Flash message in redirect not working

Question

I have the following in my controller:

redirect_to signin_path, :notice => \"The email is already registered\"

In my view I have

Answer 1

simple, but effective:

modify ApplicationController < ActionController::Base as follows:

alias :std_redirect_to :redirect_to
def redirect_to(*args)
   flash.keep
   std_redirect_to *args
end