This is a collection of links, examples and rants about Presenters/Decorators in Rails.
The "Decorator" pattern slowly started gaining popularity in Rails several years ago. It is not part of core Rails, and there's many different interpretations about how it should work in practice.
Jay Fields wrote about it in 2007 (before he switched back to Java and then Clojure): http://blog.jayfields.com/2007/03/rails-presenter-pattern.html
| function mapValues(obj, fn) { | |
| return Object.keys(obj).reduce((result, key) => { | |
| result[key] = fn(obj[key], key); | |
| return result; | |
| }, {}); | |
| } | |
| function pick(obj, fn) { | |
| return Object.keys(obj).reduce((result, key) => { | |
| if (fn(obj[key])) { |
| // connect() is a function that injects Redux-related props into your component. | |
| // You can inject data and callbacks that change that data by dispatching actions. | |
| function connect(mapStateToProps, mapDispatchToProps) { | |
| // It lets us inject component as the last step so people can use it as a decorator. | |
| // Generally you don't need to worry about it. | |
| return function (WrappedComponent) { | |
| // It returns a component | |
| return class extends React.Component { | |
| render() { | |
| return ( |