html - 使用 check_box_tag 时如何使复选框默认选中？

Question

= form_tag movies_path, :id => 'ratings_form', :method => :get do

  Include:

  - @all_ratings.each do |rating|
    = rating
    - is_checked = (!@selected_ratings.nil? && @selected_ratings.include?(rating))
    = check_box_tag "ratings[#{rating}]", is_checked, is_checked, {:id => "ratings_#{rating}"}
    = submit_tag 'Refresh', :id => 'ratings_submit'

Answer 1

参考：-check_box_tag

改变

check_box_tag "ratings[#{rating}]", is_checked, is_checked, {:id => "ratings_#{rating}"}

至

check_box_tag "ratings[#{rating}]", is_checked, true, {:id => "ratings_#{rating}"}