next and previous record methods

next_previous_records.rb

# You need to call the next and previous records. Just put the following in your model.
# From http://snippets.dzone.com/posts/show/7163
def next
  self.class.find :first,
    :conditions => ["created_at > ? ",self.created_at],
    :order => "created_at DESC"
end
 
def previous
  self.class.find :first,
    :conditions => ["created_at < ? ",self.created_at],
    :order => "created_at DESC"
end