Add conference specifc route to revision history page

app/controllers/admin/versions_controller.rb

@@ -1,15 +1,14 @@
 module Admin
   class VersionsController < Admin::BaseController
+    load_resource :conference, find_by: :short_title
     load_and_authorize_resource class: PaperTrail::Version
 
     def index
-      authorize! :index, PaperTrail::Version.new(item_type: 'User')
-      @conf_ids_for_organizer = current_user.is_admin? ? Conference.pluck(:id) : Conference.with_role(:organizer, current_user).pluck(:id)
-      @conference_id = params[:conference_id].to_i unless params[:conference_id].nil?
+      @conf_ids_for_organizer = current_user.is_admin? ? Conference.pluck(:short_title) : Conference.with_role(:organizer, current_user).pluck(:short_title)
 
-      return unless @conference_id.present?
-      authorize! :index, PaperTrail::Version.new(conference_id: @conference_id)
-      @versions = @versions.where(conference_id:  @conference_id)
+      return unless @conference.present?
+      authorize! :index, PaperTrail::Version.new(conference_id: @conference.id)
+      @versions = @versions.where(conference_id:  @conference.id)
     end
 
     def revert_attribute

app/views/admin/versions/index.html.haml

@@ -4,13 +4,12 @@
 
       .dropdown.pull-right
         %button.btn.btn-success.dropdown-toggle{'data-toggle' => 'dropdown', type: 'button'}
-          = @conference_id.nil? ? 'All Conferences & Users' : Conference.find(@conference_id).short_title
+          = @conference.nil? ? 'All Conferences & Users' : @conference.short_title
           %span.caret
         %ul.dropdown-menu
           %li= link_to 'All Conferences & Users',  admin_revision_history_path
-          - @conf_ids_for_organizer.each do |conf_id|
-            - conference = Conference.find(conf_id)
-            %li= link_to conference.short_title,  admin_revision_history_path(conference_id: conference.id)
+          - @conf_ids_for_organizer.each do |conference_short_title|
+            %li= link_to conference_short_title,  admin_conference_revision_history_path(conference_id: conference_short_title)
 
       %h1 Revision History
       %p.text-muted

app/views/layouts/_admin_sidebar.html.haml

@@ -136,3 +136,8 @@
       = link_to(admin_conference_roles_path(@conference.short_title)) do
         %span.fa.fa-group
         Roles
+  - if can? :index, PaperTrail::Version.new(item_type: 'User')
+    %li{:class=> active_nav_li(admin_conference_revision_history_path(@conference.short_title))}
+      = link_to(admin_conference_revision_history_path(@conference.short_title)) do
+        %span.fa.fa-history
+        Revision History