Opened 15 months ago

Last modified 15 months ago

#22527 new Bug

FK proxy model not properly deferred in syncdb

Reported by: leftmoose Owned by: nobody
Component: Database layer (models, ORM) Version: 1.6
Severity: Normal Keywords: proxy model, constraints
Cc: timo Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

Setup:

installed_apps = (
    ...
    app1, app2, app3
)

db: postgres (to enfoce constraints)

app1.models:
from django.db import models

class Model1(models.Model):
    foreign2 = models.ForeignKey('app2.Model2')

app2.models:
from app3.models import Model3

class Model2(Model3):
    class Meta:
        proxy = True

app3.models:
from django.db import models

# Create your models here.
class Model3(models.Model):
    pass
$ ./manage.py test -v2 app1


Creating test database for alias 'default' ('test_proxy_model_bug')...
Creating tables ...
Creating table django_admin_log
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_groups
Creating table auth_user_user_permissions
Creating table auth_user
Creating table django_content_type
Creating table django_session
Creating table app1_model1
Creating table app3_model3
Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/david/dev/django_source/django/core/management/__init__.py", line 397, in execute_from_command_line
    utility.execute()
  File "/Users/david/dev/django_source/django/core/management/__init__.py", line 390, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/david/dev/django_source/django/core/management/commands/test.py", line 51, in run_from_argv
    super(Command, self).run_from_argv(argv)
  File "/Users/david/dev/django_source/django/core/management/base.py", line 240, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/david/dev/django_source/django/core/management/commands/test.py", line 72, in execute
    super(Command, self).execute(*args, **options)
  File "/Users/david/dev/django_source/django/core/management/base.py", line 283, in execute
    output = self.handle(*args, **options)
  File "/Users/david/dev/django_source/django/core/management/commands/test.py", line 89, in handle
    failures = test_runner.run_tests(test_labels)
  File "/Users/david/dev/django_source/django/test/runner.py", line 145, in run_tests
    old_config = self.setup_databases()
  File "/Users/david/dev/django_source/django/test/runner.py", line 107, in setup_databases
    return setup_databases(self.verbosity, self.interactive, **kwargs)
  File "/Users/david/dev/django_source/django/test/runner.py", line 279, in setup_databases
    verbosity, autoclobber=not interactive)
  File "/Users/david/dev/django_source/django/db/backends/creation.py", line 339, in create_test_db
    load_initial_data=False)
  File "/Users/david/dev/django_source/django/core/management/__init__.py", line 159, in call_command
    return klass.execute(*args, **defaults)
  File "/Users/david/dev/django_source/django/core/management/base.py", line 283, in execute
    output = self.handle(*args, **options)
  File "/Users/david/dev/django_source/django/core/management/base.py", line 413, in handle
    return self.handle_noargs(**options)
  File "/Users/david/dev/django_source/django/core/management/commands/syncdb.py", line 107, in handle_noargs
    cursor.execute(statement)
  File "/Users/david/dev/django_source/django/db/utils.py", line 105, in inner
    return func(*args, **kwargs)
  File "/Users/david/dev/django_source/django/db/utils.py", line 99, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Users/david/dev/django_source/django/db/utils.py", line 105, in inner
    return func(*args, **kwargs)
django.db.utils.ProgrammingError: relation "app3_model3" does not exist

git bisect reveals that this started happening in

196cc875b26f266e8f8dfd5be9daa0b8f246b9cd is the first bad commit
commit 196cc875b26f266e8f8dfd5be9daa0b8f246b9cd
Author: Tim Graham <timograham@gmail.com>
Date:   Thu Aug 1 14:09:47 2013 -0400

    [1.6.x] Fixed #17519 -- Fixed missing SQL constraints to proxy models.

    Thanks thibaultj for the report, jenh for the patch,
    and charettes for the tests.

    Backport of aa830009de from master

so i guess this may be considered an improvement :p

from some pdb digging, it looks like the issue is that once the proxy model Model2 is created (but before the concrete one Model3 is), syncdb tries to setup all deferred constraints, though in this case, the dependency is on Model3, not Model2.

Change History (1)

comment:1 Changed 15 months ago by timo

  • Cc timo added
  • Component changed from Uncategorized to Database layer (models, ORM)
  • Needs documentation unset
  • Needs tests unset
  • Patch needs improvement unset
  • Triage Stage changed from Unreviewed to Accepted
  • Type changed from Uncategorized to Bug
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