before_filter :authenticate_user, :only => [:new, :create, :edit, :update, :destroy]
before_filter :authenticate_artist, :only => [:edit, :update, :destroy]
else
before_filter :authenticate_user, :only => [:new, :create, :edit, :update, :destroy]
before_filter :authenticate_artist, :only => [:edit, :update, :destroy]
else