Wiki: base implemetation logic

app/models/wiki.rb

@@ -2,10 +2,9 @@ class Wiki < ActiveRecord::Base
   belongs_to :project
 
   validates :content, :title, :presence => true
-  validates :title, :length => 1..250,
-                    :uniqueness => {:scope => :project_id, :case_sensitive => false}
+  validates :title, :length => 1..250
 
-  before_save :set_slug
+  before_update :set_slug
 
 
   def to_param
@@ -17,4 +16,17 @@ class Wiki < ActiveRecord::Base
   def set_slug
     self.slug = self.title.parameterize
   end
+
+  class << self
+    def regenerate_from wiki
+      regenerated_field = [:slug, :content, :title]
+
+      new_wiki = Wiki.new
+      regenerated_field.each do |field|
+        new_wiki.send("#{field}=", wiki.send(field))
+      end
+      new_wiki
+    end
+
+  end
 end