This is plugin for easy creating unique slugs from other properties.

You need to have DataMapper model with property slug. To set slug just use before create hook with set_slug model method. This method takes the slug as parameter. Use String#to_slug to get this parameter if you need.

class Post
  include DataMapper::Resource
  is :sluggable
  property :title, String
  property :slug,  String, :key => true
  before :create do
    set_slug(self.title.to_slug)
  end
end

So what exactly set_slug does? It look for given slug, if not found than save it, let say as “foo-bar”. If found, than increase number of iteraction and tries it again with “foo-bar-2”.