CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4rubygems
Sylar
Sylar

Reputation: 12092

Safe and best way to monkey patch a rails gem

I have tried, seriously. Many questions out there but many developers say "It dont work for me"; I'm one of them -- said to say.

I was reading up on the best way to monkey-patch a rails gem. I've found few but decided to use this method.

I want to monkey-patch the xeroizer gem but rather the invoice.rb model.

# lib/xeroizer/invoice/invoice_url.rb

module Xeroizer
  module Invoice
    module InvoiceUrl
      def invoice_url(id)
        @application.http_get(@application.client, "#{url}/#{CGI.escape(id)}/OnlineInvoice")
      end
    end
  end
end

Going with the "this method" link, I assume this should work, but it dosent.

Controller:

include Xeroizer::Invoice::InvoiceUrl
# Invoice.include Xeroizer::Invoice::InvoiceUrl

def some_method
  # @xero is in a private method. It's here for short demonstration
  @xero = Xeroizer::PrivateApplication.new("MY_CONSUMER_KEY", "MY_SECRET_KEY", "#{Rails.root}/privatekey.pem")
  Rails.logger = @xero.Invoice.invoice_url("ad61ea97-b9e9-4a1e-b754-7c19e62f8cd7")
end

undefined method `invoice_url' for Xeroizer::Record::InvoiceModel

How do you add custom methods to a rails gem's class?

Upvotes: 3

Views: 4672

Answers (1)

Aleksei Matiushkin
Aleksei Matiushkin

Reputation: 121010

Assuming you are trying to monkey-patch Xeroizer::Record::InvoiceModel with Xeroizer::Invoice::InvoiceUrl, you might just do the following right after the first mention of Xeroizer::Record::InvoiceModel (to make Rails to autoload it):

Xeroizer::Record::InvoiceModel.prepend Xeroizer::Invoice::InvoiceUrl

This will override original invoice_url method. The original one still might be called from a prepended using super.

Upvotes: 4

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