# -*- coding: utf-8 -*-
###########################################################################
# Copyright (c), The AiiDA team. All rights reserved. #
# This file is part of the AiiDA code. #
# #
# The code is hosted on GitHub at https://github.com/aiidateam/aiida-core #
# For further information on the license, see the LICENSE.txt file #
# For further information please visit http://www.aiida.net #
###########################################################################
# pylint: disable=invalid-name
"""Add a uniqueness constraint to the uuid column of DbNode table."""
from django.db import migrations, models
from aiida.backends.djsite.db.migrations import upgrade_schema_version
from aiida.common.utils import get_new_uuid
REVISION = '1.0.14'
DOWN_REVISION = '1.0.13'
[docs]def verify_node_uuid_uniqueness(apps, schema_editor):
"""Check whether the database contains nodes with duplicate UUIDS.
Note that we have to redefine this method from aiida.manage.database.integrity.verify_node_uuid_uniqueness
because the migrations.RunPython command that will invoke this function, will pass two arguments and therefore
this wrapper needs to have a different function signature.
:raises: IntegrityError if database contains nodes with duplicate UUIDS.
"""
from aiida.manage.database.integrity.duplicate_uuid import verify_uuid_uniqueness
verify_uuid_uniqueness(table='db_dbnode')
[docs]def reverse_code(apps, schema_editor):
pass
[docs]class Migration(migrations.Migration):
"""Add a uniqueness constraint to the uuid column of DbNode table."""
dependencies = [
('db', '0013_django_1_8'),
]
operations = [
migrations.RunPython(verify_node_uuid_uniqueness, reverse_code=reverse_code),
migrations.AlterField(
model_name='dbnode',
name='uuid',
field=models.CharField(max_length=36, default=get_new_uuid, unique=True),
),
upgrade_schema_version(REVISION, DOWN_REVISION)
]