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