来看看RJS的应用

我们首先要加上*.js文件，如修改application.rhtml:

<%= javascript_include_tag :defaults %>

然后给Review的create方法加上js格式的应答:

def create
  @review = Review.create!(params[:review])
  flash[:notice] = "Thank you for reviewing this product"
  respond_to do |format|
    format.html { redirect_to product_path(@review.product_id) }
    format.js
  end
end

我们在创建Review的页面中使用form_remote_for:

<!-- products/show.rhtml -->
<% form_remote_for :review, :url => reviews_path, :html => { :id => 'review_form' } do |f| %>
...
<% end %>

最后就是写create.rjs文件了:

page.insert_html :bottom, :reviews, :partial => 'review', : object => @review
page.replace_html :reviews_count, pluralize(@review.product,reviews.size, 'Review')
page[:review_form].reset
page.replace_html :notice, flash[:notice]
flash.discard

没多大新意，学习RJS看<<RJS Templates for Rails>>即可