Problem with ApplicationController.render when it renders JBuilder template

[the-teacher]

I think, ApplicationController.render should return data in json format when it works with jbuilder templates. Right now it returns a string.

There is a similar problem and expectation from SO user:

http://stackoverflow.com/questions/39103685/can-you-invoke-jbuilder-to-create-a-native-rails-object-instead-of-a-rendered-st

Right now I solved it with simple helpers, like this:

module ChannelHelper
  def render_view(params)
    ApplicationController.render(params)
  end

  def render_json(params)
    JSON.parse render_view(params)
  end

  def broadcast channel, message
    ActionCable.server.broadcast channel, message
  end
end

https://github.com/DeployRB/Rails5App/blob/master/app/channels/notes_channel.rb#L18