fix-alembic-async-env-py

Alembic migrations fail with greenlet errors because the async SQLAlchemy driver environment conflicts with Alembic's synchronous migration execution. Resolving this requires stripping async suffixes from database URLs and replacing async operations with sync versions.

To fix the alembic env.py file for async SQLAlchemy projects, you must modify the configuration by removing async driver suffixes like +asyncpg and +aiosqlite from database URLs and use sync engines for DDL operations during migrations.

You should use sync engines for DDL operations during Alembic migrations to avoid errors related to async environments. This involves replacing async operations with sync versions in your alembic env.py configuration.

To strip async driver suffixes from SQLAlchemy database URLs for Alembic, remove the +asyncpg and +aiosqlite suffixes from your connection strings. This prevents common Alembic failures and stabilizes the migration setup.

You can run Alembic migrations with asyncpg without crashes by stripping the +asyncpg suffix from the database URL and using a sync engine for DDL operations. This approach ensures compatibility and prevents greenlet errors.

Using sync engines for Alembic migrations in async SQLAlchemy projects limits DDL operations to synchronous execution. While this prevents greenlet errors, the application runtime still requires async drivers for concurrent database operations.