ActiveResource doesn't parse validations when extended content type

I've also had problems with this when using Rails 2.3.4 to consume a resource from a Rails 2.1.1 app. I believe this can be fixed by changing validations.rb in the ActiveResource(2.3.4) gem starting with line 258:

    def save_with_validation
      save_without_validation
      true
    rescue ResourceInvalid => error
      case error.response['Content-Type']
      when /application\/xml/
        errors.from_xml(error.response.body)
      when /application\/json/
        errors.from_json(error.response.body)
      end
      false
    end

In the above lines I've changed the case statement to use regex instead of doing a strict string match.

Any reader of this ticket who wants to fix their own app can use this monkey patch:

module ActiveResource
  # Errors returned from the API layer were not getting put into our User object as of Rails 2.3.4
  class Base
    def save
      save_without_validation
      true
    rescue ResourceInvalid => error
      case error.response['Content-Type']
      when /application\/xml/
        errors.from_xml(error.response.body)
      when /application\/json/
        errors.from_json(error.response.body)
      end
      false
    end
  end
end

For the reference, it was resolved in http://github.com/rails/rails/commit/1488c6cc9e6237ce794e3c4a620162...

Thanks Jatinder! :)