How to show flash message in Rails only once?

Question

Is it possible to show a flash message in rails only once? I mean, when I delete something, the flash drive says “Deleted (undo)”, and then, if I click and then the “Back back” button, the message is still there.

Answer 1

This is probably a common browser caching issue. You can force your browser to reload the page by clicking the back button, setting some headers without a cache.

You can try this approach: (found after a quick search on Google, you might want to dig deeper)

http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/

Answer 2

you can use

flash.now 

Here's the rule of thumb.

 In your controller, use flash when you're redirecting and flash.now when rendering.