无法在Rails多态注释中实现Destroy，ActiveRecord

Question

我正在构建一个具有一些多态关系的Rails应用程序，但是我在实现销毁操作时遇到了麻烦。 Comment表是多态表，Subject has_many :comments和profile has_many :comments。我现在正努力从主题节目页面删除评论（基本上是一个论坛）。我创建了一个edit_comment_path并可以通过注释控制器成功编辑和更新注释，但是当我尝试删除时，@comment = Comment.find(params[:id])它一直在寻找Subject.id而不是Comment.id？删除链接似乎是正确的，所以我有点困惑。请参阅下面的代码。任何建议或改进也将不胜感激！

视图/评论/ _comment.html.erb

<% commentable.comments.each do |comment| %>
  <div>
    <hr>
    <% if commentable == @subject %>
      <p><%= comment.body %>  |  Posted by <%= comment.user.email %>, <%= time_ago_in_words(comment.created_at) + ' ago' %></p>

      <% if comment.user == current_user %>
        <%= link_to "Edit", edit_comment_path(comment, subject: 'subject') %>
        <%= link_to "Delete", comment_path, method: :delete %>
      <% end %>
    <% else %>
      <p><<%= comment.title %></p>
      <p><%= comment.body %> </p>
    <% end %>
  </div>
<% end %>

comments_controller.rb

class CommentsController < ApplicationController

  def show
    @comment = Comment.find(params[:id])
  end

  def create
    @comment = @commentable.comments.new(comment_params)
    @comment.user_id = current_user.id
    if @comment.save
      redirect_to @commentable, notice: "Successfully Posted!"
    end
  end

  def edit
    @comment = Comment.find(params[:id])
  end

  def update
    @comment = Comment.find(params[:id])
    if @comment.update(comment_params)
      redirect_to @comment.commentable, notice: "Comment was updated."
    end
  end

  def destroy
    @comment = Comment.find(params[:id])
  end

  private
  def comment_params
    params.require(:comment).permit(:title, :body)
  end
end

视图/主题/ show.html.erb

<h1><%= @subject.title %></h1>
<p>Created by: <%= @subject.user.email %>, <%= time_ago_in_words(@subject.created_at) + ' ago' %></p>


<%= render partial: 'comments/comment', locals: {commentable: @subject} %>
<%= render partial: 'comments/form', locals: {commentable: @subject} %>

配置/ routes.rb中

Rails.application.routes.draw do
  resources :locations, only: [:show, :destroy, :edit, :update]
  resources :comments, only: [:show, :edit, :update, :destroy]

  resources :subjects, only: [:index, :show] do
    resources :comments, module: :subjects
  end
  resources :profiles do
    resources :subjects, module: :profiles
    resources :locations, module: :profiles
    resources :comments, module: :profiles
  end
  resource :session, only: [:new, :create, :destroy]
  resources :users, only: [:new, :create, :show]
  root "home#index"

end

非常感谢任何反馈

Answer 1

从快速浏览看起来像

<%= link_to "Delete", comment_path, method: :delete %>

应该是：

<%= link_to "Delete", comment_path(comment), method: :delete %>

我认为问题在于，params[:id]传递给您的评论#stroy是主体的ID而不是评论的ID

此外，您的destroy方法应该类似于：

def destroy
    comment = Comment.find(params[:id])
    comment.destroy
    redirect_to somewhere
end