SQLModel Patterns
Problem Statement
SQLModel combines Pydantic and SQLAlchemy, blurring the line between models and schemas. Async SQLAlchemy has different rules than sync. Mistakes here cause data corruption, N+1 queries, and hard-to-debug errors.
Pattern: Eager Loading for Async
Problem: Lazy loading doesn't work with async SQLAlchemy. Accessing relationships without eager loading raises errors.
# ❌ WRONG: Lazy loading fails in async
result = await session.execu
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