96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
# Copyright 2020 OpenStack Foundation
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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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#
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from alembic import op
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import sqlalchemy as sa
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"""Add standard attributes to address group
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Revision ID: 26d1e9f5c766
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Revises: a964d94b4677
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Create Date: 2020-12-02 17:38:45.331048
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"""
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# revision identifiers, used by Alembic.
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revision = '26d1e9f5c766'
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down_revision = 'a964d94b4677'
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TABLE = 'address_groups'
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TABLE_MODEL = sa.Table(TABLE, sa.MetaData(),
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sa.Column('id', sa.String(length=36), nullable=False),
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sa.Column('description', sa.String(length=255),
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nullable=True),
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sa.Column('standard_attr_id', sa.BigInteger(),
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nullable=True))
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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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sa.Column('description', sa.String(length=255), nullable=True))
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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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with session.begin(subtransactions=True):
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for row in session.query(TABLE_MODEL):
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res = session.execute(
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standardattrs.insert().values(resource_type=TABLE,
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description=row[1])
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)
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session.execute(
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TABLE_MODEL.update().values(
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standard_attr_id=res.inserted_primary_key[0]).where(
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TABLE_MODEL.c.id == row[0])
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)
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# this commit is necessary to allow further operations
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session.commit()
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def upgrade():
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op.add_column(TABLE, sa.Column('standard_attr_id', sa.BigInteger(),
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nullable=True))
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generate_records_for_existing()
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# add the constraint now that everything is populated on that table
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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.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_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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op.drop_column(TABLE, 'description')
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def expand_drop_exceptions():
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"""Drop the description column for table address_groups
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Drop the existing description column in address_groups table since
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address_groups are now associated with standard_attributes.
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"""
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return {
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sa.Column: ['%s.description' % TABLE]
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}
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