Keep check boxes checked in HAML

Question

I have some checkboxes on a HAML doc, which should change the results displayed when I click the 'refresh' button. This works fine, but when the page reloads the boxes that were checked are all unchecked again.

How do I reconfigure the HAML to persist the checkboxes checked state across page views?

= form_tag movies_path, :method => :get do
  Include:
  - @all_ratings.each do |rating|
    = rating
    = check_box_tag "ratings[#{rating}]", '1', true
  = submit_tag 'Refresh'

I have also specified that the checkboxes should be checked by default, but they aren't checked when I load the page...

Answer 1

This will accomplish what you want:

    = form_tag movies_path, :method => :get do
      Include:
      - @all_ratings.each do |rating|
        = rating
        = check_box_tag "ratings[#{rating}]", rating, if params[:ratings]; params[:ratings].include?(rating) end
    = submit_tag 'Refresh'

The params[:ratings] instance persists after the call, so you can just use it to mark the boxes that where clicked by the user before.