Files
deb-python-taskflow/taskflow/persistence/backends/sqlalchemy/models.py
Christian Berendt 6132647fb7 Enabled hacking checks H305 and H307
* H305  imports not grouped correctly
* H307  like imports should be grouped together

Change-Id: If1dd9c89f65ede6959865a885777cb08c263eca0
2014-07-17 09:05:48 +02:00

98 lines
3.2 KiB
Python

# -*- coding: utf-8 -*-
# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
# Copyright (C) 2013 Rackspace Hosting Inc. All Rights Reserved.
#
# 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.
from sqlalchemy import Column, String, DateTime, Enum
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import ForeignKey
from sqlalchemy.orm import backref
from sqlalchemy.orm import relationship
from sqlalchemy import types as types
from taskflow.openstack.common import jsonutils
from taskflow.openstack.common import timeutils
from taskflow.openstack.common import uuidutils
from taskflow.persistence import logbook
from taskflow import states
BASE = declarative_base()
# TODO(harlowja): remove when oslo.db exists
class TimestampMixin(object):
created_at = Column(DateTime, default=timeutils.utcnow)
updated_at = Column(DateTime, onupdate=timeutils.utcnow)
class Json(types.TypeDecorator):
impl = types.Text
def process_bind_param(self, value, dialect):
return jsonutils.dumps(value)
def process_result_value(self, value, dialect):
return jsonutils.loads(value)
class ModelBase(TimestampMixin):
"""Base model for all taskflow objects."""
uuid = Column(String, default=uuidutils.generate_uuid,
primary_key=True, nullable=False, unique=True)
name = Column(String, nullable=True)
meta = Column(Json, nullable=True)
class LogBook(BASE, ModelBase):
"""Represents a logbook for a set of flows."""
__tablename__ = 'logbooks'
# Relationships
flowdetails = relationship("FlowDetail",
single_parent=True,
backref=backref("logbooks",
cascade="save-update, delete, "
"merge"))
class FlowDetail(BASE, ModelBase):
__tablename__ = 'flowdetails'
# Member variables
state = Column(String)
# Relationships
parent_uuid = Column(String, ForeignKey('logbooks.uuid'))
atomdetails = relationship("AtomDetail",
single_parent=True,
backref=backref("flowdetails",
cascade="save-update, delete, "
"merge"))
class AtomDetail(BASE, ModelBase):
__tablename__ = 'atomdetails'
# Member variables
atom_type = Column(Enum(*logbook.ATOM_TYPES, name='atom_types'))
state = Column(String)
intention = Column(Enum(*states.INTENTIONS, name='intentions'))
results = Column(Json)
failure = Column(Json)
version = Column(Json)
# Relationships
parent_uuid = Column(String, ForeignKey('flowdetails.uuid'))