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import copy
import datetime
from operator import attrgetter
from django.core.exceptions import ValidationError
from django.db import models, router
from django.db.models.sql import InsertQuery
from django.test import TestCase, skipUnlessDBFeature
from django.test.utils import isolate_apps
from django.utils.timezone import get_fixed_timezone
from .models import (
Article,
Department,
Event,
Model1,
Model2,
Model3,
NonAutoPK,
Party,
Worker,
)
class ModelTests(TestCase):
def test_model_init_too_many_args(self):
msg = "Number of args exceeds number of fields"
with self.assertRaisesMessage(IndexError, msg):
Worker(1, 2, 3, 4)
# The bug is that the following queries would raise:
# "TypeError: Related Field has invalid lookup: gte"
def test_related_gte_lookup(self):
"""
Regression test for #10153: foreign key __gte lookups.
"""
Worker.objects.filter(department__gte=0)
def test_related_lte_lookup(self):
"""
Regression test for #10153: foreign key __lte lookups.
"""
Worker.objects.filter(department__lte=0)
def test_sql_insert_compiler_return_id_attribute(self):
"""
Regression test for #14019: SQLInsertCompiler.as_sql() failure
"""
db = router.db_for_write(Party)
query = InsertQuery(Party)
query.insert_values([Party._meta.fields[0]], [], raw=False)
# this line will raise an AttributeError without the accompanying fix
query.get_compiler(using=db).as_sql()
def test_empty_choice(self):
# NOTE: Part of the regression test here is merely parsing the model
# declaration. The verbose_name, in particular, did not always work.
a = Article.objects.create(
headline="Look at me!", pub_date=datetime.datetime.now()
)
# An empty choice field should return None for the display name.
self.assertIs(a.get_status_display(), None)
# Empty strings should be returned as string
a = Article.objects.get(pk=a.pk)
self.assertEqual(a.misc_data, "")
def test_long_textfield(self):
# TextFields can hold more than 4000 characters (this was broken in
# Oracle).
a = Article.objects.create(
headline="Really, really big",
pub_date=datetime.datetime.now(),
article_text="ABCDE" * 1000,
)
a = Article.objects.get(pk=a.pk)
self.assertEqual(len(a.article_text), 5000)
def test_long_unicode_textfield(self):
# TextFields can hold more than 4000 bytes also when they are
# less than 4000 characters
a = Article.objects.create(
headline="Really, really big",
pub_date=datetime.datetime.now(),
article_text="\u05d0\u05d1\u05d2" * 1000,
)
a = Article.objects.get(pk=a.pk)
self.assertEqual(len(a.article_text), 3000)
def test_date_lookup(self):
# Regression test for #659
Party.objects.create(when=datetime.datetime(1999, 12, 31))
Party.objects.create(when=datetime.datetime(1998, 12, 31))
Party.objects.create(when=datetime.datetime(1999, 1, 1))
Party.objects.create(when=datetime.datetime(1, 3, 3))
self.assertQuerySetEqual(Party.objects.filter(when__month=2), [])
self.assertQuerySetEqual(
Party.objects.filter(when__month=1),
[datetime.date(1999, 1, 1)],
attrgetter("when"),
)
self.assertQuerySetEqual(
Party.objects.filter(when__month=12),
[
datetime.date(1999, 12, 31),
datetime.date(1998, 12, 31),
],
attrgetter("when"),
ordered=False,
)
self.assertQuerySetEqual(
Party.objects.filter(when__year=1998),
[
datetime.date(1998, 12, 31),
],
attrgetter("when"),
)
# Regression test for #8510
self.assertQuerySetEqual(
Party.objects.filter(when__day="31"),
[
datetime.date(1999, 12, 31),
datetime.date(1998, 12, 31),
],
attrgetter("when"),
ordered=False,
)
self.assertQuerySetEqual(
Party.objects.filter(when__month="12"),
[
datetime.date(1999, 12, 31),
datetime.date(1998, 12, 31),
],
attrgetter("when"),
ordered=False,
)
self.assertQuerySetEqual(
Party.objects.filter(when__year="1998"),
[
datetime.date(1998, 12, 31),
],
attrgetter("when"),
)
# Regression test for #18969
self.assertQuerySetEqual(
Party.objects.filter(when__year=1),
[
datetime.date(1, 3, 3),
],
attrgetter("when"),
)
self.assertQuerySetEqual(
Party.objects.filter(when__year="1"),
[
datetime.date(1, 3, 3),
],
attrgetter("when"),
)
def test_date_filter_null(self):
# Date filtering was failing with NULL date values in SQLite
# (regression test for #3501, among other things).
Party.objects.create(when=datetime.datetime(1999, 1, 1))
Party.objects.create()
p = Party.objects.filter(when__month=1)[0]
self.assertEqual(p.when, datetime.date(1999, 1, 1))
self.assertQuerySetEqual(
Party.objects.filter(pk=p.pk).dates("when", "month"),
[1],
attrgetter("month"),
)
def test_get_next_prev_by_field(self):
# get_next_by_FIELD() and get_previous_by_FIELD() don't crash when
# microseconds values are stored in the database.
Event.objects.create(when=datetime.datetime(2000, 1, 1, 16, 0, 0))
Event.objects.create(when=datetime.datetime(2000, 1, 1, 6, 1, 1))
Event.objects.create(when=datetime.datetime(2000, 1, 1, 13, 1, 1))
e = Event.objects.create(when=datetime.datetime(2000, 1, 1, 12, 0, 20, 24))
self.assertEqual(
e.get_next_by_when().when, datetime.datetime(2000, 1, 1, 13, 1, 1)
)
self.assertEqual(
e.get_previous_by_when().when, datetime.datetime(2000, 1, 1, 6, 1, 1)
)
def test_get_next_prev_by_field_unsaved(self):
msg = "get_next/get_previous cannot be used on unsaved objects."
with self.assertRaisesMessage(ValueError, msg):
Event().get_next_by_when()
with self.assertRaisesMessage(ValueError, msg):
Event().get_previous_by_when()
def test_primary_key_foreign_key_types(self):
# Check Department and Worker (non-default PK type)
d = Department.objects.create(id=10, name="IT")
w = Worker.objects.create(department=d, name="Full-time")
self.assertEqual(str(w), "Full-time")
@skipUnlessDBFeature("supports_timezones")
def test_timezones(self):
# Saving and updating with timezone-aware datetime Python objects.
# Regression test for #10443.
# The idea is that all these creations and saving should work without
# crashing. It's not rocket science.
dt1 = datetime.datetime(2008, 8, 31, 16, 20, tzinfo=get_fixed_timezone(600))
dt2 = datetime.datetime(2008, 8, 31, 17, 20, tzinfo=get_fixed_timezone(600))
obj = Article.objects.create(
headline="A headline", pub_date=dt1, article_text="foo"
)
obj.pub_date = dt2
obj.save()
self.assertEqual(
Article.objects.filter(headline="A headline").update(pub_date=dt1), 1
)
def test_chained_fks(self):
"""
Chained foreign keys with to_field produce incorrect query.
"""
m1 = Model1.objects.create(pkey=1000)
m2 = Model2.objects.create(model1=m1)
m3 = Model3.objects.create(model2=m2)
# this is the actual test for #18432
m3 = Model3.objects.get(model2=1000)
m3.model2
@isolate_apps("model_regress")
def test_metaclass_can_access_attribute_dict(self):
"""
Model metaclasses have access to the class attribute dict in
__init__() (#30254).
"""
class HorseBase(models.base.ModelBase):
def __init__(cls, name, bases, attrs):
super().__init__(name, bases, attrs)
cls.horns = 1 if "magic" in attrs else 0
class Horse(models.Model, metaclass=HorseBase):
name = models.CharField(max_length=255)
magic = True
self.assertEqual(Horse.horns, 1)
class ModelValidationTest(TestCase):
def test_pk_validation(self):
NonAutoPK.objects.create(name="one")
again = NonAutoPK(name="one")
with self.assertRaises(ValidationError):
again.validate_unique()
class EvaluateMethodTest(TestCase):
"""
Regression test for #13640: cannot filter by objects with 'evaluate' attr
"""
def test_model_with_evaluate_method(self):
"""
You can filter by objects that have an 'evaluate' attr
"""
dept = Department.objects.create(pk=1, name="abc")
dept.evaluate = "abc"
Worker.objects.filter(department=dept)
class ModelFieldsCacheTest(TestCase):
def test_fields_cache_reset_on_copy(self):
department1 = Department.objects.create(id=1, name="department1")
department2 = Department.objects.create(id=2, name="department2")
worker1 = Worker.objects.create(name="worker", department=department1)
worker2 = copy.copy(worker1)
self.assertEqual(worker2.department, department1)
# Changing related fields doesn't mutate the base object.
worker2.department = department2
self.assertEqual(worker2.department, department2)
self.assertEqual(worker1.department, department1)
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