presenter-agent

Rails presenters isolate view logic from models by wrapping models with SimpleDelegator to expose view-focused helpers. This keeps models lean by moving formatting and conditional rendering into dedicated presenter objects.

You test Rails presenters with RSpec by enforcing the Presenter pattern and Single Responsibility Principle through a dedicated test suite. This ensures view helpers and formatting logic behave correctly outside the model layer.

The best way to handle view-specific formatting in Rails is using presenter objects that wrap models to provide formatting and display helpers. This approach safely handles nil values and manages conditional rendering across views and partials.

Yes, you need SimpleDelegator to implement the presenter pattern in Rails. Presenters use SimpleDelegator to wrap model objects, exposing view-specific methods while delegating underlying business logic back to the model.

You should use a presenter instead of a helper in Rails when you need to encapsulate view logic with safe nil handling and conditional rendering tied to a specific model. Helpers remain generic, while presenters wrap individual model instances.

Yes, you can access Rails view helpers from inside a presenter by passing an optional view context during instantiation. This allows the presenter to build display helpers and format values directly within its wrapped methods.