more work

app/models/post.rb

@@ -8,7 +8,7 @@ class Post < ActiveRecord::Base
   before_save :create_tags
   before_save :update_tag_post_counts
   before_save :set_tag_counts
-  before_validation_on_create :initialize_uploader
+  before_validation :initialize_uploader, :on => :create
   belongs_to :updater, :class_name => "User"
   belongs_to :approver, :class_name => "User"
   belongs_to :parent, :class_name => "Post"
@@ -25,6 +25,7 @@ class Post < ActiveRecord::Base
   validate :validate_parent_does_not_have_a_parent
   attr_accessible :source, :rating, :tag_string, :old_tag_string, :last_noted_at
   scope :visible, lambda {|user| Danbooru.config.can_user_see_post_conditions(user)}
+  scope :commented_before, lambda {|date| where("last_commented_at < ?", date).order("last_commented_at DESC")}
   
   module FileMethods
     def delete_files

app/models/tag.rb

@@ -312,9 +312,8 @@ class Tag < ActiveRecord::Base
   
   module RelationMethods
     def update_related
-      calculator = RelatedTagCalculator.new
-      counts = calculator.calculate_from_sample(Danbooru.config.post_sample_size, name)
-      self.related_tags = calculator.convert_hash_to_string(counts)
+      counts = RelatedTagCalculator.calculate_from_sample(Danbooru.config.post_sample_size, name)
+      self.related_tags = RelatedTagCalculator.convert_hash_to_string(counts)
     end
     
     def update_related_if_outdated

app/models/upload.rb

@@ -7,8 +7,8 @@ class Upload < ActiveRecord::Base
   attr_accessor :file, :image_width, :image_height, :file_ext, :md5, :file_size
   belongs_to :uploader, :class_name => "User"
   belongs_to :post
-  before_validation_on_create :initialize_uploader
-  before_validation_on_create :initialize_status
+  before_validation :initialize_uploader, :on => :create
+  before_validation :initialize_status, :on => :create
   before_create :convert_cgi_file
   validate :uploader_is_not_limited