improve closet performance by caching item link

app/models/item.rb

@@ -1,5 +1,3 @@
-# requires item sweeper at bottom
-
 class Item < ActiveRecord::Base
   include PrettyParam
 
@@ -836,6 +834,3 @@ class Item < ActiveRecord::Base
 
   class SearchError < ArgumentError;end
 end
-
-require 'item_sweeper'
-

app/models/item_observer.rb

@@ -0,0 +1,17 @@
+class ItemObserver < ActionController::Caching::Sweeper
+  def after_update(item)
+    Rails.logger.debug "Item #{item.id} was just updated"
+    expire_cache_for(item)
+  end
+
+  def after_destroy(item)
+    Rails.logger.debug "Item #{item.id} was just destroyed"
+    expire_cache_for(item)
+  end
+
+  private
+  
+  def expire_cache_for(item)
+    ActionController::Base.new.expire_fragment("items/#{item.id}#item_link_partial")
+  end
+end

app/models/item_sweeper.rb

@@ -1,26 +0,0 @@
-class ItemSweeper < ActionController::Caching::Sweeper
-  observe Item
-
-  def after_update(item)
-    expire_cache_for(item)
-  end
-
-  def after_destroy(item)
-    expire_cache_for(item)
-  end
-
-  private
-  def expire_cache_for(item)
-    options = {:controller => 'items', :action => 'show', :id => item.id}
-    expire_action(options)
-  end
-  
-  def expire_action(options)
-    if @controller
-      super
-    elsif LocalImpressHost
-      @tmp_controller ||= SweeperController.new
-      @tmp_controller.expire_action_proxy(options.dup)
-    end
-  end
-end

app/views/closet_lists/_closet_list.html.haml

@@ -1,13 +1,13 @@
-.closet-list{'data-id' => closet_list.id, 'data-hangers-count' => closet_list.hangers.count, :id => "closet-list-#{closet_list.id}"}
+.closet-list{'data-id' => closet_list.id, 'data-hangers-count' => closet_list.hangers.size, :id => "closet-list-#{closet_list.id}"}
   %header
     - if show_controls
-      = form_for [closet_list.user, closet_list], :html => {:class => 'visibility-form'} do |f|
+      = form_for [current_user, closet_list], :html => {:class => 'visibility-form'} do |f|
         = f.select :visibility, closet_visibility_choices(:human_name)
         = f.submit "Save"
         = closet_visibility_descriptions('items in this list')
       .closet-list-controls
-        = link_to 'Edit', edit_user_closet_list_path(closet_list.user, closet_list)
-        = form_tag user_closet_list_path(closet_list.user, closet_list), :method => 'delete' do
+        = link_to 'Edit', edit_user_closet_list_path(closet_list.user_id, closet_list)
+        = form_tag user_closet_list_path(closet_list.user_id, closet_list), :method => 'delete' do
           = submit_tag 'Delete', :confirm => closet_list_delete_confirmation(closet_list)
     %h4= closet_list.name
 

app/views/items/_item.html.haml

@@ -1,3 +1,3 @@
 .object
   = render :partial => 'items/item_link', :locals => {:item => item}
-
+  = closeted_icons_for(item)

app/views/items/_item_link.html.haml

@@ -1,6 +1,6 @@
-= link_to item_path(item, :q => @query) do
-  = image_tag item.thumbnail_url, :alt => item.description, :title => item.description
-  %span.name= item.name
-  = nc_icon_for(item)
-  = closeted_icons_for(item)
+- cache "items/#{item.id}#item_link_partial" do
+  = link_to item_path(item, :q => @query) do
+    = image_tag item.thumbnail_url, :alt => item.description, :title => item.description
+    %span.name= item.name
+    = nc_icon_for(item)
 

config/application.rb

@@ -20,7 +20,7 @@ module OpenneoImpressItems
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
     # Activate observers that should always be running
-    config.active_record.observers = :item_sweeper, :user_sweeper
+    config.active_record.observers = :item_observer, :user_sweeper
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.