Update Note to load notes in the right order

app/contexts/notes/load_context.rb

@@ -9,23 +9,24 @@ module Notes
 
       @notes = case target_type
                when "commit"
-                 then project.commit_notes(project.commit(target_id)).fresh.limit(20)
-               when "snippet"
-                 then  project.snippets.find(target_id).notes
-               when "wall"
-                 then project.common_notes.order("created_at DESC").fresh.limit(50)
+                 project.commit_notes(project.commit(target_id)).fresh.limit(20)
                when "issue"
-                 then project.issues.find(target_id).notes.inc_author.order("created_at DESC").limit(20)
+                 project.issues.find(target_id).notes.inc_author.fresh.limit(20)
                when "merge_request"
-                 then project.merge_requests.find(target_id).notes.inc_author.order("created_at DESC").limit(20)
+                 project.merge_requests.find(target_id).notes.inc_author.fresh.limit(20)
+               when "snippet"
+                 project.snippets.find(target_id).notes.fresh
+               when "wall"
+                 # this is the only case, where the order is DESC
+                 project.common_notes.order("created_at DESC").limit(50)
                when "wiki"
-                 then project.wikis.reverse.map {|w| w.notes.fresh }.flatten[0..20]
+                 project.wikis.reverse.map {|w| w.notes.fresh }.flatten[0..20]
                end
 
       @notes = if last_id
-                 @notes.where("id > ?", last_id)
+                 @notes.where("id < ?", last_id)
                elsif first_id
-                 @notes.where("id < ?", first_id)
+                 @notes.where("id > ?", first_id)
                else 
                  @notes
                end

app/models/note.rb

@@ -36,7 +36,7 @@ class Note < ActiveRecord::Base
   scope :today, where("created_at >= :date", date: Date.today)
   scope :last_week, where("created_at  >= :date", date: (Date.today - 7.days))
   scope :since, lambda { |day| where("created_at  >= :date", date: (day)) }
-  scope :fresh, order("created_at DESC")
+  scope :fresh, order("created_at ASC")
   scope :inc_author_project, includes(:project, :author)
   scope :inc_author, includes(:author)