Create Relay Bot MVP

migrations/env.py

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+import asyncio
+import os
+
+from alembic import context
+from sqlalchemy.ext.asyncio import async_engine_from_config
+from sqlalchemy.pool import NullPool
+
+from app.database.models import Base
+
+config = context.config
+target_metadata = Base.metadata
+database_url = os.environ.get("DATABASE_URL", config.get_main_option("sqlalchemy.url"))
+config.set_main_option("sqlalchemy.url", database_url)
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=config.get_main_option("sqlalchemy.url"),
+        target_metadata=target_metadata,
+        literal_binds=True,
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_migrations_online() -> None:
+    connectable = async_engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=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())