Hello!
I’m trying to integrate PayPal into my (first) Rails app. I’ve been
looking at RailsCast #142,
#142 PayPal Notifications - RailsCasts.
But I don’t get it to work. My app isn’t a normal e-commerce site,
it’s a buy and sell site. Every ad has a ‘published’ boolean, which I
want to set to true if the user completes the payment process. My code
looks like this.
Order model:
class Order < ActiveRecord::Base
belongs_to :ad
def paypal_url(return_url, notify_url)
values = {
:business => ‘anders_1291665108_biz@my_mail.se’,
:cmd => ‘_xclick’,
:currency_code => “SEK”,
:upload => 1,
:return => return_url,
:invoice => id,
:amount => 15,
:item_name => “Ad”,
:quantity => 1,
:lc => “SE”,
:notify_url => notify_url
}
“https://www.sandbox.paypal.com/cgi-bin/webscr?” +
values.to_query
end
end
My Payment Notifications Controller:
class PaymentNotificationsController < ApplicationController
protect_from_forgery :except => [:create]
def create
PaymentNotification.create!(:params => params, :ad_id =>
params[:invoice], :status => params[:payment_status],
:transaction_id => params[:txn_id])
render :nothing => true
end
end
And my Payment Notification model (where I think the problem is):
class PaymentNotification < ActiveRecord::Base
belongs_to :ad
serialize :params
after_create :mark_ad_as_purchased
def mark_ad_as_purchased
if status == “Completed”
ad.update_attribute(:published => true)
end
end
end
I get an error that says:
NoMethodError in Payment notificationsController#create
You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.update_attribute
Any help or tips would be appreciated!
Thanks
Anders
