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63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
from __future__ import absolute_import
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from django.db import transaction, IntegrityError, DatabaseError
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from django.test import TestCase
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from .models import (Counter, WithCustomPK, InheritedCounter, ProxyCounter,
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SubCounter)
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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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self.assertRaises(ValueError, 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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self.assertRaises(ValueError, 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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sid = transaction.savepoint()
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c.value = 5
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self.assertRaises(IntegrityError, c.save, force_insert=True)
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transaction.savepoint_rollback(sid)
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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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self.assertRaises(DatabaseError, 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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