Changing the checkout flow in spree-0.10.2

I n开发者_开发知识库eed a checkout process devoid of a delivery and payment step (working on a store which accept cash on delivery so I need only the address step.) I am using Spree 0.10.2

Things I have tried: In the site_extension.rb added the following state machine

Checkout.state_machines[:state] = StateMachine::Machine.new(Checkout, :initial => 'address') do 
      after_transition :to => 'complete', :do => :complete_order 
      before_transition :to => 'complete', :do => :process_payment 
      event :next do 
        transition :to => 'complete', :from => 'address' 
      end 
    end 

The unwanted steps are removed (at least visually) but when I submit the address it throws up the following error.

IndexError in CheckoutsController#update "payment" is an invalid name

Looking at the trace and couple of similar errors later, I decide to blindly override two methods from checkouts_controller.rb in site_extension.rb to do nothing (since they deal with payment I presume)

 def clear_payments_if_in_payment_state 
 end

 def object_params 
 end

Doing this throws validation errors on all the fields of delivery and billing address. I vaguely have a notion that I need to override a couple of methods from checkouts_controller.rb. If this notion is right then what are those methods.

You need to :

1) Remove the paymenttransition and delivery state transition step.

2) Also overriding the payment_required method .

3) These steps need to be in order_decorator.rb under app/models/spree directory.

checkout_flow do
    go_to_state :address
   # go_to_state :payment
    go_to_state :complete
    remove_transition :from => :delivery, :to => :confirm
    remove_transition :from => :delivery, :to => :confirm
    remove_transition :from => :payment, :to => :confirm
  end
  #Spree::Order.state_machine.before_transition :to => :payment, :do => :set_order

  def set_order
    self.create_proposed_shipments
  end
  def require_email
    return false
  end
  def payment_required?
    false
  end

I have tested this on spree 2-0-stable with rails 3.2.14.

Sorry, I can't really help you: Customizing the checkout process with Spree 0.10.2 is kind of a nightmare. But I would recommend to switch to a more recent version of Spree, like the 1.3-stable. If you switched to that one, it would be as easy as creating an order_decorator.rb file in your_app_folder/app/models/spree with the following code:

Spree::Order.class_eval do
  remove_checkout_step :delivery 
  remove_checkout_step :payment
end