import datetime import pytz from django.test import TestCase, override_settings from django.utils import timezone from .models import Article, Category, Comment class DateTimesTests(TestCase): def test_related_model_traverse(self): a1 = Article.objects.create( title="First one", pub_date=datetime.datetime(2005, 7, 28, 9, 0, 0), ) a2 = Article.objects.create( title="Another one", pub_date=datetime.datetime(2010, 7, 28, 10, 0, 0), ) a3 = Article.objects.create( title="Third one, in the first day", pub_date=datetime.datetime(2005, 7, 28, 17, 0, 0), ) a1.comments.create( text="Im the HULK!", pub_date=datetime.datetime(2005, 7, 28, 9, 30, 0), ) a1.comments.create( text="HULK SMASH!", pub_date=datetime.datetime(2005, 7, 29, 1, 30, 0), ) a2.comments.create( text="LMAO", pub_date=datetime.datetime(2010, 7, 28, 10, 10, 10), ) a3.comments.create( text="+1", pub_date=datetime.datetime(2005, 8, 29, 10, 10, 10), ) c = Category.objects.create(name="serious-news") c.articles.add(a1, a3) self.assertSequenceEqual( Comment.objects.datetimes("article__pub_date", "year"), [ datetime.datetime(2005, 1, 1), datetime.datetime(2010, 1, 1), ], ) self.assertSequenceEqual( Comment.objects.datetimes("article__pub_date", "month"), [ datetime.datetime(2005, 7, 1), datetime.datetime(2010, 7, 1), ], ) self.assertSequenceEqual( Comment.objects.datetimes("article__pub_date", "week"), [ datetime.datetime(2005, 7, 25), datetime.datetime(2010, 7, 26), ], ) self.assertSequenceEqual( Comment.objects.datetimes("article__pub_date", "day"), [ datetime.datetime(2005, 7, 28), datetime.datetime(2010, 7, 28), ], ) self.assertSequenceEqual( Article.objects.datetimes("comments__pub_date", "day"), [ datetime.datetime(2005, 7, 28), datetime.datetime(2005, 7, 29), datetime.datetime(2005, 8, 29), datetime.datetime(2010, 7, 28), ], ) self.assertQuerysetEqual( Article.objects.datetimes("comments__approval_date", "day"), [] ) self.assertSequenceEqual( Category.objects.datetimes("articles__pub_date", "day"), [ datetime.datetime(2005, 7, 28), ], ) @override_settings(USE_TZ=True) def test_21432(self): now = timezone.localtime(timezone.now().replace(microsecond=0)) Article.objects.create(title="First one", pub_date=now) qs = Article.objects.datetimes('pub_date', 'second') self.assertEqual(qs[0], now) @override_settings(USE_TZ=True, TIME_ZONE='UTC') def test_datetimes_ambiguous_and_invalid_times(self): sao = pytz.timezone('America/Sao_Paulo') utc = pytz.UTC article = Article.objects.create( title='Article 1', pub_date=utc.localize(datetime.datetime(2016, 2, 21, 1)), ) Comment.objects.create( article=article, pub_date=utc.localize(datetime.datetime(2016, 10, 16, 13)), ) with timezone.override(sao): with self.assertRaisesMessage(pytz.AmbiguousTimeError, '2016-02-20 23:00:00'): Article.objects.datetimes('pub_date', 'hour').get() with self.assertRaisesMessage(pytz.NonExistentTimeError, '2016-10-16 00:00:00'): Comment.objects.datetimes('pub_date', 'day').get() self.assertEqual( Article.objects.datetimes('pub_date', 'hour', is_dst=False).get().dst(), datetime.timedelta(0), ) self.assertEqual( Comment.objects.datetimes('pub_date', 'day', is_dst=False).get().dst(), datetime.timedelta(0), ) self.assertEqual( Article.objects.datetimes('pub_date', 'hour', is_dst=True).get().dst(), datetime.timedelta(0, 3600), ) self.assertEqual( Comment.objects.datetimes('pub_date', 'hour', is_dst=True).get().dst(), datetime.timedelta(0, 3600), ) def test_datetimes_returns_available_dates_for_given_scope_and_given_field(self): pub_dates = [ datetime.datetime(2005, 7, 28, 12, 15), datetime.datetime(2005, 7, 29, 2, 15), datetime.datetime(2005, 7, 30, 5, 15), datetime.datetime(2005, 7, 31, 19, 15)] for i, pub_date in enumerate(pub_dates): Article(pub_date=pub_date, title='title #{}'.format(i)).save() self.assertSequenceEqual( Article.objects.datetimes('pub_date', 'year'), [datetime.datetime(2005, 1, 1, 0, 0)], ) self.assertSequenceEqual( Article.objects.datetimes('pub_date', 'month'), [datetime.datetime(2005, 7, 1, 0, 0)], ) self.assertSequenceEqual( Article.objects.datetimes('pub_date', 'week'), [datetime.datetime(2005, 7, 25, 0, 0)], ) self.assertSequenceEqual(Article.objects.datetimes('pub_date', 'day'), [ datetime.datetime(2005, 7, 28, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 31, 0, 0), ]) self.assertSequenceEqual( Article.objects.datetimes('pub_date', 'day', order='ASC'), [ datetime.datetime(2005, 7, 28, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 31, 0, 0), ], ) self.assertSequenceEqual( Article.objects.datetimes('pub_date', 'day', order='DESC'), [ datetime.datetime(2005, 7, 31, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 28, 0, 0), ], ) def test_datetimes_has_lazy_iterator(self): pub_dates = [ datetime.datetime(2005, 7, 28, 12, 15), datetime.datetime(2005, 7, 29, 2, 15), datetime.datetime(2005, 7, 30, 5, 15), datetime.datetime(2005, 7, 31, 19, 15)] for i, pub_date in enumerate(pub_dates): Article(pub_date=pub_date, title='title #{}'.format(i)).save() # Use iterator() with datetimes() to return a generator that lazily # requests each result one at a time, to save memory. dates = [] with self.assertNumQueries(0): article_datetimes_iterator = Article.objects.datetimes('pub_date', 'day', order='DESC').iterator() with self.assertNumQueries(1): for article in article_datetimes_iterator: dates.append(article) self.assertEqual(dates, [ datetime.datetime(2005, 7, 31, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 28, 0, 0)]) def test_datetimes_disallows_date_fields(self): dt = datetime.datetime(2005, 7, 28, 12, 15) Article.objects.create(pub_date=dt, published_on=dt.date(), title="Don't put dates into datetime functions!") with self.assertRaisesMessage(ValueError, "Cannot truncate DateField 'published_on' to DateTimeField"): list(Article.objects.datetimes('published_on', 'second'))