pass javascript variable to erb code for checking condition

rubyonrails-talk
1

controller/course_controller.rb:             def edit                 @course = Course.includes(holes: :beacons).find(params[:id])              end

views/course/edit.html.erb

   <%= form_for (@course), remote: true do |cb| %>

          <%= cb.text_field :course_name, class: “name" %>

          <div id="holes">               <% (cb.object.holes).each do |i| %>                 <a href=“#" id="hole-<%= i.id %>" class="holeid" value="<%= i.id %>"><%= i.id %> </a>                 <div class="circular circle-green circle-left"></div>               <% end %>            </div>

      <%= cb.fields_for :holes do |hb| %>           <% if (hb.object.id) == (cb.object.holes.first.id) %>

           <h3> <%= "#{hb.object.id} - #{hb.object.name} " %></h3>

            <%= hb.fields_for :beacons do |bb| %>                     <div class=“tip"> <%= bb.label :CaddyTip %></div>                      <div class=“ctip"> <%= bb.text_area :caddy_tip %></div>

                      <div class=“shot"> <%= bb.label :BestShot %></div>                       <div class=“bshot"> <%= bb.text_area :best_shot %></div>

                     <div class=“be"> <%= bb.label :Be_Aware %></div>                       <div class=“beaware"> <%= bb.text_area :be_aware %></div>

           <% end %>#beacons form close

        <% end %> #if close

      <% end %> # holes form close   <% end %>#course form close

  <script>      var selected = ;      var clickedholeid = $(".holeid").on('click', function(e) {               e.preventDefault();              alert($(e.currentTarget).html());          })    </script>

I want to pass user clicked hole-id to check if condition to display it beacons within the page.My app is about Golf course game. In this a course have 18 holes and each hole have 3 beacons(tip,approach,beaware) respectively. I alert user clicked hole id in console but now i want to pass that value to if condition after holes form in above code. Without that condition its display all 18 holes beacons in edit page.(18 * 3) So I need to stop that and default it display douse first hole beacons after that if user perform click

Attachments: http://www.ruby-forum.com/attachment/10575/0x_alt__1_.jpg

2

If you want to evaluate a *client-side* variable value using Ruby on the server you'll have to send it via AJAX. Otherwise include logic in your JavaScript so the client can handle the checking.

3

function holeid(){   $.ajax({   type: "POST",   url: "course/edit/",   data: "Hole data="+ id,   success: function(id){     alert("Hole ID:"+ id );   } }); }

4

Take a look at this gem: gon | RubyGems.org | your community gem host

Ryan Bates also did a Railscast about it.

5

I would advise you to pay the $9…he’s not charging recurring thereafter…it’s worth it… some of the info has not changed

–Rob