Tulir Asokan
82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
import argparse
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import sqlalchemy as sql
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from sqlalchemy import orm
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from sqlalchemy.ext.declarative import declarative_base
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from alchemysession import AlchemySessionContainer
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parser = argparse.ArgumentParser(description="mautrix-telegram dbms migration script",
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prog="python -m mautrix_telegram.scripts.dbms_migrate")
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parser.add_argument("-f", "--from-url", type=str, required=True, metavar="<url>",
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help="the old database path")
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parser.add_argument("-t", "--to-url", type=str, required=True, metavar="<url>",
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help="the new database path")
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parser.add_argument("-v", "--verbose", action="store_true", help="Verbose logs while migrating")
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args = parser.parse_args()
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verbose = args.verbose or False
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def log(message, end="\n"):
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if verbose:
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print(message, end=end, flush=True)
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def connect(to):
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import mautrix_telegram.db.base as base
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base.Base = declarative_base(cls=base.BaseBase)
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from mautrix_telegram.db import (Portal, Message, UserPortal, User, RoomState, UserProfile,
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Contact, Puppet, BotChat, TelegramFile)
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db_engine = sql.create_engine(to)
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db_factory = orm.sessionmaker(bind=db_engine)
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db_session = orm.scoped_session(db_factory) # type: orm.Session
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base.Base.metadata.bind = db_engine
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session_container = AlchemySessionContainer(engine=db_engine, session=db_session,
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table_base=base.Base, table_prefix="telethon_",
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manage_tables=False)
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return db_session, {
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"Version": session_container.Version,
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"Session": session_container.Session,
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"Entity": session_container.Entity,
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"SentFile": session_container.SentFile,
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"UpdateState": session_container.UpdateState,
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"Portal": Portal,
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"Message": Message,
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"Puppet": Puppet,
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"User": User,
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"UserPortal": UserPortal,
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"RoomState": RoomState,
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"UserProfile": UserProfile,
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"Contact": Contact,
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"BotChat": BotChat,
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"TelegramFile": TelegramFile,
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}
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log("Connecting to old database")
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session, tables = connect(args.from_url)
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data = {}
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for name, table in tables.items():
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log("Reading table {name}...".format(name=name), end=" ")
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data[name] = session.query(table).all()
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log("Done!")
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log("Connecting to new database")
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session, tables = connect(args.to_url)
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for name, table in tables.items():
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log("Writing table {name}".format(name=name), end="")
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length = len(data[name])
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n = 0
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for row in data[name]:
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session.merge(row)
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n += 5
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if n >= length:
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log(".", end="")
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n = 0
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log(" Done!")
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log("Committing changes to database...", end=" ")
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session.commit()
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log("Done!")
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