Interactor Example

gistfile1.rb

### We are highlighting a workflow to retrieve Employees who
### have the title of department leaders.
### The web entry point comes through the controller,
### but it's important for the controller to have no logic.
### It simply knows that it must call the department leaders
### method on the interactor.

class EmployeeController < ApplicationController
  def get_department_leaders
    leaders = Interactor::Employees.get_deparment_leaders
    render 'deparment_leaders', :locals => {:leaders => leaders}
  end
end

### Our interactor knows all about our domain. It can makes database calls, makes
### use of models and do all sorts of application logic that is separated from
### HTTP and web concerns.

module Interactor
  module Employees
    def get_department_leaders
      Employee.where(:title => "Department Leader")
    end
  end
end

### The above is just an Active Record query on an existing model

class Employee < ActiveRecord::Base
   ### attribute :title
end