Add to_param to the Track model

And update the urls

app/views/tracks/_form.html.haml

@@ -9,7 +9,7 @@
           Track
   .row
     .col-md-12
-      = semantic_form_for(@track, url: (@track.new_record? ? conference_program_tracks_path : conference_program_track_path(@conference.short_title, @track.short_name))) do |f|
+      = semantic_form_for(@track, url: (@track.new_record? ? conference_program_tracks_path : conference_program_track_path(@conference.short_title, @track))) do |f|
         = f.input :name
         = f.input :short_name, hint: "A short and unique handle for the track, using only letters, numbers, underscores, and dashes. This will be used to identify the track in URLs etc. Example: 'my_awesome_track'", input_html: { required: 'required', pattern: '[a-zA-Z0-9_-]+', title: 'Only letters, numbers, underscores, and dashes.' }
         = f.input :color, input_html: {size: 6, type: 'color'}, required: true

app/views/tracks/index.html.haml

@@ -21,7 +21,7 @@
             - @tracks.each do |track|
               %tr
                 %td
-                  = link_to(conference_program_track_path(@conference.short_title, track.short_name)) do
+                  = link_to(conference_program_track_path(@conference.short_title, track)) do
                     = track.name
                 %td
                   = track.short_name
@@ -34,7 +34,7 @@
                 %td
                   = track.state
                 %td
-                  = link_to 'Edit', edit_conference_program_track_path(@conference.short_title, track.short_name),
+                  = link_to 'Edit', edit_conference_program_track_path(@conference.short_title, track),
                   method: :get, class: 'btn btn-primary'
 
   .row

app/views/tracks/show.html.haml

@@ -23,4 +23,4 @@
           = @track.description
   .row
     .col-md-12.text-right
-      = link_to 'Edit Track request', edit_conference_program_track_path(@conference.short_title, @track.short_name), class: 'btn btn-primary'
+      = link_to 'Edit Track request', edit_conference_program_track_path(@conference.short_title, @track), class: 'btn btn-primary'