Question

I am using Ruby on Rails 3.2.2 and I would like to know how to retrieve the URL of the current browsed Web page in my application and to add to it some query parameter. That is, given a user is browsing the page http://www.my_application_name.org/articles/2, I would like to “build” something like link_to http://www.my_application_name.org/articles/2?param1=abc&param2=efg.

How can / should / could I make that?

Answer 1

You can use the url_for method and pass a ruby hash to add query parameters to current URL. For example,

<%= link_to 'Current URL with query params', url_for(param1: 'abc', param2: 'efg') %>

That should work.

If you want to get the current URL with host, port etc., you can use the request object to construct one as shown below.

<%= "http://#{request.host}:#{request.port.to_s+request.fullpath}" %>