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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import copy
from sqlalchemy import (
Table, Column, MetaData,
Integer, Unicode, UnicodeText, DateTime, Boolean, ForeignKey,
UniqueConstraint, PickleType)
from sqlalchemy.ext.declarative import declarative_base
from migrate import changeset
from mediagoblin.db.sql.base import GMGTableBase
# This one will get filled with local migrations
FULL_MIGRATIONS = {}
#######################################################
# Migration set 1: Define initial models, no migrations
#######################################################
Base1 = declarative_base(cls=GMGTableBase)
class Creature1(Base1):
__tablename__ = "creature"
id = Column(Integer, primary_key=True)
name = Column(Unicode, unique=True, nullable=False, index=True)
num_legs = Column(Integer, nullable=False)
is_demon = Column(Boolean)
class Level1(Base1):
__tablename__ = "level"
id = Column(Integer, primary_key=True)
name = Column(Unicode, unique=True, nullable=False, index=True)
description = Column(UnicodeText)
exits = Column(PickleType)
SET1_MODELS = [Creature1, Level1]
SET1_MIGRATIONS = []
#######################################################
# Migration set 2: A few migrations and new model
#######################################################
Base2 = declarative_base(cls=GMGTableBase)
class Creature2(Base2):
__tablename__ = "creature"
id = Column(Integer, primary_key=True)
name = Column(Unicode, unique=True, nullable=False, index=True)
num_legs = Column(Integer, nullable=False)
class CreaturePower2(Base2):
__tablename__ = "creature_power"
id = Column(Integer, primary_key=True)
creature = Column(
Integer, ForeignKey('creature.id'), nullable=False)
name = Column(Unicode)
description = Column(Unicode)
class Level2(Base2):
__tablename__ = "level"
id = Column(Integer, primary_key=True)
name = Column(Unicode)
description = Column(UnicodeText)
class LevelExit2(Base2):
__tablename__ = "level_exit"
id = Column(Integer, primary_key=True)
name = Column(Unicode)
from_level = Column(
Integer, ForeignKey('level.id'), nullable=False)
to_level = Column(
Integer, ForeignKey('level.id'), nullable=False)
SET2_MODELS = [Creature2, CreaturePower2, Level2, LevelExit2]
@RegisterMigration(1, FULL_MIGRATIONS)
def creature_remove_is_demon(db_conn):
creature_table = Table(
'creature', MetaData(),
autoload=True, autoload_with=db_conn.engine)
db_conn.execute(
creature_table.drop_column('is_demon'))
@RegisterMigration(2, FULL_MIGRATIONS)
def creature_powers_new_table(db_conn):
pass
@RegisterMigration(3, FULL_MIGRATIONS)
def level_exits_new_table(db_conn):
pass
# A hack! At this point we freeze-fame and get just a partial list of
# migrations
PARTIAL_MIGRATIONS = copy.copy(FULL_MIGRATIONS)
#######################################################
# Migration set 3: Final migrations
#######################################################
Base3 = declarative_base(cls=GMGTableBase)
class Creature3(Base3):
__tablename__ = "creature"
id = Column(Integer, primary_key=True)
name = Column(Unicode, unique=True, nullable=False, index=True)
num_limbs= Column(Integer, nullable=False)
class CreaturePower3(Base3):
__tablename__ = "creature_power"
id = Column(Integer, primary_key=True)
creature = Column(
Integer, ForeignKey('creature.id'), nullable=False, index=True)
name = Column(Unicode)
description = Column(Unicode)
class Level3(Base3):
__tablename__ = "level"
id = Column(Integer, primary_key=True)
name = Column(Unicode)
description = Column(UnicodeText)
class LevelExit3(Base3):
__tablename__ = "level_exit"
id = Column(Integer, primary_key=True)
name = Column(Unicode)
from_level = Column(
Integer, ForeignKey('level.id'), nullable=False, index=True)
to_level = Column(
Integer, ForeignKey('level.id'), nullable=False, index=True)
SET3_MODELS = [Creature3, CreaturePower3, Level3, LevelExit3]
@RegisterMigration(4, FULL_MIGRATIONS)
def creature_num_legs_to_num_limbs(db_conn):
pass
@RegisterMigration(5, FULL_MIGRATIONS)
def level_exit_index_from_and_to_level(db_conn):
pass
@RegisterMigration(6, FULL_MIGRATIONS)
def creature_power_index_creature(db_conn):
pass
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