rails 3, how add a simple confirmation dialog when

问题:

what is the easiest way in rails 3 to to ask "Are you sure you want to do that?" when the user clicks on a link?

the link in this case overwrites some data with a new value. It's a simple link_to (GET) back to the same controller method, with a param[] added.

回答1:

EDIT:
<%= link_to "Do something", {:controller => "foo", :action => "bar"}, :confirm => "Are you sure you want to do that?" %>

回答2:

For those like me that came here but are on Rails 4/5:

link_to "Title", some_path, data: { confirm: "Are you sure?" }

The documentation

回答3:

There is a :confirm option:

link_to "Visit Other Site", "http://www.rubyonrails.org/", :confirm => "Are you sure?"
# => <a href="http://www.rubyonrails.org/" data-confirm="Are you sure?"">Visit Other Site</a>

You should have unobtrusive JavaScript driver like this one for JQuery. It's pretty simple to setup.

Details are in Rails API. For more details about UJS in Rails 3 you can follow this tutorial.