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_in view:

<p id="notice"><%= notice %></p>

However, the notice does not show up. Works perfect if I don't redirect in the controller:

flash.now[:notice] = 'Successfully checked in'
render action: 'check_in'

I need a redirect though... not just a rendering of that action. Can I have a flash notice after redirecting?

Milstone

Answer 1

Remove the .now. So just write:

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

The .now is specifically supposed to be used when you are just rendering and not redirecting. When redirecting, the .now is not to be used.

Cohabit

Perfect! thanks. It's making me wait 6 more minutes to accept the answer for some reason... – Milstone

Answer 2

redirect_to new_user_session_path, alert: "Invalid email or password"

in place of :alert you can use :notice

to display

Snaky

Answer 3

Or you can do it in one line.

redirect_to check_in_path, flash: {notice: "Successfully checked in"}

Karyokinesis

@JayEl-Kaake what ruby version are you using? – Karyokinesis

It was a while ago, so I'm not sure... I'll redact my comment since it looks like that should work. – Cupule

path, flash: {notice: ... seems like Rails 3, while path, alert: ... is Rails 4+ – Revocable

Nice solution, as it also allows different types of messages, e.g. flash: {success: "text"} – Epa

Answer 4

This will work too

redirect_to check_in_path, notice: 'Successfully checked in'

Local

Answer 5

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| %>
  <div class="alert alert-<%= key %>"><%= value %></div>
<% end %>

This will produce HTML like:

<div class="alert alert-success">It worked!</div>

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/

Willumsen

Answer 6

I had the same problem, and your question solved mine, because I had forgotten to include in the /check_in view:

<p id="notice"><%= notice %></p>

In the controller, just a single line:

redirect_to check_in_path, :notice => "Successfully checked in"             

Slothful

yours is a different problem. I had the <%= notice %> tag, just nothing was coming up – Milstone

Answer 7

If you redirect using action, action, and flash message must be passed as separate arguments.

    redirect_to({ action: 'show'}, notice: 'Successfully checked in')

Reference: https://api.rubyonrails.org/classes/ActionController/Redirecting.html#method-i-redirect_to

Maramarabel