Source code for aiida.backends.djsite.db.migrations.0027_delete_trajectory_symbols_array

# -*- 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,too-few-public-methods
"""Data migration for `TrajectoryData` nodes where symbol lists are moved from repository array to attribute.

This process has to be done in two separate consecutive migrations to prevent data loss in between.
"""

# Remove when https://github.com/PyCQA/pylint/issues/1931 is fixed
# pylint: disable=no-name-in-module,import-error
from django.db import migrations

from aiida.backends.djsite.db.migrations import upgrade_schema_version
from aiida.backends.general.migrations import utils
from . import ModelModifierV0025

REVISION = '1.0.27'
DOWN_REVISION = '1.0.26'


[docs]def delete_trajectory_symbols_array(apps, _): """Delete the symbols array from all `TrajectoryData` nodes.""" DbNode = apps.get_model('db', 'DbNode') DbAttribute = apps.get_model('db', 'DbAttribute') modifier = ModelModifierV0025(apps, DbAttribute) nodes = DbNode.objects.filter(type='node.data.array.trajectory.TrajectoryData.').values_list('id', 'uuid') for pk, uuid in nodes: modifier.del_value_for_node(DbNode.objects.get(pk=pk), 'array|symbols') utils.delete_numpy_array_from_repository(uuid, 'symbols')
[docs]def create_trajectory_symbols_array(apps, _): """Create the symbols array for all `TrajectoryData` nodes.""" import numpy DbNode = apps.get_model('db', 'DbNode') DbAttribute = apps.get_model('db', 'DbAttribute') modifier = ModelModifierV0025(apps, DbAttribute) nodes = DbNode.objects.filter(type='node.data.array.trajectory.TrajectoryData.').values_list('id', 'uuid') for pk, uuid in nodes: symbols = numpy.array(modifier.get_value_for_node(pk, 'symbols')) utils.store_numpy_array_in_repository(uuid, 'symbols', symbols) modifier.set_value_for_node(DbNode.objects.get(pk=pk), 'array|symbols', list(symbols.shape))
[docs]class Migration(migrations.Migration): """Deleting duplicated information stored in TrajectoryData symbols numpy arrays""" dependencies = [ ('db', '0026_trajectory_symbols_to_attribute'), ] operations = [ migrations.RunPython(delete_trajectory_symbols_array, reverse_code=create_trajectory_symbols_array), upgrade_schema_version(REVISION, DOWN_REVISION) ]