collection_check_boxes Rails Example

HTML code

<div style="width: 150px;height: 100px;overflow: scroll;">

 <%= check_box_tag "All" %>All<br/>   

 <%= f.collection_check_boxes  :category_ids, Category.all, :id, :category_name do |b| %>

    <span>

    <%= b.check_box(class: "check_box")%>

    <%= b.label %>

    </span>

 <% end %>

</div>

Javascript Code 

<script type="text/javascript">

  $(document).ready(function(){

    $('#All').click(function() {  

        if (this.checked) {

           $('.check_box').each(function() {

              this.checked = true;                       

           });

        } else {

           $('.checkbox').each(function() {

              this.checked = false;                       

           });

        }  

     });

   });

</script>