nw-fp-domain-modeling

Type-driven domain modeling prevents invalid states by representing domain invariants as compile-time guarantees. It uses strong type systems to make invalid states unrepresentable, reducing runtime errors in functional workflows and data modeling.

Smart constructors enforce domain logic validation by wrapping primitive types and applying invariant checks during object creation. This guarantees that only valid data enters your system, eliminating the need for subsequent runtime validation checks.

You can model workflows as state machines using algebraic data types to represent distinct lifecycle stages. This approach enforces type-level guarantees, ensuring that state transitions adhere to defined domain rules and preventing invalid workflow progressions.

The best way to handle errors in functional domain workflows is type-level error handling using railway-style pipelines. This method enforces strong type systems to manage bounded contexts and reduce runtime checks by making invalid states unrepresentable.

Domain modeling with strong type systems supports functional design principles by applying algebraic data types and smart constructors. It enforces boundaries on primitives and models domain logic through type-safe workflows and state machines, ensuring compile-time guarantees.