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我正在开发一个 ror 网络，我试图 ajaxing 评论。网络上有带有评论的品牌和产品。我首先尝试 ajaxing 品牌的评论。

品牌型号

class Brand < ActiveRecord::Base
  attr_accessible :name
  has_many :products, :dependent => :destroy
  has_many :comments, :dependent => :destroy

  validates :name, :presence => true
end

评论的模型

class Comment < ActiveRecord::Base
  attr_accessible :body, :brand_id, :product_id, :user_id
  belongs_to :brand
  belongs_to :product

  validates :brand, :presence => {:unless => :product_id?, :message => "The comment must belongs to a brand or product"}
  validates :product, :presence => {:unless => :brand_id?, :message => "The comment must belongs to a brand or product"}
  validates :body, :presence => true
end

评论控制器创建

  def create
    @comment = Comment.new(params[:comment])
    @brand = Brand.find(params[:comment][:brand_id])

    respond_to do |format|
      if @comment.save
        @comments = @comment.brand.comments
        format.html { redirect_to @brand, notice: 'Comment was successfully created.' }
        format.json { render json: @comment, status: :created, location: @comment }
        format.js { render @brand}
      else
        format.html { render action: "new" }
        format.json { render json: @comment.errors, status: :unprocessable_entity }
      end
    end
  end

意见/品牌/_comments

<div class="well">
  <%= simple_format comments.body %>
  <%= link_to 'Edit', edit_comment_path(comments), :class => 'btn btn-mini btn-success' %>
  <%= link_to 'Destroy', comment_path(comments), :method => :delete, :data => {:confirm => 'Are you sure?'}, :class => 'btn btn-mini btn-danger' %>
</div>

意见/评论/create.js.rjs

$("#comments").html("<%= escape_javascript(render :partial => "comments", :collections => @comments) %>");

浏览量/品牌/展示

<h2>Comments</h2>
<div id="comments">
  <%= render :partial => "comments", :collection => @comments %>
</div>
<p></p>

<div id="comment-form">
  <%= form_for @comment, :remote => true do |f| %>
    <%= f.hidden_field :brand_id %>
    <div class="field">
      <%= f.text_area :body, :size => "25x5"%>
    </div>
    <div class="field">
      <%= f.submit 'Enviar comentario', :class => 'btn btn-success' %>
    </div>
  <% end  %>  
</div>

但是当我创建一个新产品时，页面被重新加载。真的很谢谢你！

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