sqlalchemy-2-async

SKILL.md

Modern async database patterns with SQLAlchemy 2.0, AsyncSession, and FastAPI integration.

| Session scope | One AsyncSession per task/request | SQLAlchemy docs: "AsyncSession per task" | | Scoped sessions | Avoid for async | Maintainers discourage for async code | | Lazy loading | Use lazy="raise" + explicit loads | Prevents accidental N+1 in async | | Eager loading | selectinload for collections | Better than joinedload for async |

| expireoncommit | Set to False | Prevents lazy load errors after commit | | Connection pool | poolpreping=True | Validates connections before use | | Bulk inserts | Chunk 1000-10000 rows | Memory management for large inserts |

SQLAlchemy 2.0 async patterns with AsyncSession, async_sessionmaker, and FastAPI integration. Use when implementing async database operations, connection pooling, or async ORM queries. Source: yonatangross/orchestkit.

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