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Matt Richards

2006-Apr-21 08:33 UTC

[Rails] Paypal payments and IPN

I have followed the instructions over at 
http://dist.leetsoft.com/api/paypal/

In order I:

1. installed the money library with gem install --source 
http://dist.leetsoft.com/api/paypal/ money

2. installed the paypal library with gem install --source 
http://dist.leetsoft.com/api/paypal/ paypal

3. created a new app with rails NewApp

4. added the PaymentHelper module to the app/controllers/application.rb

5. generated controller(and view) Test with ./script/generate controller 
Test index

6. launched the server

7. connected to server with http://<mydomain>/Test/index

I get the following:

NameError in <controller not set>#<action not set>

uninitialized constant Paypal

RAILS_ROOT: script/../config/..
Application Trace | Framework Trace | Full Trace

/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:112:in
`const_missing''
#{RAILS_ROOT}/app/controllers/application.rb:5

/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:112:in
`const_missing''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:129:in
`load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:56:in
`require_or_load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:30:in
`depend_on''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:74:in
`require_dependency''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:69:in 
`prepare_application''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:37:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:115:in 
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:81:in 
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:67:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
./script/server:3

/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:112:in
`const_missing''
#{RAILS_ROOT}/app/controllers/application.rb:5
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:129:in
`load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:56:in
`require_or_load''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:30:in
`depend_on''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:74:in
`require_dependency''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:69:in 
`prepare_application''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:37:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:115:in 
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:81:in 
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:67:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
./script/server:3

This error occured while loading the following files:
application.rb
application_controller/payment_helper/paypal.rb

Could someone please point me in the right direction!!!!


Thanks in advance.

mjr

-- 
Posted via http://www.ruby-forum.com/.

Jordan Elver

2006-Apr-21 09:53 UTC

head link

[Rails] Paypal payments and IPN

> 4. added the PaymentHelper module to the app/controllers/application.rb
I needed to require the paypal module as well:

require ''paypal''
module ApplicationHelper
	include Paypal::Helpers
end

HTH,
Jord

Matt Richards

2006-Apr-21 12:16 UTC

head link

[Rails] Re: Paypal payments and IPN

Jordan Elver wrote:>> 4. added the PaymentHelper module to the app/controllers/application.rb
> 
> I needed to require the paypal module as well:
> 
> require ''paypal''
> module ApplicationHelper
> 	include Paypal::Helpers
> end
> 
> HTH,
> Jord
That got a me a step further, but now, if I put:

 <%= paypal_form_tag %>
     <%= paypal_setup "Item 500", Money.us_dollar(50000), 
"bob@bigbusiness.com", :notify_url => url_for(:path_only =>
false,
:action => ''paypal_ipn'') %>

     Please press here to pay $500US using paypal. <br/>
     <%= submit_tag "Go to paypal >>" %>

   <% end_form_tag %>

into /app/views/test/index.rhtml  I get:

NameError in Test#index

Showing app/views/test/index.rhtml where line #3 raised:

undefined local variable or method `paypal_form_tag'' for 
#<#<Class:0xb796b5bc>:0xb796b544>

Extracted source (around line #3):

1: <h1>Test#index</h1>
2: <p>Find me in app/views/test/index.rhtml</p>
3:  <%= paypal_form_tag %>
4:      <%= paypal_setup "Item 500", Money.us_dollar(50000), 
"bob@bigbusiness.com", :notify_url => url_for(:path_only =>
false,
:action => ''paypal_ipn'') %>
5:
6:      Please press here to pay $500US using paypal. <br/>

RAILS_ROOT: script/../config/..
Application Trace | Framework Trace | Full Trace

#{RAILS_ROOT}/app/views/test/index.rhtml:3:in `_run_rhtml_test_index''

/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:309:in
`compile_and_render_template''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:285:in
`render_template''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:244:in
`render_file''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:697:in
`render_file''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:619:in
`render_with_no_layout''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/layout.rb:251:in
`render_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:53:in
`render''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:53:in
`render''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:909:in
`perform_action_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/filters.rb:355:in
`perform_action_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/rescue.rb:82:in
`perform_action''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:379:in
`process_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/filters.rb:364:in
`process_without_session_management_support''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/session_management.rb:117:in
`process''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:38:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:115:in 
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:81:in 
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:67:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
./script/server:3

#{RAILS_ROOT}/app/views/test/index.rhtml:3:in `_run_rhtml_test_index''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:309:in
`compile_and_render_template''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:285:in
`render_template''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_view/base.rb:244:in
`render_file''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:697:in
`render_file''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:619:in
`render_with_no_layout''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/layout.rb:251:in
`render_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:53:in
`render''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:53:in
`render''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:909:in
`perform_action_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/filters.rb:355:in
`perform_action_without_benchmark''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/benchmarking.rb:69:in
`perform_action_without_rescue''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/rescue.rb:82:in
`perform_action''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/base.rb:379:in
`process_without_filters''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/filters.rb:364:in
`process_without_session_management_support''
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.0/lib/action_controller/session_management.rb:117:in
`process''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/dispatcher.rb:38:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:115:in 
`handle_dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:81:in 
`service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/webrick_server.rb:67:in 
`dispatch''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/servers/webrick.rb:59
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.0/lib/commands/server.rb:30
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 
`require''
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.0/lib/active_support/dependencies.rb:136:in
`require''
./script/server:3

Request

Parameters: None

Show session dump

---
flash: !map:ActionController::Flash::FlashHash {}


Response
Headers: {"cookie"=>[],
"Cache-Control"=>"no-cache"}


-- 
Posted via http://www.ruby-forum.com/.

Bryan Duxbury

2006-Apr-21 14:14 UTC

head link

[Rails] Re: Paypal payments and IPN

I believe the way my project team got it working a while ago was by 
requiring the paypal library in environment.rb. It was as big a 
disappointment to me that it didn''t work out of the box as it is to
you,
I''m sure.

-- 
Posted via http://www.ruby-forum.com/.

Matt Richards

2006-Apr-21 14:46 UTC

head link

[Rails] Re: Paypal payments and IPN

Bryan Duxbury wrote:> I believe the way my project team got it working a while ago was by 
> requiring the paypal library in environment.rb. It was as big a 
> disappointment to me that it didn''t work out of the box as it is
to you,
> I''m sure.
Thanks for the suggestion Bryan, but still no luck.

This whole experience has been very frustrating.  I have wasted so much 
time, I''ve been on forum after forum, even resorted to IRC, still no 
luck, I''ve just as a last resort emailed the developer to see if they 
can help, but tbh don''t expect to hear back.

Looks like Im going to have to break the principles of DRY and write 
another paypal library that works for me.

:(

TFI Friday!

-- 
Posted via http://www.ruby-forum.com/.

Bryan Duxbury

2006-Apr-21 14:50 UTC

head link

[Rails] Re: Paypal payments and IPN

Actually, I was thinking of doing the same thing. A reliable PayPal 
library would be very useful. If you''d like to collaborate on the 
project, let me know.

-- 
Posted via http://www.ruby-forum.com/.

Matt Richards

2006-Apr-21 14:55 UTC

head link

[Rails] Re: Paypal payments and IPN

Bryan Duxbury wrote:> Actually, I was thinking of doing the same thing. A reliable PayPal 
> library would be very useful. If you''d like to collaborate on the 
> project, let me know.

Just noticed I''ve not been logged in.

Yes, this could be a real possibility.   What type of timescale did you 
have in mind?  Tbh, at this stage I only require a very rudimentary 
script to submit payment and handle IPN, but I agree, it would be worth 
writing a comprehensive library.

I''ve had no luck using he PayPal API Plugin either.

-- 
Posted via http://www.ruby-forum.com/.

Paul Hart

2006-Apr-21 15:08 UTC

head link

[Rails] Re: Paypal payments and IPN

The Paypal gem hasn''t been updated in a little while as far as I know; 
I''m sure Tobi is pretty busy with Shopify...

I''ve made some updates to the gem to enable SSL-encrypted buttons that 
have been submitted to Tobi; If you want to take a look, check out:

http://redchocolate.ca/articles/2006/03/01/code-release-for-paypal-gem

and

http://redchocolate.ca/articles/2006/02/03/encrypted-paypal-buttons-with-ruby

You''ll still need to get the latest gem from leetsoft, but update the 
gem with the source in the above links.

To get things to work, I put the following in my 
app/helpers/[controller]_helper.rb:

# Start
require ''paypal''

module PaypalHelper
   include Paypal::Helpers
end
# End

If you have any other questions, feel free to contact me.

Thanks,

Paul

Paul Hart

2006-Apr-21 15:19 UTC

head link

[Rails] Re: Paypal payments and IPN

Matt Richards wrote:> 
> I''ve had no luck using he PayPal API Plugin either.
>
I''m using (and extending) it successfully, but I don''t use the
paypal_form_tag helper. I *do* use paypal_setup, which is the 
''important'' part of the library from the form perspective, and
the IPN
stuff seems to work fine too.

If you want encrypted button support, have a look at my changes:

http://redchocolate.ca/articles/2006/02/03/encrypted-paypal-buttons-with-ruby

http://redchocolate.ca/articles/2006/03/01/code-release-for-paypal-gem

I''ve posted this to the mailing list too, but I have no idea if 
ruby-forum reads what gets mailed there (and I''m on digest mode, so 
that''ll affect it in any event).

-- 
Posted via http://www.ruby-forum.com/.

Dave

2006-Apr-21 20:39 UTC

head link

[Rails] Re: Paypal payments and IPN

Matt Richards wrote:> Jordan Elver wrote:
>>> 4. added the PaymentHelper module to the
app/controllers/application.rb
>> 
>> I needed to require the paypal module as well:
>> 
>> require ''paypal''
>> module ApplicationHelper
>> 	include Paypal::Helpers
>> end
>> 
>> HTH,
>> Jord
> 
> That got a me a step further, but now, if I put:
> 
>  <%= paypal_form_tag %>
>      <%= paypal_setup "Item 500", Money.us_dollar(50000), 
> "bob@bigbusiness.com", :notify_url => url_for(:path_only =>
false,
> :action => ''paypal_ipn'') %>
> 
>      Please press here to pay $500US using paypal. <br/>
>      <%= submit_tag "Go to paypal >>" %>
> 
>    <% end_form_tag %>
> 
> into /app/views/test/index.rhtml  I get:
> 
> NameError in Test#index
> 
> Showing app/views/test/index.rhtml where line #3 raised:
> 
> undefined local variable or method `paypal_form_tag'' for 
> #<#<Class:0xb796b5bc>:0xb796b544>
> 
Hi -

I''ve been using the library with good success for a while. 
Here''s how I
set everything:

1 - put paypal.rb in the \lib folder
2 - include the paypal helper in the \helpers\application_helper.rb, 
like this: include Paypal::Helpers

Then in my controller that I use for payments, I setup the paypal stuff 
like this:

if RAILS_ENV == ''development''
    Paypal::Notification.ipn_url = 
"http://www.sandbox.paypal.com/cgi-bin/webscr"
  else
    Paypal::Notification.ipn_url = 
"https://www.paypal.com/cgi-bin/webscr"
  end

and then in the IPN receive, I do something like this:

 def paypal_ipn

   notify = Paypal::Notification.new(request.raw_post)


Good luck... The library itself is fine - I think you''ll have some 
headaches with Paypal itself, but overall, its been OK.

Dave


-- 
Posted via http://www.ruby-forum.com/.

Matt Richards

2006-Apr-24 21:24 UTC

head link

[Rails] Re: Paypal payments and IPN

Dave wrote:> 2 - include the paypal helper in the \helpers\application_helper.rb, 
> like this: include Paypal::Helpers

That did it.


Nice one.

-- 
Posted via http://www.ruby-forum.com/.

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Rails - Apr 2006 - Paypal payments and IPN

[Rails] Paypal payments and IPN

[Rails] Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

[Rails] Re: Paypal payments and IPN

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