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Fixed #29767 -- Made date-related casts work on SQLite

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Thanks Rémy Hubscher for the report and Tim Graham and Simon Charette for the reviews.
This commit is contained in:
Claude Paroz 2018-09-18 13:59:10 +02:00
parent 0b3b7c4b0a
commit fc3a463048
4 changed files with 58 additions and 2 deletions
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41
tests/db_functions/comparison/test_cast.py
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@ -10,7 +10,7 @@ from django.test import (
TestCase, ignore_warnings, override_settings, skipUnlessDBFeature,
)
from ..models import Author
from ..models import Author, DTModel, Fan
class CastTests(TestCase):
@ -51,6 +51,40 @@ class CastTests(TestCase):
numbers = Author.objects.annotate(cast_int=Cast('alias', field_class()))
self.assertEqual(numbers.get().cast_int, 1)
def test_cast_from_db_datetime_to_date(self):
dt_value = datetime.datetime(2018, 9, 28, 12, 42, 10, 234567)
DTModel.objects.create(start_datetime=dt_value)
dtm = DTModel.objects.annotate(
start_datetime_as_date=Cast('start_datetime', models.DateField())
).first()
self.assertEqual(dtm.start_datetime_as_date, datetime.date(2018, 9, 28))
def test_cast_from_db_datetime_to_time(self):
dt_value = datetime.datetime(2018, 9, 28, 12, 42, 10, 234567)
DTModel.objects.create(start_datetime=dt_value)
dtm = DTModel.objects.annotate(
start_datetime_as_time=Cast('start_datetime', models.TimeField())
).first()
rounded_ms = int(round(.234567, connection.features.time_cast_precision) * 10**6)
self.assertEqual(dtm.start_datetime_as_time, datetime.time(12, 42, 10, rounded_ms))
def test_cast_from_db_date_to_datetime(self):
dt_value = datetime.date(2018, 9, 28)
DTModel.objects.create(start_date=dt_value)
dtm = DTModel.objects.annotate(start_as_datetime=Cast('start_date', models.DateTimeField())).first()
self.assertEqual(dtm.start_as_datetime, datetime.datetime(2018, 9, 28, 0, 0, 0, 0))
def test_cast_from_db_datetime_to_date_group_by(self):
author = Author.objects.create(name='John Smith', age=45)
dt_value = datetime.datetime(2018, 9, 28, 12, 42, 10, 234567)
Fan.objects.create(name='Margaret', age=50, author=author, fan_since=dt_value)
fans = Fan.objects.values('author').annotate(
fan_for_day=Cast('fan_since', models.DateField()),
fans=models.Count('*')
).values()
self.assertEqual(fans[0]['fan_for_day'], datetime.date(2018, 9, 28))
self.assertEqual(fans[0]['fans'], 1)
def test_cast_from_python_to_date(self):
today = datetime.date.today()
dates = Author.objects.annotate(cast_date=Cast(today, models.DateField()))
@ -59,7 +93,10 @@ class CastTests(TestCase):
def test_cast_from_python_to_datetime(self):
now = datetime.datetime.now()
dates = Author.objects.annotate(cast_datetime=Cast(now, models.DateTimeField()))
self.assertEqual(dates.get().cast_datetime, now)
time_precision = datetime.timedelta(
microseconds=10**(6 - connection.features.time_cast_precision)
)
self.assertAlmostEqual(dates.get().cast_datetime, now, delta=time_precision)
def test_cast_from_python(self):
numbers = Author.objects.annotate(cast_float=Cast(decimal.Decimal(0.125), models.FloatField()))