How to display a Rails flash notice upon redirect?

Question

I have the following code in a Rails controller:

flash.now[:notice] = \'Successfully checked in\'
redirect_to check_in_path

Then in the /check_

Answer 1

If you are using Bootstrap, this will display a nicely-formatted flash message on the page that's the target of your redirect.

In your controller:

if my_success_condition
  flash[:success] = 'It worked!'
else
  flash[:warning] = 'Something went wrong.'
end
redirect_to myroute_path

In your view:

<% flash.each do |key, value| %>
  
<%= value %>
<% end %>

This will produce HTML like:

It worked!

For available Bootstrap alert styles, see: http://getbootstrap.com/docs/4.0/components/alerts/

Reference: https://agilewarrior.wordpress.com/2014/04/26/how-to-add-a-flash-message-to-your-rails-page/