Install

gem install interactor2

API

Method	Summary
Interactor2.perform	::new and then #perform, all arguments will be passed to #initialize.
Interactor2#fail!	Fail the interactor.
Interactor2#perform	Must be overridden in child class, and should not call it directly, use ::perform instead.
Interactor2#error	Returns the error message.
Interactor2#success?	Returns true if there is no error.

Usage

require 'interactor2'
class AddToCart < Interactor2
  attr_reader :line_item, :cart # should be any attribute you want to expose

  def initialize(product, cart)
    @cart = cart
    @line_item = cart.line_items.new(product: product)
  end

  # business logic here.
  def perform
    unless @line_item.save
      fail! 'oops'
    end
  end
end

  add_to_cart = AddToCart.perform(@product)
  if add_to_cart.success?
    add_to_cart.item
    add_to_cart.cart
  else
    add_to_cart.error # => 'oops'
  end