SJR pattern.markdown

0. First-use of the message template

<% renders messages/_message.html.erb %>
<%= render @messages %>

1. Form submitting via Ajax

<%= form_for @project.messages.new, remote: true do |form| %>
  ...
  <%= form.submit "Send message" %>
<% end %>

2. Server creates the model object

class MessagesController < ActionController::Base
  def create
    @post = @project.messages.create!(message_params)

    respond_to do |format|
      format.html { redirect_to @message } # no js fallback
      format.js   # just renders messages/show.js.erb
    end
  end
end

3. Server generates a JavaScript view

<%# renders messages/_message.html.erb %>
$('#messages').prepend('<%=j render @message %>');
$('#<%= dom_id @message %>').highlight();

4. Automatic evaluation of response