Ruby on rails 4 Rails 4-所有嵌套的多态注释都显示在每个页面上，而不是单个页面上

我正在学习Rails并尝试创建一个带有嵌套多态注释的站点

我一直在关注本教程以及一些RailsCasts（262棵有祖先的树和154棵多态关联树）

我已经成功地创建了嵌套的多态注释（当我为每个注释检查rails控制台时）。然而，我遇到的问题是输出评论。它们都出现在每个资源的展示页面上，而不是相关的展示页面上。换句话说，所有的评论都显示在/videos/1和videos/2以及lessons/1和lessons/3上（每页都显示相同的评论）

我怀疑我的问题出在comments_helper.rb或/lib/commentable.rb文件中，但是我没有调试这个问题

路线 config/routes.rb

  devise_for :users

  resources :videos do
    resources :comments
  end

  resources :lessons do
    resources :comments
  end

控制器 app/controllers/comments\u controller.rb

class CommentsController < ApplicationController
  def new
    @parent_id = params.delete(:parent_id)
    @commentable = find_commentable
    @comment = Comment.new( :parent_id => @parent_id, 
                            :commentable_id => @commentable.id,
                            :commentable_type => @commentable.class.to_s)
  end

  def create
    @commentable = find_commentable
    @comment = @commentable.comments.build(comment_params)
    @comment.user_id = current_user.id
    if @comment.save
      flash[:notice] = "Successfully created comment."
      redirect_to @commentable
    else
      flash[:error] = "Error adding comment."
    end
  end

  private
  def find_commentable
    params.each do |name, value|
      if name =~ /(.+)_id$/
        return $1.classify.constantize.find(value)
      end
    end
    nil
  end

  def comment_params
    params.require(:comment).permit(:body, :parent_id, :commentable_id, :commentable_type)
  end

end

class LessonsController < ApplicationController
  include Commentable
...
end

class VideosController < ApplicationController
  include Commentable
...
end

解放党 /lib/commentable.rb

require 'active_support/concern'

module Commentable
  extend ActiveSupport::Concern

  included do
    before_filter :comments, :only => [:show]
  end

  def comments
    @commentable = find_commentable
    @comments = @commentable.comments.arrange(:order => :created_at)
    @comment = Comment.new
  end

  private

  def find_commentable
    return params[:controller].singularize.classify.constantize.find(params[:id])
  end

end

模式 意见 课程和视图show.html.erb

<div class="tab-pane" id="comments">
  <%= nested_comments @comments %>
  <%= render "comments/form" %>
</div>

<div class="tab-pane" id="comments">
    <%= nested_comments @lesson.comments %>
    <%= render "comments/form" %>
</div>

app/views/comments/_form.html.erb

<%= form_for [@commentable, @comment] do |f| %>
    <%= f.hidden_field :parent_id %>
    <p>
        <%= f.label :body, "New comment" %>
    </p>
    <%= f.text_area :body, :rows => 4 %>
    <p>
       <%= f.submit "Post Comment" %>
    </p>
<% end %>

4 %>

app/views/comments/_comment.html.erb

<div class="media-body">
  <h4 class="media-heading"><%= comment.user.username %></h4>
  <i>
    <%= comment.created_at.strftime('%b %d, %Y at %H:%M')  %>
  </i>
  <p>
    <%= simple_format comment.body %>
  </p>
  <div class="actions">
    <%= link_to "Reply", new_polymorphic_path([@commentable, Comment.new], :parent_id => comment) %>
  </div>
  <%= nested_comments comment.children %>
</div>

评论）%>

---

任何反馈或想法都将不胜感激。谢谢；）

找到了一个解决方案，但是现在子注释出现了两次

show.html.erb

<div class="tab-pane" id="comments">
  <%= nested_comments @comments %>
  <%= render "comments/form" %>
</div>

<div class="tab-pane" id="comments">
    <%= nested_comments @lesson.comments %>
    <%= render "comments/form" %>
</div>

<div class="tab-pane" id="comments">
  <%= nested_comments @comments %>
  <%= render "comments/form" %>
</div>

<%= form_for [@commentable, @comment] do |f| %>
    <%= f.hidden_field :parent_id %>
    <p>
        <%= f.label :body, "New comment" %>
    </p>
    <%= f.text_area :body, :rows => 4 %>
    <p>
       <%= f.submit "Post Comment" %>
    </p>
<% end %>

<div class="media-body">
  <h4 class="media-heading"><%= comment.user.username %></h4>
  <i>
    <%= comment.created_at.strftime('%b %d, %Y at %H:%M')  %>
  </i>
  <p>
    <%= simple_format comment.body %>
  </p>
  <div class="actions">
    <%= link_to "Reply", new_polymorphic_path([@commentable, Comment.new], :parent_id => comment) %>
  </div>
  <%= nested_comments comment.children %>
</div>

<div class="tab-pane" id="comments">
    <%= nested_comments @lesson.comments %>
    <%= render "comments/form" %>
</div>