rails-presenter

To extract view logic from Rails models, you can use presenters to wrap models and isolate formatting code, keeping models clean and ensuring consistent UI rendering across your application.

A SimpleDelegator-based presenter in Rails is a design pattern where a presenter class wraps a model, delegating original methods while adding new view-specific formatting methods like display_name or formatted_date.

You test Rails presenter formatting with RSpec by following a TDD workflow: write a failing spec for the resource presenter first, implement the presenter methods, and run the tests until they pass.

Yes, the Rails presenter approach supports I18n-ready formatting, allowing you to internationalize view-facing data outputs directly within the presenter methods instead of scattering translations across your views.

You should move formatting logic into a Rails presenter when your UI-centric Rails app requires clean view logic extraction, needing consistent formatting helpers that clutter models or views if left unisolated.

Yes, you can generate presenter objects for existing Rails models to format model data for views, wrapping them in a base presenter to apply consistent UI rendering and test-driven development.