Ajax on Rails 28-Nov-18
Ajax in .rhtml In the <head> section of your .rhtml page, do: <%= javascript_include_tag "prototype" %> The above code adds several files to your .rhtml page Included is JavascriptHelper, which lets you write Ruby code in place of Javascript code Here’s a simple .rhtml page: <%= link_to_remote("Do the Ajax thing", :update => 'mydiv', :url => { :action => :say_hello }) %> <div id="mydiv">This text will be changed</div>
Ajax on the server side The code on the preceding slide will call a method named say_hello when the link is clicked, so here it is: def say_hello render(:layout => false) end We also need a corresponding say_hello.rhtml file: <em>Hello from Ajax!</em> (Session id is <%= session.session_id %>)
Results Before clicking the link: Do the Ajax thing This text will be changed After clicking the link: Do the Ajax thing Hello from Ajax! (Session ID is d633a8cd4416dfc7253)
The End Example from: Agile Web Development with Rails by Dave Thomas and David Heinemeier Hansson