Improve tracks CRUD

* Add index, edit and update action;
* Add _form partial;
* Add link to tracks/index in nav;
* Refactor specs.

app/controllers/tracks_controller.rb

@@ -1,4 +1,8 @@
 class TracksController < ApplicationController
+  def index
+    @tracks = Track.all
+  end
+
   def show
     @track = Track.find(params[:id])
   end
@@ -7,6 +11,10 @@ class TracksController < ApplicationController
     @track = Track.new
   end
 
+  def edit
+    @track = Track.find(params[:id])
+  end
+
   def create
     @track = Track.new(track_params)
 
@@ -17,6 +25,17 @@ class TracksController < ApplicationController
     end
   end
 
+  def update
+    @track = Track.find(params[:id])
+
+    if @track.update_attributes track_params
+      redirect_to action: :index
+    else
+      render :edit
+    end
+  end
+
+
   private
 
   def track_params

app/views/layouts/application.html.haml

@@ -12,6 +12,8 @@
           %ul
             %li
               = link_to 'Playlists', playlists_path
+            %li
+              = link_to 'Tracks', tracks_path
             %li
               = link_to 'Sign out', signout_path
 

app/views/tracks/_form.html.haml

@@ -0,0 +1,13 @@
+= form_for @track, html: { multipart: true } do |t|
+  %table
+    %tbody
+      %tr
+        %th= t.label :name
+        %td= t.text_field :name
+      - if @track.new_record?
+        %tr
+          %th= t.label :file
+          %td= t.file_field :file
+    %tfoot
+      %tr
+        %td= t.submit submit_text

app/views/tracks/edit.html.haml

@@ -0,0 +1 @@
+= render 'form', submit_text: 'Save'

app/views/tracks/index.html.haml

@@ -0,0 +1,6 @@
+= link_to 'Create track', new_track_path
+
+%ul
+  - @tracks.each do |p|
+    %li
+      = link_to p.name, track_path(p)

app/views/tracks/new.html.haml

@@ -1,12 +1 @@
-= form_for @track, html: { multipart: true } do |t|
-  %table
-    %tbody
-      %tr
-        %th= t.label :name
-        %td= t.text_field :name
-      %tr
-        %th= t.label :file
-        %td= t.file_field :file
-    %tfoot
-      %tr
-        %td= t.submit 'Upload'
+= render 'form', submit_text: 'Upload'

app/views/tracks/show.html.haml

@@ -1,5 +1,9 @@
 %h1= @track.name
 
 - if @track.sound?
-  %audio{src: sound_path(@track.sound), controls: true, autoplay: true}
-    Your browser does not support the audio element
+  %p
+    %audio{src: sound_path(@track.sound), controls: true, autoplay: true}
+      Your browser does not support the audio element
+
+%p
+  = link_to 'Edit', edit_track_path(@track)