73 lines
2.4 KiB
Python
73 lines
2.4 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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"""merges primarykey and indexes
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Revision ID: a54c57ada3f5
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Revises: 1c2c61ac1f4c
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Create Date: 2016-02-04 09:09:23.180955
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"""
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from alembic import op
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# revision identifiers, used by Alembic.
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revision = 'a54c57ada3f5'
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down_revision = '1c2c61ac1f4c'
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branch_labels = None
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depends_on = None
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resource_tables = [(t, "id") for t in [
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"instance",
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"instance_disk",
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"instance_net_int",
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"swift_account",
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"volume",
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"ceph_account",
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"network",
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"identity",
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"ipmi",
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"stack",
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"image"
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]]
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history_tables = [("%s_history" % t, "revision")
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for t, c in resource_tables]
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other_tables = [("metric", "id"), ("archive_policy", "name"),
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("archive_policy_rule", "name"),
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("resource", "id"),
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("resource_history", "id")]
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def upgrade():
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bind = op.get_bind()
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# NOTE(sileht): mysql can't delete an index on a foreign key
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# even this one is not the index used by the foreign key itself...
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# In our case we have two indexes fk_resource_history_id_resource_id and
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# and ix_resource_history_id, we want to delete only the second, but mysql
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# can't do that with a simple DROP INDEX ix_resource_history_id...
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# so we have to remove the constraint and put it back...
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if bind.engine.name == "mysql":
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op.drop_constraint("fk_resource_history_id_resource_id",
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type_="foreignkey", table_name="resource_history")
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for table, colname in resource_tables + history_tables + other_tables:
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op.drop_index("ix_%s_%s" % (table, colname), table_name=table)
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if bind.engine.name == "mysql":
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op.create_foreign_key("fk_resource_history_id_resource_id",
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"resource_history", "resource", ["id"], ["id"],
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ondelete="CASCADE")
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