render :update on Rails 3.1.0 gives me Missing Template update

I'm working with rails 3.1.0 and this is my first application on 3.1.0

I have a remote link:

link_to "my link",{:controller=>"my_controller",:action=>"my_action"},:remote=>true

and in my_controller I have

def my_action
    @data = Data.all
    render :update do |page|
        page.replace_html "show_data",:partial=>"data_partial"
    end
end

but then in the log I get an error

ActionView::MissingTemplate (Missing template my_controller/update...

and I was checking at this post

http://wowkhmer.com/2011/09/19/unobtrusive-ajax-with-rails-31/

do I really need to use a coffee script o开发者_如何学Pythonr a js.jrs to do this thing ??

Javascript integration doesn't work this way anymore. render :update ... tries to render the update action, which doesn't have an associated template. You need to move that out of the controller and into the view code, in app/views/my_controller/my_action.js.erb:

$("show_data").update("<%= escape_javascript(render :data_partial) %>");