hs-data/apps/api/alembic/env.py

"""Alembic environment.

Runs migrations against the async engine. The database URL comes from app
settings (``DATABASE_URL`` env var with a local default). The asyncpg async URL
is used directly via SQLAlchemy's async engine + ``connection.run_sync``.
"""

from __future__ import annotations

import asyncio
from logging.config import fileConfig

from alembic import context
from sqlalchemy.ext.asyncio import async_engine_from_config
from sqlalchemy import pool

from app.config import get_settings
from app.db.models import Base

config = context.config

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

# Inject the runtime database URL.
config.set_main_option("sqlalchemy.url", get_settings().database_url)

target_metadata = Base.metadata


def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode (emit SQL, no DBAPI)."""
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        compare_type=True,
    )
    with context.begin_transaction():
        context.run_migrations()


def do_run_migrations(connection) -> None:
    context.configure(
        connection=connection,
        target_metadata=target_metadata,
        compare_type=True,
    )
    with context.begin_transaction():
        context.run_migrations()


async def run_migrations_online() -> None:
    """Run migrations in 'online' mode using the async engine."""
    connectable = async_engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )
    async with connectable.connect() as connection:
        await connection.run_sync(do_run_migrations)
    await connectable.dispose()


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