| from datetime import datetime, timedelta |
|
|
| from django.db import connection |
| from django.db.models import TextField |
| from django.db.models.functions import Cast, Now |
| from django.test import TestCase |
| from django.utils import timezone |
|
|
| from ..models import Article |
|
|
| lorem_ipsum = """ |
| Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod |
| tempor incididunt ut labore et dolore magna aliqua.""" |
|
|
|
|
| class NowTests(TestCase): |
| def test_basic(self): |
| a1 = Article.objects.create( |
| title="How to Django", |
| text=lorem_ipsum, |
| written=timezone.now(), |
| ) |
| a2 = Article.objects.create( |
| title="How to Time Travel", |
| text=lorem_ipsum, |
| written=timezone.now(), |
| ) |
| num_updated = Article.objects.filter(id=a1.id, published=None).update( |
| published=Now() |
| ) |
| self.assertEqual(num_updated, 1) |
| num_updated = Article.objects.filter(id=a1.id, published=None).update( |
| published=Now() |
| ) |
| self.assertEqual(num_updated, 0) |
| a1.refresh_from_db() |
| self.assertIsInstance(a1.published, datetime) |
| a2.published = Now() + timedelta(days=2) |
| a2.save() |
| a2.refresh_from_db() |
| self.assertIsInstance(a2.published, datetime) |
| self.assertQuerySetEqual( |
| Article.objects.filter(published__lte=Now()), |
| ["How to Django"], |
| lambda a: a.title, |
| ) |
| self.assertQuerySetEqual( |
| Article.objects.filter(published__gt=Now()), |
| ["How to Time Travel"], |
| lambda a: a.title, |
| ) |
|
|
| def test_microseconds(self): |
| Article.objects.create( |
| title="How to Django", |
| text=lorem_ipsum, |
| written=timezone.now(), |
| ) |
| now_string = ( |
| Article.objects.annotate(now_string=Cast(Now(), TextField())) |
| .get() |
| .now_string |
| ) |
| precision = connection.features.time_cast_precision |
| self.assertRegex(now_string, rf"^.*\.\d{{1,{precision}}}") |
|
|
