gistfile1.rb

# Create new comment
Comment.create( :author => "sacha", :message => "toto", :recipe => r)
# Ya plus simple
r.comments.create author: 'sacha', message: 'toto'
# Normalement ca devrait pas poser de problemes de mass assignment ca

def get_name_for_user user
  user
end

r.comments.create author: get_name_for_user('sacha'), message: 'toto'