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Why Ormdantic

Ormdantic is for Python teams that want Pydantic models at the API boundary and a native Rust runtime underneath the ORM.

Rust Runtime

SQL compilation, relationship planning, hydration, and database execution run through focused Rust crates.

Pydantic First

Your table models remain normal Pydantic v2 models, so validation and serialization stay familiar.

Async Safe

Relationship loading is explicit. There is no hidden synchronous lazy loading on attribute access.

What Makes It Different

  • A single private PyO3 extension powers the Python package, similar to the architecture used by pydantic-core.
  • The Python layer is intentionally small: decorators, event callbacks, final model construction, and ergonomic facades.
  • SQLite, PostgreSQL, MySQL, MariaDB, SQL Server, and Oracle are supported by the Rust runtime.
  • Query expressions, migrations, reflection, sessions, events, association proxies, and hybrid attributes are exposed through Python facades while core execution stays native.