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71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
from django.db import DatabaseError, IntegrityError, transaction
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from django.test import TestCase
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from .models import (
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Counter, InheritedCounter, ProxyCounter, SubCounter, WithCustomPK,
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)
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class ForceTests(TestCase):
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def test_force_update(self):
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c = Counter.objects.create(name="one", value=1)
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# The normal case
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c.value = 2
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c.save()
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# Same thing, via an update
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c.value = 3
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c.save(force_update=True)
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# Won't work because force_update and force_insert are mutually
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# exclusive
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c.value = 4
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msg = 'Cannot force both insert and updating in model saving.'
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with self.assertRaisesMessage(ValueError, msg):
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c.save(force_insert=True, force_update=True)
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# Try to update something that doesn't have a primary key in the first
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# place.
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c1 = Counter(name="two", value=2)
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msg = 'Cannot force an update in save() with no primary key.'
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with self.assertRaisesMessage(ValueError, msg):
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with transaction.atomic():
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c1.save(force_update=True)
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c1.save(force_insert=True)
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# Won't work because we can't insert a pk of the same value.
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c.value = 5
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with self.assertRaises(IntegrityError):
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with transaction.atomic():
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c.save(force_insert=True)
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# Trying to update should still fail, even with manual primary keys, if
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# the data isn't in the database already.
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obj = WithCustomPK(name=1, value=1)
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msg = 'Forced update did not affect any rows.'
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with self.assertRaisesMessage(DatabaseError, msg):
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with transaction.atomic():
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obj.save(force_update=True)
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class InheritanceTests(TestCase):
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def test_force_update_on_inherited_model(self):
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a = InheritedCounter(name="count", value=1, tag="spam")
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a.save()
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a.save(force_update=True)
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def test_force_update_on_proxy_model(self):
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a = ProxyCounter(name="count", value=1)
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a.save()
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a.save(force_update=True)
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def test_force_update_on_inherited_model_without_fields(self):
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'''
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Issue 13864: force_update fails on subclassed models, if they don't
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specify custom fields.
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'''
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a = SubCounter(name="count", value=1)
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a.save()
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a.value = 2
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a.save(force_update=True)
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