Problems getting notices

application.html.erb

<% flash.each do |name, message| %>
  <%= content_tag :div, message, :id => "flash_#{name}" %>
<% end %>

password_reset_controller.rb

def update
  @customer = Customer.find_by_reset_token!(params[:id])
  #redirect_to root_url, :notice => "Customer: #{@customer.to_s}"
end

update.html.erb

<%= @customer.attributes.to_s %>

OUTPUT:
#<Customer:0x1c78ba8> (Which is filled in)

welcome_controller.rb

def index
    @customer ||= Customer.find(session[:customer_id]) if session[:customer_id]
    unless session[:customer_id]
      redirect_to login_path
      return
    end
    
    unless @customer.authentication.login_count
      redirect_to signup_path
      return
    end
end

This isn't working mate.
I don't get why it isn't working