77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
# Copyright 2016 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 collections import defaultdict
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from alembic import op
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import sqlalchemy as sa
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"""Add binding index to RouterL3AgentBinding
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Revision ID: 2e0d7a8a1586
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Revises: 97c25b0d2353
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Create Date: 2016-09-01 14:01:57.263289
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"""
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# revision identifiers, used by Alembic.
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revision = '2e0d7a8a1586'
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down_revision = '97c25b0d2353'
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ROUTER_L3_AGENT_BINDING = 'routerl3agentbindings'
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def contract_creation_exceptions():
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"""Add a new binding_index to ensure that no over-creation of the bindings
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is possible.
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"""
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return {
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sa.Column: ['%s.binding_index' % ROUTER_L3_AGENT_BINDING]
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}
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def upgrade():
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op.add_column(ROUTER_L3_AGENT_BINDING,
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sa.Column('binding_index', sa.Integer(), nullable=False,
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server_default='1'))
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bindings_table = sa.Table(
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ROUTER_L3_AGENT_BINDING,
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sa.MetaData(),
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sa.Column('router_id', sa.String(36)),
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sa.Column('l3_agent_id', sa.String(36)),
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sa.Column('binding_index', sa.Integer,
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nullable=False, server_default='1'),
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)
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routers_to_bindings = defaultdict(list)
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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 result in session.query(bindings_table):
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routers_to_bindings[result.router_id].append(result)
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for bindings in routers_to_bindings.values():
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for index, result in enumerate(bindings):
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session.execute(bindings_table.update().values(
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binding_index=index + 1).where(
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bindings_table.c.router_id == result.router_id).where(
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bindings_table.c.l3_agent_id == result.l3_agent_id))
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session.commit()
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op.create_unique_constraint(
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'uniq_router_l3_agent_binding0router_id0binding_index0',
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ROUTER_L3_AGENT_BINDING, ['router_id', 'binding_index'])
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