document-management/backend/migrations/env.py

"""Alembic运行环境。"""

from __future__ import annotations

from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool

from dms.config import load_dms_config
from dms.extensions import db
import dms.models  # noqa: F401


config = context.config
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

config.set_main_option(
    "sqlalchemy.url",
    load_dms_config()["SQLALCHEMY_DATABASE_URI"].replace("%", "%%"),
)
target_metadata = db.metadata


def run_migrations_offline() -> None:
    context.configure(
        url=config.get_main_option("sqlalchemy.url"),
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        compare_type=True,
        compare_server_default=True,
    )
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
        isolation_level="READ COMMITTED",
        connect_args={"init_command": "SET time_zone = '+00:00'"},
    )
    with connectable.connect() as connection:
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            compare_type=True,
            compare_server_default=True,
        )
        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()