Need a Rails example done on how to succesfully use the [url removed, login to view] method from within a Decorator

I need a very small Rails example done on how to succesfully use the [url removed, login to view] method from within a Presenter initialized from a controller, and used in a HAML view.

The Presenter must be a subclass of a Draper Decorator ([url removed, login to view]):

So to sum up:

In the controller:

def index

@presenter = SomePresenter::new(view_context)


In the Presenter:

class SomePresenter < ApplicationDecorator

def initialize(view_context)



def some_method

[url removed, login to view]("a_key") do





And in the HAML view:

%h1 = @presenter.some_method


This gives me this error: "You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating [url removed, login to view]"

I need to be able to call cache and return the content to HAML from SomePresenter.

See also my Stack Overflow question on this: [url removed, login to view]

Note that monkey patching either Draper or Rails is not an option to solve this. It must be solved completely by the Presenter class, and must use a presenter initialized in a controller, inheriting from Draper, and used in a HAML view.

The solution to this does not need to be private only to me. I just need the solution. A public git project that shows how to do this, and works, is fine and will be paid.

I have created a git repository to start from that shows my problem and what I want to do:

Skills: Ruby on Rails

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