/usr/lib/python3/dist-packages/gnocchi/indexer/alembic/versions/27d2a1d205ff_add_updating_resource_type_states.py is in python3-gnocchi 4.2.0-0ubuntu5.
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#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
"""Add updating resource type states
Revision ID: 27d2a1d205ff
Revises: 7e6f9d542f8b
Create Date: 2016-08-31 14:05:34.316496
"""
from alembic import op
import sqlalchemy as sa
from gnocchi.indexer import sqlalchemy_types
from gnocchi import utils
# revision identifiers, used by Alembic.
revision = '27d2a1d205ff'
down_revision = '7e6f9d542f8b'
branch_labels = None
depends_on = None
resource_type = sa.sql.table(
'resource_type',
sa.sql.column('updated_at', sqlalchemy_types.PreciseTimestamp()))
state_enum = sa.Enum("active", "creating",
"creation_error", "deleting",
"deletion_error", "updating",
"updating_error",
name="resource_type_state_enum")
def upgrade():
op.alter_column('resource_type', 'state',
type_=state_enum,
nullable=False,
server_default=None)
# NOTE(sileht): postgresql have a builtin ENUM type, so
# just altering the column won't works.
# https://bitbucket.org/zzzeek/alembic/issues/270/altering-enum-type
# Does it break offline migration because we use get_bind() ?
# NOTE(luogangyi): since we cannot use 'ALTER TYPE' in transaction,
# we split the 'ALTER TYPE' operation into several steps.
bind = op.get_bind()
if bind and bind.engine.name == "postgresql":
op.execute("ALTER TYPE resource_type_state_enum RENAME TO \
old_resource_type_state_enum")
op.execute("CREATE TYPE resource_type_state_enum AS ENUM \
('active', 'creating', 'creation_error', \
'deleting', 'deletion_error', 'updating', \
'updating_error')")
op.execute("ALTER TABLE resource_type ALTER COLUMN state TYPE \
resource_type_state_enum USING \
state::text::resource_type_state_enum")
op.execute("DROP TYPE old_resource_type_state_enum")
# NOTE(sileht): we can't alter type with server_default set on
# postgresql...
op.alter_column('resource_type', 'state',
type_=state_enum,
nullable=False,
server_default="creating")
op.add_column("resource_type",
sa.Column("updated_at",
sqlalchemy_types.PreciseTimestamp(),
nullable=True))
op.execute(resource_type.update().values({'updated_at': utils.utcnow()}))
op.alter_column("resource_type", "updated_at",
type_=sqlalchemy_types.PreciseTimestamp(),
nullable=False)
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