The
Palm
Civet

Posts tagged rails

rendering rails partials with ajax w/o a framework

ever wanted to quickly create a link in rails that, when clicked, dynamically renders a partial in a targeted element? accepting bonus points for being framework agnostic? throw this puppy in your application helper =>


  def remote_partial_link(*args)
    name         = args.first
    partial      = args.second
    target_id    = args.third
    html_options = args.fourth
    locals       = args.fifth
    if html_options
      html_options = html_options.stringify_keys
      tag_options = tag_options(html_options)
    else
      tag_options = nil
    end
    if locals
      p = render_to_string :partial => partial, :locals => locals
    else
      p = render_to_string :partial => partial
    end
    p = escape_javascript(p).gsub("\"","'")
    "<a onclick=\"document.getElementById('#{target_id}').innerHTML = '#{p}'\" "+
      "#{tag_options}>#{name}</a>"
  end

basically, its a bastardized version of rails built-in link_to helper. with it, in your views you can write =>


  <%= remote_partial_link("Add Link", "lists/link", "link-#{i}",
    { :class => "ajax" }, { :i => i }) %>

the only limitation is that these are generated on the page’s load, so it can’t account for any remote calls that happens after that. but that also makes this solution good for performance, since the script is baked inline to the element and ready to fire. the only other piece of set-up is making the render_to_string method accessible in your helpers from your application controller =>


  helper_method :render_to_string

compiling and sharing code, ideas, and tools for making better websites and applications.

by justin talbott {email me}

what is a palm civet?