How to refresh particular page in rails

I have a dashboard page which needs to refresh after every 15 minutes. So how can I do this.

Here is my dashboard action from my controller

def dashboard
  @widgets = Widget.all
end

I have already added "Refresh" button on the page.

dashboard.html.haml

  = link_to "Refresh Page", "#", :id => "refresh-page"

dashboard.js

$("#refresh-page").click(function(){
        location.reload();
});

I also tried with

<meta http-equiv="refresh" content="300" />

and it is working fine page is refreshing after 5 minutes but it is applying to the all pages and this is causing problem.

So how can I refresh only particular page.