this is great, thanks!
Though… I had a problem starting it cause s.tag_with(”hello”) sends String and .uniq brakes there… I solved this relocating .split() to tag_with method:

def tag_with(list)
list = list.split(’ ‘)
list.uniq.each do |t|
Tag.find_or_create_by_name(t.downcase).on(self)
end
end

…and is cleaner, also…