Adding Custom Data to Error Notifications with Middleware in Rails 3.2

I would like to add a custom bugsnag tab for all notifications generated by my rails app.

I can't use: before_bugsnag_notify because errors are sometimes generated by models called from repeated background jobs.

So I decided to use middleware and I have some problems here:

so I went through this guide here: https://bugsnag.com/docs/notifiers/ruby#bugsnag-middleware

and added my middleware in app / middleware like this:

  class CustomMiddleware
    def initialize(bugsnag)
      @bugsnag = bugsnag
    end

    def call(notification)
        puts "doing something"
        @bugsnag.call(notification)
    end
  end

      

        
        
        
      

    

The config file for bugsnag looks like this:

in config / initializers / bugsnag.rb:

Bugsnag.configure do |config|
  config.api_key = "#{ENV['BUGSNAG_API_KEY']}"
  config.middleware.use "CustomMiddleWare"
end

      

        
        
        
      

    

Eventually, I would like to add a tab using the add_tab () method before @ bugsnag.call (), but now I keep running with an error that I cannot fix:

** [Bugsnag] Bugsnag middleware error: undefined method `new' for "CustomMiddleWare":String

      

        
        
        
      

    

Any ideas?

Edit: I had to put the method name on a string because of this: Where do you put the rack middleware files and require?