Randomize "featured" and "other by user" lists

app/controllers/home_controller.rb

@@ -27,7 +27,7 @@ class HomeController < ApplicationController
   end
 
   def featured_asciicasts
-    asciicast_repository.latest_featured_limited(3).decorate
+    asciicast_repository.random_featured_limited(3).decorate
   end
 
   def asciicast_repository

app/decorators/asciicast_decorator.rb

@@ -58,7 +58,7 @@ class AsciicastDecorator < ApplicationDecorator
   def other_by_user
     if user
       AsciicastDecorator.decorate_collection(
-        user.asciicasts.where('id <> ?', model.id).limit(3)
+        user.asciicasts.where('id <> ?', model.id).order('RANDOM()').limit(3)
       )
     else
       []

app/models/asciicast.rb

@@ -19,9 +19,10 @@ class Asciicast < ActiveRecord::Base
 
   scope :featured, -> { where(featured: true) }
   scope :by_recency, -> { order("created_at DESC") }
+  scope :by_random, -> { order("RANDOM()") }
   scope :latest_limited, -> (n) { by_recency.limit(n).includes(:user) }
-  scope :latest_featured_limited, -> (n) {
-    featured.by_recency.limit(n).includes(:user)
+  scope :random_featured_limited, -> (n) {
+    featured.by_random.limit(n).includes(:user)
   }
 
   attr_accessible :title, :description, :time_compression