Polling Worker Contoller in Rails

my_controller.rb

class MyController < ApplicationController
  def new
  end
  
  def create
    @job_id = MyWorker.perform_async(my_params)
    render :status => :accepted, :json => { jobId: @job_id }
  end
  
  def fetch
    job_id = params[:job_id]
    if Sidekiq::Status::complete? job_id
      render :status => 200, :text => Sidekiq::Status::get(job_id, :output)
    elsif Sidekiq::Status::failed? job_id
      render :status => 500, :text => 'Failed'
    else
      render :status => 202, :text => ''
    end
  end
  
  protected
    def my_params
      params.require(:something).permit(:this)
    end
end

my_worker.rb

class MyWorker
  include Sidekiq::Worker
  include Sidekiq::Status::Worker
  
  def perform(params)
    #do long work
    #...
    #...
    av = ActionView::Base.new(Rails.root.join('app', 'views'))
    av.assign({:outpout => @output})
    store :output, av.render(:template => "my_controller/long_view.html")
  end
end

new.html.erb

<%= form_tag my_controller_create_path, method: :get, id: 'worker-form' do |f| %>
  <%= fields_for "something[]" do |ff| %>
    <%= text_field_tag :this %>
  <% end %>
  <%= submit_tag %>
<% end %>

<div id='result'>
</div>

<%= javascript_tag do %>
  var sendJobForm = function(event) {
    event.preventDefault();
    var $form = $(this),
        $submit = $form.find('input[type=submit]'),
        $result = $('#result');

    function output(msg) { $result.html(msg) }
    function jobFinished(jobResult) {
      $submit.val('Create Job').removeAttr('disabled');
      $result.html(jobResult);
    }

    function pollJob(jobId, successCallback) {
      function poll() {
        var pollEvery = 3000; // milliseconds
        $.ajax({
          type: "GET",
          url: "/my_controller/fetch/" + jobId, // coupled to your app's routes
          dataType: 'text',
          statusCode: {
            200: function(data) { successCallback(data); },
            202: function(data) { setTimeout(poll, pollEvery); },
            500: function(data) { output('Error!'); }
          }
        });
      };
      poll();
    }

    $submit.attr('disabled', true);
    output('Creating...');
    $.ajax({
      type: "POST",
      url: $form.attr('action'),
      data: $form.serialize(),
      dataType: 'json',
      success: function(data) {
        output('Job queued, waiting...');
        pollJob(data.jobId, jobFinished);
      }
    });
  };
  
  $('form').submit(sendJobForm);
<% end %>

routes.rb

get "my_controller/new"
get "my_controller/fetch/:job_id", controller: :my_controller, action: :fetch
post "my_controller/create"