activemerchant PayPalExpress transaction is invalid
- by Ameya Savale
I am trying to integrate activemerchant into my ruby on rails application. This is my controller where I get the purchase attirbutes and create a PaypalExpressResponse object
def checkout
total_as_cents, purchase_params = get_setup_params(Schedule.find(params[:schedule]), request)
setup_response = @gateway.setup_purchase(total_as_cents, purchase_params)
redirect_to @gateway.redirect_url_for(setup_response.token)
end
@gateway is my PaypalExpressGateway object which I create using this method in my controller
def assign_gateway
@gateway = PaypalExpressGateway.new(
:login => api_user,
:password => api_pass,
:signature => api_signature
)
end
I got the api_user, api_pass, and api_signature values from my developer.paypal.com account, when I logged in for the first time there was already a sandbox user created as a merchant which is where I got the api credentials from.
And finally here is my get_setup_params method:
def get_setup_params(schedule, request)
purchase_params = {
:ip => request.remote_ip,
:return_url => url_for(:action => 'review', :only_path => false, :sched => schedule.id),
:cancel_return_url => register_path,
:allow_note => true,
:item => schedule.id
}
return to_cents(schedule.fee), purchase_params
end
How ever when I click on the checkout button, I get redirected to a sandbox paypal page saying
"This transaction is invalid. Please return to the recipient's website to complete your transaction using their regular checkout flow."
I'm not sure exactly what's wrong, I think the problem lies in the credentials but don't know why. Any help will be appreciated. One other point, I'm running this in my development environment so I have put this in my config file
config.after_initialize do
ActiveMerchant::Billing::Base.mode = :test
end
UPDATE
Found out what the problem was, my return cancel url was invalid instead of using register_path, I used url_for(action: "action-name", :only_path => false) this answer helped me Rails ActiveMerchant - Paypal Express Checkout Error even though I wasn't able to see the output of the response like the person has managed to do
