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Add description of flash.now

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1 parent b38a803 commit 53f56966130f0a48589d3f06d85ca186fb84005f @toretore toretore committed with karmi Oct 10, 2008
Showing with 21 additions and 0 deletions.
  1. +21 −0 railties/doc/guides/actioncontroller/session.txt
@@ -162,3 +162,24 @@ class MainController < ApplicationController
end
------------------------------------------
+
+==== flash.now ====
+
+By default, adding values to the flash will make them available to the next request, but sometimes you may want to access those values in the same request. For example, if the `create` action fails to save a resource and you render the `new` template directly, that's not going to result in a new request, but you may still want to display a message using the flash. To do this, you can use `flash.now` in the same way you use the normal `flash`:
+
+[source, ruby]
+------------------------------------------
+class ClientsController < ApplicationController
+
+ def create
+ @client = Client.new(params[:client])
+ if @client.save
+ # ...
+ else
+ flash.now[:error] = "Could not save client"
+ render :action => "new"
+ end
+ end
+
+end
+------------------------------------------

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