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Diffstat (limited to 'mediagoblin/db/migrations.py')
-rw-r--r-- | mediagoblin/db/migrations.py | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/mediagoblin/db/migrations.py b/mediagoblin/db/migrations.py new file mode 100644 index 00000000..99448bfa --- /dev/null +++ b/mediagoblin/db/migrations.py @@ -0,0 +1,189 @@ +# GNU MediaGoblin -- federated, autonomous media hosting +# Copyright (C) 2011, 2012 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 datetime + +from sqlalchemy import (MetaData, Table, Column, Boolean, SmallInteger, + Integer, Unicode, UnicodeText, DateTime, + ForeignKey) +from sqlalchemy.exc import ProgrammingError +from sqlalchemy.ext.declarative import declarative_base +from migrate.changeset.constraint import UniqueConstraint + +from mediagoblin.db.sql.util import RegisterMigration +from mediagoblin.db.sql.models import MediaEntry, Collection, User + +MIGRATIONS = {} + + +@RegisterMigration(1, MIGRATIONS) +def ogg_to_webm_audio(db_conn): + metadata = MetaData(bind=db_conn.bind) + + file_keynames = Table('core__file_keynames', metadata, autoload=True, + autoload_with=db_conn.bind) + + db_conn.execute( + file_keynames.update().where(file_keynames.c.name == 'ogg'). + values(name='webm_audio') + ) + db_conn.commit() + + +@RegisterMigration(2, MIGRATIONS) +def add_wants_notification_column(db_conn): + metadata = MetaData(bind=db_conn.bind) + + users = Table('core__users', metadata, autoload=True, + autoload_with=db_conn.bind) + + col = Column('wants_comment_notification', Boolean, + default=True, nullable=True) + col.create(users, populate_defaults=True) + db_conn.commit() + + +@RegisterMigration(3, MIGRATIONS) +def add_transcoding_progress(db_conn): + metadata = MetaData(bind=db_conn.bind) + + media_entry = Table('core__media_entries', metadata, autoload=True, + autoload_with=db_conn.bind) + + col = Column('transcoding_progress', SmallInteger) + col.create(media_entry) + db_conn.commit() + + +class Collection_v0(declarative_base()): + __tablename__ = "core__collections" + + id = Column(Integer, primary_key=True) + title = Column(Unicode, nullable=False) + slug = Column(Unicode) + created = Column(DateTime, nullable=False, default=datetime.datetime.now, + index=True) + description = Column(UnicodeText) + creator = Column(Integer, ForeignKey(User.id), nullable=False) + items = Column(Integer, default=0) + +class CollectionItem_v0(declarative_base()): + __tablename__ = "core__collection_items" + + id = Column(Integer, primary_key=True) + media_entry = Column( + Integer, ForeignKey(MediaEntry.id), nullable=False, index=True) + collection = Column(Integer, ForeignKey(Collection.id), nullable=False) + note = Column(UnicodeText, nullable=True) + added = Column(DateTime, nullable=False, default=datetime.datetime.now) + position = Column(Integer) + + ## This should be activated, normally. + ## But this would change the way the next migration used to work. + ## So it's commented for now. + __table_args__ = ( + UniqueConstraint('collection', 'media_entry'), + {}) + +collectionitem_unique_constraint_done = False + +@RegisterMigration(4, MIGRATIONS) +def add_collection_tables(db_conn): + Collection_v0.__table__.create(db_conn.bind) + CollectionItem_v0.__table__.create(db_conn.bind) + + global collectionitem_unique_constraint_done + collectionitem_unique_constraint_done = True + + db_conn.commit() + + +@RegisterMigration(5, MIGRATIONS) +def add_mediaentry_collected(db_conn): + metadata = MetaData(bind=db_conn.bind) + + media_entry = Table('core__media_entries', metadata, autoload=True, + autoload_with=db_conn.bind) + + col = Column('collected', Integer, default=0) + col.create(media_entry) + db_conn.commit() + + +class ProcessingMetaData_v0(declarative_base()): + __tablename__ = 'core__processing_metadata' + + id = Column(Integer, primary_key=True) + media_entry_id = Column(Integer, ForeignKey(MediaEntry.id), nullable=False, + index=True) + callback_url = Column(Unicode) + +@RegisterMigration(6, MIGRATIONS) +def create_processing_metadata_table(db): + ProcessingMetaData_v0.__table__.create(db.bind) + db.commit() + + +# Okay, problem being: +# Migration #4 forgot to add the uniqueconstraint for the +# new tables. While creating the tables from scratch had +# the constraint enabled. +# +# So we have four situations that should end up at the same +# db layout: +# +# 1. Fresh install. +# Well, easy. Just uses the tables in models.py +# 2. Fresh install using a git version just before this migration +# The tables are all there, the unique constraint is also there. +# This migration should do nothing. +# But as we can't detect the uniqueconstraint easily, +# this migration just adds the constraint again. +# And possibly fails very loud. But ignores the failure. +# 3. old install, not using git, just releases. +# This one will get the new tables in #4 (now with constraint!) +# And this migration is just skipped silently. +# 4. old install, always on latest git. +# This one has the tables, but lacks the constraint. +# So this migration adds the constraint. +@RegisterMigration(7, MIGRATIONS) +def fix_CollectionItem_v0_constraint(db_conn): + """Add the forgotten Constraint on CollectionItem""" + + global collectionitem_unique_constraint_done + if collectionitem_unique_constraint_done: + # Reset it. Maybe the whole thing gets run again + # For a different db? + collectionitem_unique_constraint_done = False + return + + metadata = MetaData(bind=db_conn.bind) + + CollectionItem_table = Table('core__collection_items', + metadata, autoload=True, autoload_with=db_conn.bind) + + constraint = UniqueConstraint('collection', 'media_entry', + name='core__collection_items_collection_media_entry_key', + table=CollectionItem_table) + + try: + constraint.create() + except ProgrammingError: + # User probably has an install that was run since the + # collection tables were added, so we don't need to run this migration. + pass + + db_conn.commit() |