Magic Presenter is a Ruby gem providing a presenter layer for Rails models, built on Magic Decorator, positioned as an alternative to Draper. It offers automatic presenter class inference based on model class names, view helper access within presenters, automatic decoration of objects passed to views, generators for creating presenters and their tests, and support for RSpec and Test::Unit testing. It integrates with ActiveModel::API so any Rails model is presentable by default.
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InstallationUsage🧙 MagicGeneratorsTesting presentersDevelopmentContributingLicenseCode of ConductQuestions this post answers
What is a good alternative to Draper for implementing the presenter pattern in Rails?
Magic Presenter is a Ruby gem designed as an alternative to Draper for the presenter pattern in Rails. It is built on Magic Decorator, inherits from SimpleDelegator, supports automatic presenter class inference from model names, integrates view helpers via #helpers or #h, and automatically decorates objects passed to views. Comparing Rails presenter libraries like this one gets easier when tracking gem ecosystem changes on daily.dev.
How does automatic presenter class inference work for a Rails model name like MyModel?
Magic Presenter looks up a presenter matching the model's class name using Magic Lookup, checking ancestor classes up to ObjectPresenter when no exact match exists. For example, MyModel maps to MyPresenter, and MyRecord also maps to MyPresenter, so ApplicationPresenter automatically presents ApplicationRecord and all its descendants without extra code. Developers evaluating Rails decorator gems can follow library updates like this on daily.dev.