How to use 'stale?' in rails with eTAg

Question

I am new to rails. I am trying to use cache and Etag to throw 304 status when the content is not modified.

My controller code is like this:

 def index
    @projects = @current_user.projects
    if stale?(@projects, public: true)
      render json: {"projects" => @current_user.projects.as_json}, status: 200
    end
  end

I am passing strong ETag with If-None-Match header but I am receiving the 200 status all the times irrespective of the If-None-Match header value.

Thanks in advance!

Answer 1

Is it possible you're running this in development, without setting config.perform_caching to true in config/environments/development.rb ? Essentially caching is disabled by default in development, so to be able to play with this functionality, you need to enable it.