87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
#
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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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#
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from alembic import op
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import sqlalchemy as sa
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"""standardattributes migration
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Revision ID: 8a6d8bdae39
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Revises: 1b294093239c
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Create Date: 2015-09-10 03:12:04.012457
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"""
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# revision identifiers, used by Alembic.
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revision = '8a6d8bdae39'
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down_revision = '1b294093239c'
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depends_on = ('32e5974ada25',)
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# basic model of the tables with required field for migration
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TABLES = ('ports', 'networks', 'subnets', 'subnetpools', 'securitygroups',
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'floatingips', 'routers', 'securitygrouprules')
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TABLE_MODELS = [
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(table, sa.Table(table, sa.MetaData(),
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sa.Column('id', sa.String(length=36), nullable=False),
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sa.Column('standard_attr_id', sa.BigInteger(),
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nullable=True)))
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for table in TABLES
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]
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standardattrs = sa.Table(
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'standardattributes', sa.MetaData(),
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sa.Column('id', sa.BigInteger(), primary_key=True, autoincrement=True),
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sa.Column('resource_type', sa.String(length=255), nullable=False))
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def upgrade():
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generate_records_for_existing()
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for table, model in TABLE_MODELS:
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# add constraint(s) now that everything is populated on that table.
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# note that some MariaDB versions will *not* allow the ALTER to
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# NOT NULL on a column that has an FK constraint, so we set NOT NULL
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# first, then the FK constraint.
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op.alter_column(table, 'standard_attr_id', nullable=False,
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existing_type=sa.BigInteger(), existing_nullable=True,
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existing_server_default=False)
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op.create_foreign_key(
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constraint_name=None, source_table=table,
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referent_table='standardattributes',
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local_cols=['standard_attr_id'], remote_cols=['id'],
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ondelete='CASCADE')
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op.create_unique_constraint(
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constraint_name='uniq_%s0standard_attr_id' % table,
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table_name=table, columns=['standard_attr_id'])
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def generate_records_for_existing():
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session = sa.orm.Session(bind=op.get_bind())
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values = []
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with session.begin(subtransactions=True):
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for table, model in TABLE_MODELS:
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for row in session.query(model):
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# NOTE(kevinbenton): without this disabled, pylint complains
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# about a missing 'dml' argument.
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#pylint: disable=no-value-for-parameter
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res = session.execute(
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standardattrs.insert().values(resource_type=table))
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session.execute(
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model.update().values(
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standard_attr_id=res.inserted_primary_key[0]).where(
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model.c.id == row[0]))
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# this commit is necessary to allow further operations
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session.commit()
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return values
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