add indexes for better performance

app/models/content_type.rb

@@ -19,6 +19,9 @@ class ContentType
     end
   end
 
+  ## indexes ##
+  index [[:site_id, Mongo::ASCENDING], [:slug, Mongo::ASCENDING]]
+
   ## callbacks ##
   before_validation :normalize_slug
   before_save :set_default_values

app/models/page.rb

@@ -20,6 +20,11 @@ class Page
   ## associations ##
   referenced_in :site
 
+  ## indexes ##
+  index :site_id
+  index :parent_id
+  index [[:fullpath, Mongo::ASCENDING], [:site_id, Mongo::ASCENDING]]
+
   ## callbacks ##
   before_validation :normalize_slug
   before_save { |p| p.fullpath = p.fullpath(true) }

app/models/site.rb

@@ -17,6 +17,9 @@ class Site
   references_many :content_types, :dependent => :destroy
   embeds_many :memberships
 
+  ## indexes
+  index :domains
+
   ## validations ##
   validates_presence_of     :name, :subdomain
   validates_uniqueness_of   :subdomain

app/models/theme_asset.rb

@@ -17,6 +17,10 @@ class ThemeAsset
   ## associations ##
   referenced_in :site
 
+  ## indexes ##
+  index :site_id
+  index [[:content_type, Mongo::ASCENDING], [:slug, Mongo::ASCENDING], [:site_id, Mongo::ASCENDING]]
+
   ## callbacks ##
   before_validation :sanitize_slug
   before_validation :store_plain_text