respond_with having issue with Rails 5

Question

I am upgrading my Rails app from 4.1.1 to 5.1.4.

I am using roar-rails gem to parsing and rendering REST documents. I am facing some issues as responders gem has been extracted to separate gem.

respond_with has been moved to 'responders' gem.

My rails 4 code lookgs like this:

PostsController:

class PostsController < ApplicationController
  respond_to :json

  def index
    posts = current_user.posts
    respond_with posts, :represent_with => PostsRepresenter, current_user: current_user
  end
end

My representers for Post

module PostsRepresenter
  # Rails 4 code
  # include Roar::Representer::JSON::HAL
  # Rails 5 code (after adding responders) --------
  include Roar::JSON
  include Roar::Hypermedia
  # Rails 5 code --------

  collection(
    :post,
    class: Post,
    extend: PostRepresenter,
    embedded: true)

    link :make do |args|
      p "............. #{args.inspect}"
      # In rails 4, args are coming correctly what is passing from Controller
      # But in rails 5, args is coming `nil`
      posts_path if args[:current_user].can_create?(Post)
    end
end

Post representer

module PostRepresenter
  # Rails 4 code
  # include Roar::Representer::JSON::HAL
  # Rails 5 code (after adding responders) --------
  include Roar::JSON
  include Roar::Hypermedia
  # Rails 5 code --------

  property :title
  property :description
  property :author

  link :self do |args|
    post_path(id) if args[:current_user].can_read?(self)
  end

  link :remove do |args|
    post_path(id) if args[:current_user].can_delete?(self)
  end

  link :edit do |args|
    post_path(id) if args[:current_user].can_update?(self)
  end
end

I am facing issue with args which are passing through Controller, after rails 5, its coming nil.

I have debug the issue and found that in responders gem, options are coming in respond_with method, but I think it could not send it to roar-rails.

/path-to-gem/vendor/responders-master/lib/action_controller/respond_with.rb Here is snippet:

def respond_with(*resources, &block)
  if self.class.mimes_for_respond_to.empty?
    raise "In order to use respond_with, first you need to declare the " \
      "formats your controller responds to in the class level."
  end

  mimes = collect_mimes_from_class_level
  collector = ActionController::MimeResponds::Collector.new(mimes, request.variant)
  block.call(collector) if block_given?

  if format = collector.negotiate_format(request)
    _process_format(format)
    options = resources.size == 1 ? {} : resources.extract_options!
    options = options.clone
    options[:default_response] = collector.response
    p "====================== options :: #{options.inspect}"
    # Options are correct till here but coming `nil` on representers 
    (options.delete(:responder) || self.class.responder).call(self, resources, options)
  else
    raise ActionController::UnknownFormat
  end
end

Please let me know what needs to be done here that make args available in representers

Answer 1

respond_with was deprecated from rails 4.2.1.

https://apidock.com/rails/ActionController/MimeResponds/respond_with