Oct. 24th Thinking about changing database structure and adding in new library

Current database structure is not very convenient for storing payment data from PayPal.
So that i think it should be added in a processed column to indicate if that payment is successfully processed.
And also want to be able to have admin control, an admin column is needed to add into user table too.

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I found a paypal library which helps to receive the signal from PayPal.
http://www.rubyinside.com/paypal-libraries-for-ruby-and-rails-116.html
I will try to add it in and test it by PayPal Sandbox.