Making spree 2.0.3 show your gateway error messages

Hi there, happy?

I have developed an active merchant gateway, called 2Pay and I configured my Spree to use it.

It was working great until I got warned that when something goes wrong with the client's credit card, spree is always showing a default error message.

Well, that is terrible because the client will have no idea of what is going on among all possibilities.

PAUSE: I have this on StackOverflow if you feel more comfortable there :)

I had to do one thing, check the spree_core source code using

bundle open spree_core

So I noticed how the checkout_controller was calling a default message when something goes wrong with the Gateway object so I had to update it but it didn't work 100%.

Searching a bit more I found that the order.rb model rescue block wasn't adding the error to the errors hash.

Anyway, these are the two files you need to override and to do that you need to create checkout_controller.rb as checkout_controller_decorator.rb on /controller and the order.rb as order_decorator.rb on /model.

I know the paths are obvious but some user on #spree channel told me to save them on different folder and that was making me more confused.

	module Spree
	CheckoutController.class_eval do
	def update
	if @order.update_attributes(object_params)
	fire_event('spree.checkout.update')
	return if after_update_attributes
	unless @order.next
	flash[:error] = @order.errors[:base].join("\n")
	redirect_to checkout_state_path(@order.state) and return
	end
	if @order.completed?
	session[:order_id] = nil
	flash.notice = Spree.t(:order_processed_successfully)
	flash[:commerce_tracking] = "nothing special"
	redirect_to completion_route
	else
	redirect_to checkout_state_path(@order.state)
	end
	else
	render :edit
	end
	end

view raw checkout_controller_decorator.rb hosted with ❤ by GitHub

	module Spree
	Order.class_eval do
	def process_payments!
	if pending_payments.empty?
	raise Core::GatewayError.new Spree.t(:no_pending_payments)
	else
	pending_payments.each do |payment|
	break if payment_total >= total
	payment.process!
	if payment.completed?
	self.payment_total += payment.amount
	end
	end
	end
	rescue Core::GatewayError => e
	result = !!Spree::Config[:allow_checkout_on_gateway_error]
	errors.add(:base, e.message) and return result
	end
	end
	end

view raw order_decorator.rb hosted with ❤ by GitHub

I really hope it helps you my friend.

Now, be a nice person and say something nice to who's with you :)