and the model setup:
class Policy(models.Model):
policy_number = models.CharField(max_length=10)
class Version(models.Model):
policy = models.ForeignKey(Policy)
class Location(models.Model):
version = models.ForeignKey(Version, blank=True, null=True)
class Item(models.Model):
version = models.ForeignKey(Version)
location = models.ForeignKey(Location, blank=True, null=True)
class ItemRateCode(models.Model):
item = models.ForeignKey(Item)
class PropertyItem(models.Model):
item_rate_code = models.ForeignKey(ItemRateCode)
class Coverage(models.Model):
version = models.ForeignKey(Version)
item_rate_code = models.ForeignKey(ItemRateCode)
And to see it fail:
*tests.py*
from django.test import TestCase
from myapp.models import Policy, Version, Location, Item
from myapp.models import ItemRateCode, PropertyItem, Coverage
class DeletePolicyTests(TestCase):
def setup_models(self):
policy = Policy.objects.create(pk=1, policy_number="1234")
version = Version.objects.create(policy=policy)
location = Location.objects.create(version=version)
item1 = Item.objects.create(version=version, location=location)
item2 = Item.objects.create(version=version, location=location)
# one for each item
item_rate_code1 = ItemRateCode.objects.create(item=item1)
item_rate_code2 = ItemRateCode.objects.create(item=item2)
# one for each item_rate_code
Coverage.objects.create(version=version,
item_rate_code=item_rate_code1)
Coverage.objects.create(version=version,
item_rate_code=item_rate_code2)
# one for each item_rate_code
PropertyItem.objects.create(item_rate_code=item_rate_code1)
PropertyItem.objects.create(item_rate_code=item_rate_code2)
def test_deletes_policy_successfully(self):
self.setup_models()
policy = Policy.objects.get(pk=1)
self.assertEqual(None, policy.delete())
self.assertEqual(0, len(Policy.objects.all()))
On Wed, Apr 6, 2011 at 2:41 PM, Aaron Madison wrote:
> I'm not sure if attaching files straight through email will work or not...
> but I'll give it a go. The attached zip file is a sample project that
> re-creates the situation.
> The output is as follows:
>
> (delete_bug)amadison@dev-aaron:~/projects/delete_bug/project$ ./manage.py
> test myapp
> Creating test database for alias 'default'...
> E
> ==
> ERROR: test_deletes_policy_successfully (myapp.tests.DeletePolicyTests)
> --
> Traceback (most recent call last):
> File "/home/amadison/projects/delete_bug/project/myapp/tests.py", line
> 34, in test_deletes_policy_successfully
> self.assertEqual(None, policy.delete())
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/base.py",
> line 581, in delete
> collector.delete()
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/deletion.py",
> line 63, in decorated
> func(self, *args, **kwargs)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/deletion.py",
> line 254, in delete
> query.delete_batch(pk_list, self.using)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/sql/subqueries.py",
> line 44, in delete_batch
> self.do_query(self.model._meta.db_table, where, using=using)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/sql/subqueries.py",
> line 29, in do_query
> self.get_compiler(using).execute_sql(None)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/models/sql/compiler.py",
> line 735, in execute_sql
> cursor.execute(sql, params)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/django/db/backends/mysql/base.py",
> line 86, in execute
> return self.cursor.execute(query, args)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/MySQLdb/cursors.py",
> line 174, in execute
> self.errorhandler(self, exc, value)
> File
> "/home/amadison/projects/delete_bug/lib/python2.6/site-packages/MySQLdb/connections.py",
> line 36, in defaulterrorhandler
> raise errorclass, errorvalue
> IntegrityError: (1451, 'Cannot delete or update a parent row: a foreign key
> constraint fails (`test_delete_test`.`myapp_item`, CONSTRAINT
> `version_id_refs_id_15106961` FOREIGN KEY (`version_id`) REFERENCES
> `myapp_version` (`id`))')
>
> --
> Ran 1 test in 0.120s
>
>
>
>
> On Wed, Apr 6, 2011 at 2:06 PM, Jacob Kaplan-Moss wrote:
>
>> On Wed, Apr 6, 2011 at 11:14 AM, amadison
>> wrote:
>> > It you run the test case against django 1.3 it blows up... in django
>> > 1.2.5 it passes.
>>
>> Just a quick process point: it h
