Flash notice with redirect_to is broken in rails

I updated to Rails 2.3.10, Rack 1.2.1 and now none of my flash messages are showing up. I found that during a redirect the notice is passed in like this

redirect_to(@user, :notice => "Sorry there was an error")

And in my view the flash hash is empty

<%= debug flash %>  
!map:ActionController::Flash::FlashHash {} 

But you can see the message in the controller. What gives?

        <%= debug controller.session %>
        session{:home_zip=>"94108", :session_id=>"xxx", :flash=>{:notice=>"Sorry there was an error"}, :user_credentials=>"1baf9c9c0423ce0151ec32开发者_如何学运维e24cc422f07309e4ba503eb4830635ecc115da217809997324374bb273b3fb792895c9741a8b8c9ea4267771a1bd149de5b9179ea0", :user_credentials_id=>22, :home_market_id=>11}
        Edit Profile    

Did you check the rails bug tracker? I still use the old fashioned setter flash[:notice] = message and it works fine, so it seems to be a redirect_to method problem.

https://rails.lighthouseapp.com/

Did you try redirect_to url, :flash => { :notice => "notice" }, as a work around?

The code below should work:

redirect_to(@user, {:notice => "Sorry there was an error"})

I'm guessing this is due to changes in Ruby and not in Rails, because it looks like a token parsing priority change in the compiler.

We just ran into this too. All our flash messages disappear with redirect, but not when set in the controller explicitly.

Does not work:

  def create
    if @obj.save
      flash[:notice] = "The #{cname.humanize.downcase} has been created."
      redirect_back_or_default redirect_url
    else
      render :action => 'new'
    end
  end

This does work:

 def show
    @user = current_user
    flash[:notice] = "Hello -- this will show up fine"
  end

This could be an issue with cookies. Long story short, cookies don't get if you redirect immediately afterwards. Assuming that Rails implements flash using cookies, the redirect is your problem.

Sources:

http://persistall.com/archive/2008/01/25/cookies--redirects--nightmares.aspx http://stackoverflow.com/questions/1621499/why-cant-i-set-a-cookie-and-redirect