Form with hidden fields

gistfile1.txt

# routes.rb
  get :show_form, to: 'users#show_form'
  get :do_form, to: 'users#do_form'
  
# added to users_controller.rb
  # GET /show_form
  def show_form
  end

  # GET /do_form
  def do_form
    @top_secret = params[:top_secret]
    @top_top_secret = params[:top_top_secret]
    respond_to do |format|
      format.html
    end
    
  end

# views/users/show_form.html.erb
<%= form_with(url: "/do_form", method: "get", local:true) do %>
  <%= hidden_field_tag(:top_secret, 43) %>
  <%= hidden_field_tag(:top_top_secret, 42) %>
  <%= submit_tag("Wanna know a secret?") %>
<% end %>

# views/users/do_form.html.erb
<h1>You're cleared</h1>

1. Top Secret: <%= @top_secret %>
1. Top Top Secret: <%= @top_top_secret %>