play with state_machine gem

test_state.rb

class TestState
  include Mongoid::Document
  include Mongoid::Timestamps


  state_machine :state, initial: :authorized do
    event :capture_money do
      transition :authorized => :captured
    end

    event :error_with_card do
      transition :authorized => :error
    end

    event :retry do
      transition :error => :foo
      transition :authorized => :bang
      transition :bang => :error
    end

    
    before_transition :authorized => :captured, :do => :charge
    after_transition :authorized => :captured, :do => :did_capture
    after_transition :authorized => :error, :do => :show_error
  end

  def try_capture_money
    capture_money
    error_with_card if state == "authorized"
  end

  def show_error
    puts "show error: state: #{state}"
  end

  def charge
    puts "charge"
    false
  end

  def did_capture
    puts "did_capture"
  end
end