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from __future__ import unicode_literals
import datetime
from unittest import skipUnless
from django.core.exceptions import FieldError
from django.db import connection
from django.test import TestCase, override_settings
from django.utils import six
from .models import Article, Category, Comment
class DatesTests(TestCase):
def test_related_model_traverse(self):
a1 = Article.objects.create(
title="First one",
pub_date=datetime.date(2005, 7, 28),
)
a2 = Article.objects.create(
title="Another one",
pub_date=datetime.date(2010, 7, 28),
)
a3 = Article.objects.create(
title="Third one, in the first day",
pub_date=datetime.date(2005, 7, 28),
)
a1.comments.create(
text="Im the HULK!",
pub_date=datetime.date(2005, 7, 28),
)
a1.comments.create(
text="HULK SMASH!",
pub_date=datetime.date(2005, 7, 29),
)
a2.comments.create(
text="LMAO",
pub_date=datetime.date(2010, 7, 28),
)
a3.comments.create(
text="+1",
pub_date=datetime.date(2005, 8, 29),
)
c = Category.objects.create(name="serious-news")
c.articles.add(a1, a3)
self.assertQuerysetEqual(
Comment.objects.dates("article__pub_date", "year"), [
datetime.date(2005, 1, 1),
datetime.date(2010, 1, 1),
],
lambda d: d,
)
self.assertQuerysetEqual(
Comment.objects.dates("article__pub_date", "month"), [
datetime.date(2005, 7, 1),
datetime.date(2010, 7, 1),
],
lambda d: d
)
self.assertQuerysetEqual(
Comment.objects.dates("article__pub_date", "day"), [
datetime.date(2005, 7, 28),
datetime.date(2010, 7, 28),
],
lambda d: d
)
self.assertQuerysetEqual(
Article.objects.dates("comments__pub_date", "day"), [
datetime.date(2005, 7, 28),
datetime.date(2005, 7, 29),
datetime.date(2005, 8, 29),
datetime.date(2010, 7, 28),
],
lambda d: d
)
self.assertQuerysetEqual(
Article.objects.dates("comments__approval_date", "day"), []
)
self.assertQuerysetEqual(
Category.objects.dates("articles__pub_date", "day"), [
datetime.date(2005, 7, 28),
],
lambda d: d,
)
def test_dates_fails_when_no_arguments_are_provided(self):
self.assertRaises(
TypeError,
Article.objects.dates,
)
def test_dates_fails_when_given_invalid_field_argument(self):
six.assertRaisesRegex(
self,
FieldError,
"Cannot resolve keyword u?'invalid_field' into field. Choices are: "
"categories, comments, id, pub_date, pub_datetime, title",
Article.objects.dates,
"invalid_field",
"year",
)
def test_dates_fails_when_given_invalid_kind_argument(self):
six.assertRaisesRegex(
self,
AssertionError,
"'kind' must be one of 'year', 'month' or 'day'.",
Article.objects.dates,
"pub_date",
"bad_kind",
)
def test_dates_fails_when_given_invalid_order_argument(self):
six.assertRaisesRegex(
self,
AssertionError,
"'order' must be either 'ASC' or 'DESC'.",
Article.objects.dates,
"pub_date",
"year",
order="bad order",
)
@override_settings(USE_TZ=False)
def test_dates_trunc_datetime_fields(self):
Article.objects.bulk_create(
Article(pub_date=pub_datetime.date(), pub_datetime=pub_datetime)
for pub_datetime in [
datetime.datetime(2015, 10, 21, 18, 1),
datetime.datetime(2015, 10, 21, 18, 2),
datetime.datetime(2015, 10, 22, 18, 1),
datetime.datetime(2015, 10, 22, 18, 2),
]
)
self.assertQuerysetEqual(
Article.objects.dates('pub_datetime', 'day', order='ASC'), [
"datetime.date(2015, 10, 21)",
"datetime.date(2015, 10, 22)",
]
)
@skipUnless(connection.vendor == 'mysql', "Test checks MySQL query syntax")
def test_dates_avoid_datetime_cast(self):
Article.objects.create(pub_date=datetime.date(2015, 10, 21))
for kind in ['day', 'month', 'year']:
qs = Article.objects.dates('pub_date', kind)
if kind == 'day':
self.assertIn('DATE(', str(qs.query))
else:
self.assertIn(' AS DATE)', str(qs.query))
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