How to save ids in the cookies - ruby-on-rails

Question

I am using will_paginate to list a huge ammont of files in different pages. I also have a check_box in order to choose files for the futher analysis.
controller:
#files = FileDB.search(search_string).paginate(:per_page => 10, :page => params[:page])
view:
<button type="button" id="check_all">Check/Uncheck all</button>
<%= button_tag :class => "btn btn-primary", :name => 'analyse' do %>Analyse<% end %>
<% #filess.each do |file| %>
<p><td> <%= check_box_tag "files[]", file.id %></td><%= file.name %></p>
lala...
My problem is that I can choose the files which are situated in one page.So by clicking on "check/uncheck all" it checks not all available files, but files of this specific page. I would like to be able to check different files from different pages together.
Example: 10 files on the page 1, 4 files on the page 2. I want to check 5 files from page one and all files from page 2 and then by clicking on the buttom "Analyse", those 9 files have to be analyzed together, so the checkbox should remember different files from different pages
I know it is possible to save ids in the cookies, but I have found nothing in internet how to do it. I need just a small example
Thanks in advance
edit:
or maybe there is an alternative to the will_paginate that uses POST?
edit2: according to Muntasim
<script type='text/javascript'>
$('#check_all').on("click", function(){ $('input[type="checkbox"]').click(); });
</script>
<script src="/assets/rails.validations.js" type="text/javascript"></script>
<script src="/assets/jquery.cookie.js" type="text/javascript"></script>
<script type="text/javascript">
var checkedIds = $.cookie('checked_file_ids');
$('p td input[type=checkbox]').on('change', function () {
if($(this).is(':checked')) {
checkedIds.push($(this).val())
}
else {
checkedIds.splice(checkedIds.indexOf($(this).val()), 1);
}
$.cookie('checked_file_ids', checkedIds);
})
</script>
<%= form_for Group.new, url: what_to_do_files_path ,method: :get ,:validate => true do |f| %>
<div class="field">
<%=f.text_field :group_name, placeholder: "Group Name" %>
</div>
<%= button_tag :class => "btn btn-primary", :name => 'analyse' do %>Analyse<% end %>
<button type="button" id="check_all" class="btn"> Check/Uncheck All</button>
<% #files.each do |file| %>
<p><td> <%= check_box_tag "files[]", file.id , false %></td><%= file.name %></p>
<%end%>
<%end%>
And in a controller:
def what_to_do
ids_to_compare = cookies['checked_file_ids']
end
But ids_to_compare is empty

Answer 1

You can simply do:
cookies[:ids] = #All checked ids
And then to retrieve the ids you can easily call the cookie like this:
cookies[:ids]

Answer 2

if you want to use cookie:
use jquery.cookie
Now put this in the view
<script type="text/javascript">
var checkedIds = $.cookie('checked_file_ids');
$('p td input[type=checkbox]').on('change', function () {
if($(this).is(':checked')) {
checkedIds.push($(this).val())
}
else {
checkedIds.splice(checkedIds.indexOf($(this).val()), 1);
}
$.cookie('checked_file_ids', checkedIds);
})
</script>
now when you need to compare them you can get the ids: (likely in a controller)
ids_to_compare = cookies['checked_file_ids']