go-domain-model

To enforce business invariants in a Go backend, you implement the failing-constructor pattern to prevent the creation of invalid objects, ensuring state transitions remain atomic, testable, and documented at the type level.

Structuring Domain-Driven Design aggregates in Go requires using pointer-receiver method sets for aggregate roots and immutable value objects, ensuring your domain models remain pure and framework-agnostic.

You generate a Go aggregate root by applying tactical DDD patterns, utilizing table-driven unit testing for all mutation paths to verify that business rules are enforced and illegal states are unrepresentable.

You need domain events in your Go domain model when complex business rules require atomic event emission alongside strict state validation, allowing state transitions to be documented and testable.

Using standard Go structs without domain purity risks failing to enforce business invariants. To make illegal states unrepresentable, you must use immutable value objects and failing constructors rather than plain structs.