Add new file

rag/alembic/env.py

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+from logging.config import fileConfig
+from sqlalchemy import pool
+from sqlalchemy.ext.asyncio import create_async_engine
+from alembic import context
+import asyncio
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = None
+
+def run_migrations_offline():
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+def run_migrations_online():
+    connectable = create_async_engine(
+        config.get_main_option("sqlalchemy.url"),
+        poolclass=pool.NullPool,
+    )
+
+    async def run_async_migrations():
+        async with connectable.connect() as connection:
+            await connection.run_sync(do_run_migrations)
+        await connectable.dispose()
+
+    def do_run_migrations(connection):
+        context.configure(connection=connection, target_metadata=target_metadata)
+        with context.begin_transaction():
+            context.run_migrations()
+
+    asyncio.run(run_async_migrations())
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()