197 lines
8.7 KiB
Python
197 lines
8.7 KiB
Python
# 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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import migrate
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import sqlalchemy
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from sqlalchemy import inspect
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from sqlalchemy import (Table, Index, UniqueConstraint)
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from sqlalchemy.schema import (DropConstraint)
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def _change_db2_unique_constraint(operation_type, constraint_name, *columns):
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constraint = migrate.UniqueConstraint(*columns, name=constraint_name)
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operation = getattr(constraint, operation_type)
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operation()
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def upgrade(migrate_engine):
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meta = sqlalchemy.MetaData()
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meta.bind = migrate_engine
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inspector = inspect(migrate_engine)
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metadef_namespaces = Table('metadef_namespaces', meta, autoload=True)
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metadef_properties = Table('metadef_properties', meta, autoload=True)
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metadef_objects = Table('metadef_objects', meta, autoload=True)
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metadef_ns_res_types = Table('metadef_namespace_resource_types',
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meta, autoload=True)
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metadef_resource_types = Table('metadef_resource_types', meta,
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autoload=True)
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metadef_tags = Table('metadef_tags', meta, autoload=True)
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constraints = [('ix_namespaces_namespace',
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[metadef_namespaces.c.namespace]),
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('ix_objects_namespace_id_name',
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[metadef_objects.c.namespace_id,
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metadef_objects.c.name]),
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('ix_metadef_properties_namespace_id_name',
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[metadef_properties.c.namespace_id,
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metadef_properties.c.name])]
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metadef_tags_constraints = inspector.get_unique_constraints('metadef_tags')
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for constraint in metadef_tags_constraints:
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if set(constraint['column_names']) == set(['namespace_id', 'name']):
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constraints.append((constraint['name'],
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[metadef_tags.c.namespace_id,
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metadef_tags.c.name]))
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if meta.bind.name == "ibm_db_sa":
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# For db2, the following constraints need to be dropped first,
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# otherwise the index like ix_metadef_ns_res_types_namespace_id
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# will fail to create. These constraints will be added back at
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# the end. It should not affect the origional logic for other
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# database backends.
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for (constraint_name, cols) in constraints:
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_change_db2_unique_constraint('drop', constraint_name, *cols)
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else:
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Index('ix_namespaces_namespace', metadef_namespaces.c.namespace).drop()
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Index('ix_objects_namespace_id_name', metadef_objects.c.namespace_id,
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metadef_objects.c.name).drop()
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Index('ix_metadef_properties_namespace_id_name',
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metadef_properties.c.namespace_id,
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metadef_properties.c.name).drop()
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fkc = migrate.ForeignKeyConstraint([metadef_tags.c.namespace_id],
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[metadef_namespaces.c.id])
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fkc.create()
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# `migrate` module removes unique constraint after adding
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# foreign key to the table in sqlite.
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# The reason of this issue is that it isn't possible to add fkc to
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# existing table in sqlite. Instead of this we should recreate the table
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# with needed fkc in the declaration. Migrate package provide us with such
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# possibility, but unfortunately it recreates the table without
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# constraints. Create unique constraint manually.
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if migrate_engine.name == 'sqlite' and len(
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inspector.get_unique_constraints('metadef_tags')) == 0:
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uc = migrate.UniqueConstraint(metadef_tags.c.namespace_id,
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metadef_tags.c.name)
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uc.create()
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if meta.bind.name != "ibm_db_sa":
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Index('ix_tags_namespace_id_name', metadef_tags.c.namespace_id,
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metadef_tags.c.name).drop()
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Index('ix_metadef_tags_name', metadef_tags.c.name).create()
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Index('ix_metadef_tags_namespace_id', metadef_tags.c.namespace_id,
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metadef_tags.c.name).create()
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if migrate_engine.name == 'mysql':
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# We need to drop some foreign keys first because unique constraints
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# that we want to delete depend on them. So drop the fk and recreate
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# it again after unique constraint deletion.
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fkc = migrate.ForeignKeyConstraint([metadef_properties.c.namespace_id],
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[metadef_namespaces.c.id],
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name='metadef_properties_ibfk_1')
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fkc.drop()
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constraint = UniqueConstraint(metadef_properties.c.namespace_id,
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metadef_properties.c.name,
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name='namespace_id')
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migrate_engine.execute(DropConstraint(constraint))
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fkc.create()
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fkc = migrate.ForeignKeyConstraint([metadef_objects.c.namespace_id],
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[metadef_namespaces.c.id],
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name='metadef_objects_ibfk_1')
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fkc.drop()
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constraint = UniqueConstraint(metadef_objects.c.namespace_id,
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metadef_objects.c.name,
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name='namespace_id')
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migrate_engine.execute(DropConstraint(constraint))
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fkc.create()
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constraint = UniqueConstraint(metadef_ns_res_types.c.resource_type_id,
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metadef_ns_res_types.c.namespace_id,
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name='resource_type_id')
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migrate_engine.execute(DropConstraint(constraint))
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constraint = UniqueConstraint(metadef_namespaces.c.namespace,
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name='namespace')
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migrate_engine.execute(DropConstraint(constraint))
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constraint = UniqueConstraint(metadef_resource_types.c.name,
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name='name')
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migrate_engine.execute(DropConstraint(constraint))
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if migrate_engine.name == 'postgresql':
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met_obj_index_name = (
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inspector.get_unique_constraints('metadef_objects')[0]['name'])
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constraint = UniqueConstraint(
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metadef_objects.c.namespace_id,
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metadef_objects.c.name,
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name=met_obj_index_name)
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migrate_engine.execute(DropConstraint(constraint))
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met_prop_index_name = (
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inspector.get_unique_constraints('metadef_properties')[0]['name'])
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constraint = UniqueConstraint(
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metadef_properties.c.namespace_id,
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metadef_properties.c.name,
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name=met_prop_index_name)
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migrate_engine.execute(DropConstraint(constraint))
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metadef_namespaces_name = (
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inspector.get_unique_constraints(
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'metadef_namespaces')[0]['name'])
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constraint = UniqueConstraint(
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metadef_namespaces.c.namespace,
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name=metadef_namespaces_name)
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migrate_engine.execute(DropConstraint(constraint))
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metadef_resource_types_name = (inspector.get_unique_constraints(
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'metadef_resource_types')[0]['name'])
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constraint = UniqueConstraint(
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metadef_resource_types.c.name,
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name=metadef_resource_types_name)
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migrate_engine.execute(DropConstraint(constraint))
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constraint = UniqueConstraint(
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metadef_tags.c.namespace_id,
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metadef_tags.c.name,
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name='metadef_tags_namespace_id_name_key')
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migrate_engine.execute(DropConstraint(constraint))
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Index('ix_metadef_ns_res_types_namespace_id',
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metadef_ns_res_types.c.namespace_id).create()
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Index('ix_metadef_namespaces_namespace',
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metadef_namespaces.c.namespace).create()
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Index('ix_metadef_namespaces_owner', metadef_namespaces.c.owner).create()
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Index('ix_metadef_objects_name', metadef_objects.c.name).create()
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Index('ix_metadef_objects_namespace_id',
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metadef_objects.c.namespace_id).create()
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Index('ix_metadef_properties_name', metadef_properties.c.name).create()
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Index('ix_metadef_properties_namespace_id',
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metadef_properties.c.namespace_id).create()
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if meta.bind.name == "ibm_db_sa":
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# For db2, add these constraints back. It should not affect the
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# origional logic for other database backends.
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for (constraint_name, cols) in constraints:
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_change_db2_unique_constraint('create', constraint_name, *cols)
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