Update required for Gibbon 2.0

[DanielKehoe]

Gibbon 2.0.0 was released July 29, 2015.

When you run bundle install or bundle update the newest Gibbon 2.0 gem will be installed and the application will error with

NameError: uninitialized constant Gibbon::API

Either change the Gemfile and specify

gem 'gibbon',  '~>1.2.0'

or update the code that uses Gibbon.

See https://github.com/amro/gibbon/issues/131

[asalom]

Solved it with the following code:

mailchimp = Gibbon::Request.new(api_key: Rails.application.secrets.mailchimp_api_key)
mailchimp_id = Rails.application.secrets.mailchimp_list_id
result = mailchimp.lists(mailchimp_id).members.create(
    body: {
        :email_address => self.email,
        :status => 'subscribed'
    })

[DanielKehoe]

@asalom that's correct. I'm working on an update to the book.

[asalom]

Thank you, I'm really enjoying your book. It gave me the kickstart I needed to jump into the rails world. If it helps you in any way I improved my solution a little bit by handling the exceptions Gibbon raises when there are any problems with the request such as subscribing an email address more than once.

[DanielKehoe]

@asalom yes it'd be nice to see your exception handling code.

Just a note, that doesn't apply to the learn-rails application, but is relevant if the subscribe method runs as an Active Job: An exception doesn't disrupt the response to the user. You could handle the exception by sending an email to the administrator so you know there was a failure. Or you could install an exception notifier gem such as Rollbar. Otherwise, the exception just gets logged and you don't know unless you search the log files.

[asalom]

When I try to register an email that was previously registered with the new version of Gibbon I got a Gibbon::MailChimpError exception. I catch this on the subscribe method of the Visitor class and return one of the strings from the exception to the VisitorsController for showing as a flash message. The code is on GitHub: https://github.com/asalom/learn-rails/commit/40adf3779f2add384765e88bc03d9a4da3ca9902

[DanielKehoe]

Resolved with commit f4ff55b.