113 lines
3.8 KiB
Python
113 lines
3.8 KiB
Python
# Copyright 2015 Mirantis Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Add share_export_locations table
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Revision ID: 56cdbe267881
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Revises: 17115072e1c3
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Create Date: 2015-02-27 14:06:30.464315
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"""
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# revision identifiers, used by Alembic.
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revision = '56cdbe267881'
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down_revision = '30cb96d995fa'
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy import func
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from sqlalchemy.sql import table
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def upgrade():
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export_locations_table = op.create_table(
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'share_export_locations',
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sa.Column('id', sa.Integer, primary_key=True, nullable=False),
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sa.Column('created_at', sa.DateTime),
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sa.Column('updated_at', sa.DateTime),
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sa.Column('deleted_at', sa.DateTime),
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sa.Column('deleted', sa.Integer, default=0),
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sa.Column('path', sa.String(2000)),
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sa.Column('share_id', sa.String(36),
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sa.ForeignKey('shares.id', name="sel_id_fk")),
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mysql_engine='InnoDB',
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mysql_charset='utf8')
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shares_table = table(
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'shares',
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sa.Column('created_at', sa.DateTime),
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sa.Column('deleted_at', sa.DateTime),
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sa.Column('deleted', sa.Integer),
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sa.Column('export_location', sa.String(length=255)),
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sa.Column('id', sa.String(length=36)),
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sa.Column('updated_at', sa.DateTime))
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export_locations = []
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session = sa.orm.Session(bind=op.get_bind().connect())
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for share in session.query(shares_table).all():
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deleted = share.deleted if isinstance(share.deleted, int) else 0
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export_locations.append({
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'created_at': share.created_at,
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'updated_at': share.updated_at,
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'deleted_at': share.deleted_at,
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'deleted': deleted,
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'share_id': share.id,
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'path': share.export_location,
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})
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op.bulk_insert(export_locations_table, export_locations)
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op.drop_column('shares', 'export_location')
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session.close_all()
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def downgrade():
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"""Remove share_export_locations table.
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This method can lead to data loss because only first export_location
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is saved in shares table.
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"""
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op.add_column('shares',
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sa.Column('export_location', sa.String(255)))
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export_locations_table = table(
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'share_export_locations',
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sa.Column('share_id', sa.String(length=36)),
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sa.Column('path', sa.String(length=255)),
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sa.Column('updated_at', sa.DateTime),
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sa.Column('deleted', sa.Integer))
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connection = op.get_bind()
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session = sa.orm.Session(bind=connection.connect())
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export_locations = session.query(
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func.min(export_locations_table.c.updated_at),
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export_locations_table.c.share_id,
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export_locations_table.c.path).filter(
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export_locations_table.c.deleted == 0).group_by(
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export_locations_table.c.share_id,
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export_locations_table.c.path).all()
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shares = sa.Table('shares', sa.MetaData(),
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autoload=True, autoload_with=connection)
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for location in export_locations:
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# pylint: disable=no-value-for-parameter
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update = (shares.update().where(shares.c.id == location.share_id).
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values(export_location=location.path))
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connection.execute(update)
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op.drop_table('share_export_locations')
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session.close_all()
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