mirror of
https://github.com/comfyanonymous/ComfyUI.git
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91 lines
2.4 KiB
Python
91 lines
2.4 KiB
Python
import logging
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import os
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import shutil
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from utils.install_util import get_missing_requirements_message
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from comfy.cli_args import args
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Session = None
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def can_create_session():
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return Session is not None
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try:
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import alembic
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import sqlalchemy
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except ImportError as e:
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logging.error(get_missing_requirements_message())
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raise e
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from alembic import command
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from alembic.config import Config
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from alembic.runtime.migration import MigrationContext
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from alembic.script import ScriptDirectory
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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def get_alembic_config():
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root_path = os.path.join(os.path.dirname(__file__), "../..")
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config_path = os.path.abspath(os.path.join(root_path, "alembic.ini"))
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scripts_path = os.path.abspath(os.path.join(root_path, "alembic_db"))
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config = Config(config_path)
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config.set_main_option("script_location", scripts_path)
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config.set_main_option("sqlalchemy.url", args.database_url)
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return config
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def get_db_path():
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url = args.database_url
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if url.startswith("sqlite:///"):
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return url.split("///")[1]
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else:
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raise ValueError(f"Unsupported database URL '{url}'.")
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def init_db():
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db_url = args.database_url
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logging.debug(f"Database URL: {db_url}")
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config = get_alembic_config()
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# Check if we need to upgrade
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engine = create_engine(db_url)
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conn = engine.connect()
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context = MigrationContext.configure(conn)
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current_rev = context.get_current_revision()
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script = ScriptDirectory.from_config(config)
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target_rev = script.get_current_head()
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if current_rev != target_rev:
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# Backup the database pre upgrade
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db_path = get_db_path()
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backup_path = db_path + ".bkp"
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if os.path.exists(db_path):
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shutil.copy(db_path, backup_path)
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else:
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backup_path = None
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try:
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command.upgrade(config, target_rev)
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logging.info(f"Database upgraded from {current_rev} to {target_rev}")
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except Exception as e:
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if backup_path:
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# Restore the database from backup if upgrade fails
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shutil.copy(backup_path, db_path)
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os.remove(backup_path)
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logging.error(f"Error upgrading database: {e}")
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raise e
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global Session
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Session = sessionmaker(bind=engine)
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def create_session():
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return Session()
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