gistfile1.txt

c.http_post(c.url,       
Curl::PostField.content('USER', "jb-us-asdasdad.paypal.com"),
Curl::PostField.content('PWD', "asdasasdad"),
Curl::PostField.content('SIGNATURE', "sig"),
Curl::PostField.content('METHOD', "SetExpressCheckout"),
Curl::PostField.content('VERSION', 95),
@cart_product_by_user.each do |product_hash|
  Curl::PostField.content('PAYMENTREQUEST_0_ITEMAMT', product_hash.value ),    #The amount authorized
  Curl::PostField.content('PAYMENTREQUEST_0_SELLERPAYPALACCOUNTID', product_hash.value)   
end
Curl::PostField.content('PAYMENTREQUEST_0_PAYMENTACTION', "Sale"),    #Sets up authorization for a single future payment 
Curl::PostField.content('cancelUrl', "http://localhost:3000/dashboard"),    #For use if the customer decides not to proceed with payment 
Curl::PostField.content('returnUrl', "http://localhost:3000/dashboard")   #For use if the customer proceeds with payment
) 

payment_requests = @cart_product_by_user.map do |product_hash|
  [
    Curl::PostField.content('PAYMENTREQUEST_0_ITEMAMT', product_hash.value ),    #The amount authorized
    Curl::PostField.content('PAYMENTREQUEST_0_SELLERPAYPALACCOUNTID', product_hash.value)   
  ]
end