_date=datetime(2005, 8, 1, 9, 0))
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self.a5.save()
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self.a6 = Article(headline='Article 6', pub_date=datetime(2005, 8, 1, 8, 0))
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self.a6.save()
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self.a7 = Article(headline='Article 7', pub_date=datetime(2005, 7, 27))
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self.a7.save()
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def test_exists(self):
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# We can use .exists() to check that there are some
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self.assertTrue(Article.objects.exists())
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for a in Article.objects.all():
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a.delete()
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# There should be none now!
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self.assertFalse(Article.objects.exists())
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def test_lookup_int_as_str(self):
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# Integer value can be queried using string
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self.assertQuerysetEqual(Article.objects.filter(id__iexact=str(self.a1.id)),
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['<Article: Article 1>'])
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@skipUnlessDBFeature('supports_date_lookup_using_string')
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def test_lookup_date_as_str(self):
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# A date lookup can be performed using a string search
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self.assertQuerysetEqual(Article.objects.filter(pub_date__startswith='2005'),
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[
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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def test_iterator(self):
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# Each QuerySet gets iterator(), which is a generator that "lazily"
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# returns results using database-level iteration.
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self.assertQuerysetEqual(Article.objects.iterator(),
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[
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'Article 5',
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'Article 6',
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'Article 4',
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'Article 2',
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'Article 3',
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'Article 7',
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'Article 1',
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],
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transform=attrgetter('headline'))
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# iterator() can be used on any QuerySet.
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self.assertQuerysetEqual(
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Article.objects.filter(headline__endswith='4').iterator(),
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['Article 4'],
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transform=attrgetter('headline'))
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def test_count(self):
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# count() returns the number of objects matching search criteria.
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self.assertEqual(Article.objects.count(), 7)
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self.assertEqual(Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).count(), 3)
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self.assertEqual(Article.objects.filter(headline__startswith='Blah blah').count(), 0)
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# count() should respect sliced query sets.
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articles = Article.objects.all()
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self.assertEqual(articles.count(), 7)
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self.assertEqual(articles[:4].count(), 4)
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self.assertEqual(articles[1:100].count(), 6)
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self.assertEqual(articles[10:100].count(), 0)
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# Date and date/time lookups can also be done with strings.
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self.assertEqual(Article.objects.filter(pub_date__exact='2005-07-27 00:00:00').count(), 3)
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def test_in_bulk(self):
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# in_bulk() takes a list of IDs and returns a dictionary mapping IDs to objects.
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arts = Article.objects.in_bulk([self.a1.id, self.a2.id])
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self.assertEqual(arts[self.a1.id], self.a1)
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self.assertEqual(arts[self.a2.id], self.a2)
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self.assertEqual(Article.objects.in_bulk([self.a3.id]), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk(set([self.a3.id])), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk(frozenset([self.a3.id])), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk((self.a3.id,)), {self.a3.id: self.a3})
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self.assertEqual(Article.objects.in_bulk([1000]), {})
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self.assertEqual(Article.objects.in_bulk([]), {})
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self.assertRaises(AssertionError, Article.objects.in_bulk, 'foo')
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self.assertRaises(TypeError, Article.objects.in_bulk)
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self.assertRaises(TypeError, Article.objects.in_bulk, headline__startswith='Blah')
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def test_values(self):
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# values() returns a list of dictionaries instead of object instances --
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# and you can specify which fields you want to retrieve.
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identity = lambda x:x
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self.assertQuerysetEqual(Article.objects.values('headline'),
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[
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{'headline': u'Article 5'},
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{'headline': u'Article 6'},
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{'headline': u'Article 4'},
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{'headline': u'Article 2'},
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{'headline': u'Article 3'},
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{'headline': u'Article 7'},
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{'headline': u'Article 1'},
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],
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transform=identity)
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self.assertQuerysetEqual(
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Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).values('id'),
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[{'id': self.a2.id}, {'id': self.a3.id}, {'id': self.a7.id}],
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transform=identity)
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self.assertQuerysetEqual(Article.objects.values('id', 'headline'),
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[
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{'id': self.a5.id, 'headline': 'Article 5'},
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{'id': self.a6.id, 'headline': 'Article 6'},
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{'id': self.a4.id, 'headline': 'Article 4'},
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{'id': self.a2.id, 'headline': 'Article 2'},
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{'id': self.a3.id, 'headline': 'Article 3'},
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{'id': self.a7.id, 'headline': 'Article 7'},
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{'id': self.a1.id, 'headline': 'Article 1'},
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],
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transform=identity)
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# You can use values() with iterator() for memory savings,
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# because iterator() uses database-level iteration.
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self.assertQuerysetEqual(Article.objects.values('id', 'headline').iterator(),
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[
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{'headline': u'Article 5', 'id': self.a5.id},
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{'headline': u'Article 6', 'id': self.a6.id},
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{'headline': u'Article 4', 'id': self.a4.id},
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{'headline': u'Article 2', 'id': self.a2.id},
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{'headline': u'Article 3', 'id': self.a3.id},
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{'headline': u'Article 7', 'id': self.a7.id},
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{'headline': u'Article 1', 'id': self.a1.id},
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],
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transform=identity)
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# The values() method works with "extra" fields specified in extra(select).
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self.assertQuerysetEqual(
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Article.objects.extra(select={'id_plus_one': 'id + 1'}).values('id', 'id_plus_one'),
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[
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{'id': self.a5.id, 'id_plus_one': self.a5.id + 1},
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{'id': self.a6.id, 'id_plus_one': self.a6.id + 1},
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{'id': self.a4.id, 'id_plus_one': self.a4.id + 1},
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{'id': self.a2.id, 'id_plus_one': self.a2.id + 1},
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{'id': self.a3.id, 'id_plus_one': self.a3.id + 1},
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{'id': self.a7.id, 'id_plus_one': self.a7.id + 1},
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{'id': self.a1.id, 'id_plus_one': self.a1.id + 1},
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],
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transform=identity)
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data = {
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'id_plus_one': 'id+1',
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'id_plus_two': 'id+2',
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'id_plus_three': 'id+3',
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'id_plus_four': 'id+4',
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'id_plus_five': 'id+5',
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'id_plus_six': 'id+6',
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'id_plus_seven': 'id+7',
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'id_plus_eight': 'id+8',
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}
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self.assertQuerysetEqual(
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Article.objects.filter(id=self.a1.id).extra(select=data).values(*data.keys()),
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[{
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'id_plus_one': self.a1.id + 1,
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'id_plus_two': self.a1.id + 2,
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'id_plus_three': self.a1.id + 3,
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'id_plus_four': self.a1.id + 4,
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'id_plus_five': self.a1.id + 5,
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'id_plus_six': self.a1.id + 6,
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'id_plus_seven': self.a1.id + 7,
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'id_plus_eight': self.a1.id + 8,
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}], transform=identity)
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# However, an exception FieldDoesNotExist will be thrown if you specify
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# a non-existent field name in values() (a field that is neither in the
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# model nor in extra(select)).
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self.assertRaises(FieldError,
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Article.objects.extra(select={'id_plus_one': 'id + 1'}).values,
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'id', 'id_plus_two')
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# If you don't specify field names to values(), all are returned.
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self.assertQuerysetEqual(Article.objects.filter(id=self.a5.id).values(),
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[{
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'id': self.a5.id,
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'headline': 'Article 5',
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'pub_date': datetime(2005, 8, 1, 9, 0)
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}], transform=identity)
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def test_values_list(self):
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# values_list() is similar to values(), except that the results are
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# returned as a list of tuples, rather than a list of dictionaries.
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# Within each tuple, the order of the elemnts is the same as the order
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# of fields in the values_list() call.
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identity = lambda x:x
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self.assertQuerysetEqual(Article.objects.values_list('headline'),
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[
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(u'Article 5',),
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(u'Article 6',),
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(u'Article 4',),
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(u'Article 2',),
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(u'Article 3',),
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(u'Article 7',),
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(u'Article 1',),
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], transform=identity)
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self.assertQuerysetEqual(Article.objects.values_list('id').order_by('id'),
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[(self.a1.id,), (self.a2.id,), (self.a3.id,), (self.a4.id,), (self.a5.id,), (self.a6.id,), (self.a7.id,)],
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transform=identity)
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self.assertQuerysetEqual(
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Article.objects.values_list('id', flat=True).order_by('id'),
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[self.a1.id, self.a2.id, self.a3.id, self.a4.id, self.a5.id, self.a6.id, self.a7.id],
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transform=identity)
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self.assertQuerysetEqual(
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Article.objects.extra(select={'id_plus_one': 'id+1'})
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.order_by('id').values_list('id'),
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[(self.a1.id,), (self.a2.id,), (self.a3.id,), (self.a4.id,), (self.a5.id,), (self.a6.id,), (self.a7.id,)],
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transform=identity)
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self.assertQuerysetEqual(
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Article.objects.extra(select={'id_plus_one': 'id+1'})
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.order_by('id').values_list('id_plus_one', 'id'),
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[
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(self.a1.id+1, self.a1.id),
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(self.a2.id+1, self.a2.id),
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(self.a3.id+1, self.a3.id),
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(self.a4.id+1, self.a4.id),
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(self.a5.id+1, self.a5.id),
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(self.a6.id+1, self.a6.id),
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(self.a7.id+1, self.a7.id)
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],
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transform=identity)
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self.assertQuerysetEqual(
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Article.objects.extra(select={'id_plus_one': 'id+1'})
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.order_by('id').values_list('id', 'id_plus_one'),
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[
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(self.a1.id, self.a1.id+1),
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(self.a2.id, self.a2.id+1),
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(self.a3.id, self.a3.id+1),
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(self.a4.id, self.a4.id+1),
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(self.a5.id, self.a5.id+1),
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(self.a6.id, self.a6.id+1),
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(self.a7.id, self.a7.id+1)
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],
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transform=identity)
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self.assertRaises(TypeError, Article.objects.values_list, 'id', 'headline', flat=True)
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def test_get_next_previous_by(self):
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# Every DateField and DateTimeField creates get_next_by_FOO() and
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# get_previous_by_FOO() methods. In the case of identical date values,
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# these methods will use the ID as a fallback check. This guarantees
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# that no records are skipped or duplicated.
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self.assertEqual(repr(self.a1.get_next_by_pub_date()),
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'<Article: Article 2>')
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self.assertEqual(repr(self.a2.get_next_by_pub_date()),
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'<Article: Article 3>')
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self.assertEqual(repr(self.a2.get_next_by_pub_date(headline__endswith='6')),
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'<Article: Article 6>')
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self.assertEqual(repr(self.a3.get_next_by_pub_date()),
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'<Article: Article 7>')
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self.assertEqual(repr(self.a4.get_next_by_pub_date()),
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'<Article: Article 6>')
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self.assertRaises(Article.DoesNotExist, self.a5.get_next_by_pub_date)
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self.assertEqual(repr(self.a6.get_next_by_pub_date()),
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'<Article: Article 5>')
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self.assertEqual(repr(self.a7.get_next_by_pub_date()),
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'<Article: Article 4>')
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self.assertEqual(repr(self.a7.get_previous_by_pub_date()),
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'<Article: Article 3>')
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self.assertEqual(repr(self.a6.get_previous_by_pub_date()),
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'<Article: Article 4>')
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self.assertEqual(repr(self.a5.get_previous_by_pub_date()),
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'<Article: Article 6>')
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self.assertEqual(repr(self.a4.get_previous_by_pub_date()),
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'<Article: Article 7>')
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self.assertEqual(repr(self.a3.get_previous_by_pub_date()),
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'<Article: Article 2>')
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self.assertEqual(repr(self.a2.get_previous_by_pub_date()),
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'<Article: Article 1>')
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def test_escaping(self):
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# Underscores, percent signs and backslashes have special meaning in the
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# underlying SQL code, but Django handles the quoting of them automatically.
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a8 = Article(headline='Article_ with underscore', pub_date=datetime(2005, 11, 20))
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a8.save()
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self.assertQuerysetEqual(Article.objects.filter(headline__startswith='Article'),
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[
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'<Article: Article_ with underscore>',
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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self.assertQuerysetEqual(Article.objects.filter(headline__startswith='Article_'),
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['<Article: Article_ with underscore>'])
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a9 = Article(headline='Article% with percent sign', pub_date=datetime(2005, 11, 21))
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a9.save()
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self.assertQuerysetEqual(Article.objects.filter(headline__startswith='Article'),
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[
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'<Article: Article% with percent sign>',
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'<Article: Article_ with underscore>',
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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self.assertQuerysetEqual(Article.objects.filter(headline__startswith='Article%'),
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['<Article: Article% with percent sign>'])
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a10 = Article(headline='Article with \\ backslash', pub_date=datetime(2005, 11, 22))
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a10.save()
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self.assertQuerysetEqual(Article.objects.filter(headline__contains='\\'),
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['<Article: Article with \ backslash>'])
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def test_exclude(self):
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a8 = Article.objects.create(headline='Article_ with underscore', pub_date=datetime(2005, 11, 20))
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a9 = Article.objects.create(headline='Article% with percent sign', pub_date=datetime(2005, 11, 21))
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a10 = Article.objects.create(headline='Article with \\ backslash', pub_date=datetime(2005, 11, 22))
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# exclude() is the opposite of filter() when doing lookups:
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self.assertQuerysetEqual(
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Article.objects.filter(headline__contains='Article').exclude(headline__contains='with'),
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[
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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self.assertQuerysetEqual(Article.objects.exclude(headline__startswith="Article_"),
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[
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'<Article: Article with \\ backslash>',
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'<Article: Article% with percent sign>',
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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self.assertQuerysetEqual(Article.objects.exclude(headline="Article 7"),
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[
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'<Article: Article with \\ backslash>',
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'<Article: Article% with percent sign>',
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'<Article: Article_ with underscore>',
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 1>',
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])
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def test_none(self):
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# none() returns an EmptyQuerySet that behaves like any other QuerySet object
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self.assertQuerysetEqual(Article.objects.none(), [])
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self.assertQuerysetEqual(
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Article.objects.none().filter(headline__startswith='Article'), [])
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self.assertQuerysetEqual(
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Article.objects.filter(headline__startswith='Article').none(), [])
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self.assertEqual(Article.objects.none().count(), 0)
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self.assertEqual(
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Article.objects.none().update(headline="This should not take effect"), 0)
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self.assertQuerysetEqual(
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[article for article in Article.objects.none().iterator()],
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[])
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def test_in(self):
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# using __in with an empty list should return an empty query set
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self.assertQuerysetEqual(Article.objects.filter(id__in=[]), [])
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self.assertQuerysetEqual(Article.objects.exclude(id__in=[]),
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[
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'<Article: Article 5>',
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'<Article: Article 6>',
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'<Article: Article 4>',
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'<Article: Article 2>',
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'<Article: Article 3>',
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'<Article: Article 7>',
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'<Article: Article 1>',
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])
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def test_error_messages(self):
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# Programming errors are pointed out with nice error messages
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try:
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Article.objects.filter(pub_date_year='2005').count()
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self.fail('FieldError not raised')
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except FieldError, ex:
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|
self.assertEqual(str(ex), "Cannot resolve keyword 'pub_date_year' "
|
|
"into field. Choices are: headline, id, pub_date")
|
|
try:
|
|
Article.objects.filter(headline__starts='Article')
|
|
self.fail('FieldError not raised')
|
|
except FieldError, ex:
|
|
self.assertEqual(str(ex), "Join on field 'headline' not permitted. "
|
|
"Did you misspell 'starts' for the lookup type?")
|
|
|
|
def test_regex(self):
|
|
# Create some articles with a bit more interesting headlines for testing field lookups:
|
|
for a in Article.objects.all():
|
|
a.delete()
|
|
now = datetime.now()
|
|
a1 = Article(pub_date=now, headline='f')
|
|
a1.save()
|
|
a2 = Article(pub_date=now, headline='fo')
|
|
a2.save()
|
|
a3 = Article(pub_date=now, headline='foo')
|
|
a3.save()
|
|
a4 = Article(pub_date=now, headline='fooo')
|
|
a4.save()
|
|
a5 = Article(pub_date=now, headline='hey-Foo')
|
|
a5.save()
|
|
a6 = Article(pub_date=now, headline='bar')
|
|
a6.save()
|
|
a7 = Article(pub_date=now, headline='AbBa')
|
|
a7.save()
|
|
a8 = Article(pub_date=now, headline='baz')
|
|
a8.save()
|
|
a9 = Article(pub_date=now, headline='baxZ')
|
|
a9.save()
|
|
# zero-or-more
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'fo*'),
|
|
['<Article: f>', '<Article: fo>', '<Article: foo>', '<Article: fooo>'])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'fo*'),
|
|
[
|
|
'<Article: f>',
|
|
'<Article: fo>',
|
|
'<Article: foo>',
|
|
'<Article: fooo>',
|
|
'<Article: hey-Foo>',
|
|
])
|
|
# one-or-more
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'fo+'),
|
|
['<Article: fo>', '<Article: foo>', '<Article: fooo>'])
|
|
# wildcard
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'fooo?'),
|
|
['<Article: foo>', '<Article: fooo>'])
|
|
# leading anchor
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'^b'),
|
|
['<Article: bar>', '<Article: baxZ>', '<Article: baz>'])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'^a'),
|
|
['<Article: AbBa>'])
|
|
# trailing anchor
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'z$'),
|
|
['<Article: baz>'])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'z$'),
|
|
['<Article: baxZ>', '<Article: baz>'])
|
|
# character sets
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'ba[rz]'),
|
|
['<Article: bar>', '<Article: baz>'])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'ba.[RxZ]'),
|
|
['<Article: baxZ>'])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'ba[RxZ]'),
|
|
['<Article: bar>', '<Article: baxZ>', '<Article: baz>'])
|
|
|
|
# and more articles:
|
|
a10 = Article(pub_date=now, headline='foobar')
|
|
a10.save()
|
|
a11 = Article(pub_date=now, headline='foobaz')
|
|
a11.save()
|
|
a12 = Article(pub_date=now, headline='ooF')
|
|
a12.save()
|
|
a13 = Article(pub_date=now, headline='foobarbaz')
|
|
a13.save()
|
|
a14 = Article(pub_date=now, headline='zoocarfaz')
|
|
a14.save()
|
|
a15 = Article(pub_date=now, headline='barfoobaz')
|
|
a15.save()
|
|
a16 = Article(pub_date=now, headline='bazbaRFOO')
|
|
a16.save()
|
|
|
|
# alternation
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'oo(f|b)'),
|
|
[
|
|
'<Article: barfoobaz>',
|
|
'<Article: foobar>',
|
|
'<Article: foobarbaz>',
|
|
'<Article: foobaz>',
|
|
])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'oo(f|b)'),
|
|
[
|
|
'<Article: barfoobaz>',
|
|
'<Article: foobar>',
|
|
'<Article: foobarbaz>',
|
|
'<Article: foobaz>',
|
|
'<Article: ooF>',
|
|
])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'^foo(f|b)'),
|
|
['<Article: foobar>', '<Article: foobarbaz>', '<Article: foobaz>'])
|
|
|
|
# greedy matching
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'b.*az'),
|
|
[
|
|
'<Article: barfoobaz>',
|
|
'<Article: baz>',
|
|
'<Article: bazbaRFOO>',
|
|
'<Article: foobarbaz>',
|
|
'<Article: foobaz>',
|
|
])
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__iregex=r'b.*ar'),
|
|
[
|
|
'<Article: bar>',
|
|
'<Article: barfoobaz>',
|
|
'<Article: bazbaRFOO>',
|
|
'<Article: foobar>',
|
|
'<Article: foobarbaz>',
|
|
])
|
|
|
|
@skipUnlessDBFeature('supports_regex_backreferencing')
|
|
def test_regex_backreferencing(self):
|
|
# grouping and backreferences
|
|
now = datetime.now()
|
|
a10 = Article(pub_date=now, headline='foobar')
|
|
a10.save()
|
|
a11 = Article(pub_date=now, headline='foobaz')
|
|
a11.save()
|
|
a12 = Article(pub_date=now, headline='ooF')
|
|
a12.save()
|
|
a13 = Article(pub_date=now, headline='foobarbaz')
|
|
a13.save()
|
|
a14 = Article(pub_date=now, headline='zoocarfaz')
|
|
a14.save()
|
|
a15 = Article(pub_date=now, headline='barfoobaz')
|
|
a15.save()
|
|
a16 = Article(pub_date=now, headline='bazbaRFOO')
|
|
a16.save()
|
|
self.assertQuerysetEqual(Article.objects.filter(headline__regex=r'b(.).*b\1'),
|
|
['<Article: barfoobaz>', '<Article: bazbaRFOO>', '<Article: foobarbaz>'])
|