fixes to ad code

app/models/advertisement.rb

@@ -25,11 +25,15 @@ class Advertisement < ActiveRecord::Base
   end
   
   def image_url
-    "/images/advertisements/#{file_name}"
+    "/images/advertisements/ads-#{date_prefix}/#{file_name}"
+  end
+  
+  def date_prefix
+    created_at.strftime("%Y%m%d")
   end
 
   def image_path
-    "#{Rails.root}/public/images/advertisements/#{file_name}"
+    "#{Danbooru.config.advertisement_path}/ads-#{date-prefix}/#{file_name}"
   end
   
   def file

config/danbooru_default_config.rb

@@ -87,6 +87,11 @@ module Danbooru
       nil
     end
     
+    # Where the ad banners are stored in the file system
+    def advertisement_path
+      nil
+    end
+    
     # List of memcached servers
     def memcached_servers
       %w(localhost:11211)

config/deploy.rb

@@ -50,6 +50,12 @@ namespace :data do
   task :link_directories do
     run "rm -f #{release_path}/public/data"
     run "ln -s #{deploy_to}/shared/data #{release_path}/public/data"
+    
+    run "rm -f #{release_path}/public/ssd"
+    run "ln -s /mnt/ssd#{release_path}/public #{release_path}/public/ssd"
+    
+    run "rm -f #{release_path}/public/images/advertisements"
+    run "ln -s #{deploy_to}/shared/advertisements #{release_path}/public/images/advertisements"
   end
 end