form-object-patterns

Form objects encapsulate multi-model form logic into reusable classes, reducing controller clutter. They centralize validations and persistence logic, making complex forms like multi-model registration simple and testable.

Wizard forms are built by encoding multi-step flows into form objects. This approach manages state across steps with centralized validations, keeping controller and view integration straightforward while maintaining a test-driven workflow.

Yes, ActiveModel enables non-persisted forms and virtual attributes by wrapping them in form objects. This provides centralized validations and clear separation of concerns without needing database persistence for transient data.

Complex form logic is tested by instantiating the form object pattern and running its full test suite. This TDD approach validates multi-model interactions and transactional persistence before integration.

Form objects are ideal when forms span multiple models or require virtual attributes. They provide clearer separation of concerns than nested attributes, reducing controller clutter and improving maintainability for complex scenarios.

Yes, the form object pattern supports transactional persistence when needed. It ensures multi-model forms save atomically, wrapping database transactions to maintain data integrity across related models.