83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
# Copyright 2017 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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from neutron_lib import constants
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import sqlalchemy as sa
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from neutron.db import migration
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"""qos add direction to bw_limit_rule table
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Revision ID: 2b42d90729da
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Revises: 804a3c76314c
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Create Date: 2017-04-03 20:56:00.169599
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"""
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# revision identifiers, used by Alembic.
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revision = '2b42d90729da'
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down_revision = '804a3c76314c'
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policies_table_name = "qos_policies"
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bw_limit_table_name = "qos_bandwidth_limit_rules"
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direction_enum = sa.Enum(
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constants.EGRESS_DIRECTION, constants.INGRESS_DIRECTION,
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name="directions"
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)
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def upgrade():
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if op.get_context().bind.dialect.name == 'postgresql':
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direction_enum.create(op.get_bind(), checkfirst=True)
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with migration.remove_fks_from_table(bw_limit_table_name,
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remove_unique_constraints=True):
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op.add_column(bw_limit_table_name,
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sa.Column("direction", direction_enum,
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server_default=constants.EGRESS_DIRECTION,
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nullable=False))
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op.create_unique_constraint(
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op.f('qos_bandwidth_rules0qos_policy_id0direction'),
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bw_limit_table_name,
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['qos_policy_id', 'direction'])
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def expand_drop_exceptions():
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"""Drop and replace the QoS policy foreign key contraint
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Drop the existing QoS policy foreign key uniq constraint and then replace
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it with new unique constraint for pair (policy_id, direction).
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As names of constraints are different in MySQL and PGSQL there is need to
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add both variants to drop exceptions.
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"""
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# TODO(slaweq): replace hardcoded constaints names with names get directly
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# from database model after bug
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# https://bugs.launchpad.net/neutron/+bug/1685352 will be closed
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return {
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sa.ForeignKeyConstraint: [
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"qos_bandwidth_limit_rules_ibfk_1", # MySQL name
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"qos_bandwidth_limit_rules_qos_policy_id_fkey" # PGSQL name
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],
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sa.UniqueConstraint: [
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"qos_policy_id", # MySQL name
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"qos_bandwidth_limit_rules_qos_policy_id_key" # PGSQL name
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]
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}
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