diff --git a/app/assets/javascripts/osem-switch.js b/app/assets/javascripts/osem-switch.js
index 35393625..7a406f2b 100644
--- a/app/assets/javascripts/osem-switch.js
+++ b/app/assets/javascripts/osem-switch.js
@@ -2,6 +2,8 @@ $(function () {
   $("[class='switch-checkbox']").bootstrapSwitch();
 
   $('input[class="switch-checkbox"]').on('switchChange.bootstrapSwitch', function(event, state) {
+      console.log(event);
+      console.log(state);
     var url = $(this).attr('url') + state;
     var method = $(this).attr('method');
 
@@ -11,4 +13,7 @@ $(function () {
       dataType: 'script'
     });
   });
+
+
+
 });
diff --git a/app/controllers/admin/registrations_controller.rb b/app/controllers/admin/registrations_controller.rb
index fd4a02be..281758d3 100644
--- a/app/controllers/admin/registrations_controller.rb
+++ b/app/controllers/admin/registrations_controller.rb
@@ -11,7 +11,8 @@ module Admin
       @attended = @conference.registrations.where('attended = ?', true).count
     end
 
-    def edit; end
+    def edit;
+    end
 
     def update
       @registration.update_attributes(registration_params)
@@ -36,45 +37,22 @@ module Admin
       end
     end
 
-=begin
-    def present
-      @registration.attended = true
-      if @registration.save
-        flash[:notice] = "#{@user.email} has attended"
-        redirect_to admin_conference_registrations_path(@conference.short_title)
-      else
-        flash[:notice] = "Update Attended for #{@user.email} failed!" \
-                         "#{@registration.errors.full_messages.join('. ')}"
-        redirect_to admin_conference_registrations_path(@conference.short_title)
-      end
-    end
-
-    def absent
-      @registration.attended = false
-      if @registration.save
-        flash[:notice] = "#{@user.email} has not attended"
-        redirect_to admin_conference_registrations_path(@conference.short_title)
-      else
-        flash[:notice] = "Update Attended for #{@user.email} failed!" \
-                         "#{@registration.errors.full_messages.join('. ')}"
-        redirect_to admin_conference_registrations_path(@conference.short_title)
-      end
-    end
-=end
-
     def toggle_attendance
-      if params[:attended] == "true"
-        flash[:notice] = "#{@user.email} is attended."
-        @registration.attended = true
-      elsif params[:attended] == "false"
-        flash[:notice] = "#{@user.email} is not attended."
-        @registration.attended = false
+      case params[:attended]
+        when "true"
+          @registration.attended = true
+        when "false"
+          @registration.attended = false
+        else
+          # redirect_to action: :index,
+          #             error: 'Wrong url path.')
       end
-      unless @registration.save
-        flash[:notice] = "Update Attended for #{@user.email} failed!" \
-                         "#{@registration.errors.full_messages.join('. ')}"
+
+      if @registration.save
+        head :ok
+      else
+        head :unprocessable_entity
       end
-      render json: {attended: @registration.attended}
     end
 
     protected
@@ -86,13 +64,13 @@ module Admin
     def registration_params
       params.require(:registration).
           permit(
-          :conference_id, :arrival, :departure,
-          :volunteer,
-          vchoice_ids: [], qanswer_ids: [],
-          qanswers_attributes: [],
-          user_attributes: [
-              :id, :name, :tshirt, :mobile, :volunteer_experience, :languages,
-              :nickname, :affiliation ])
+              :conference_id, :arrival, :departure,
+              :volunteer,
+              vchoice_ids: [], qanswer_ids: [],
+              qanswers_attributes: [],
+              user_attributes: [
+                  :id, :name, :tshirt, :mobile, :volunteer_experience, :languages,
+                  :nickname, :affiliation])
     end
 
   end
diff --git a/app/views/admin/registrations/index.html.haml b/app/views/admin/registrations/index.html.haml
index fdad2aa4..54cc9d5a 100644
--- a/app/views/admin/registrations/index.html.haml
+++ b/app/views/admin/registrations/index.html.haml
@@ -44,8 +44,9 @@
               %td
                 = link_to 'Questions','#', class: 'btn btn-success question-btn', 'data-id' => index, 'data-name' => registration.name
             %td{'data-order' => "#{registration.attended}"}
-              = check_box_tag "#{@conference.short_title}_#{registration.id}", registration.id, registration.attended, class: 'switch-checkbox',
-                method: :patch, url: toggle_attendance_admin_conference_registration_path(@conference.short_title, id: registration.id)+"?attended=",
+              = check_box_tag "#{@conference.short_title}_#{registration.id}", registration.id, registration.attended,
+                class: 'switch-checkbox', method: :patch,
+                url: toggle_attendance_admin_conference_registration_path(@conference.short_title, id: registration.id)+"?attended=",
                 data: { size: "large",
                     on_color: 'success',
                     off_color: 'warning',