ruby on rails 4 中利用 remote：true 实现 ajax ，小记

_form.html.erb

<%= form_for @post, :remote => true do |f| %>
  <div class="field">
    <%= f.label :title %><br />
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :content %><br />
    <%= f.number_field :content %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %><%= form_for @post, :remote