Question

我是初学者。在我的ror应用程序中，我使用了一个字段的scaffold函数，我只需添加一个复选框功能。现在我尝试选择多个复选框（记录）并从表中删除该记录。当我单击删除按钮时，我收到了路由错误。请帮我纠正我的错误。

这是我的Controller.rb文件：

class MessagesController < ApplicationController
  before_action :set_message, only: [:show, :edit, :update, :destroy]

  # GET /messages
  # GET /messages.json
  def index
    @messages = Message.all
  end

  # GET /messages/1
  # GET /messages/1.json
  def show
     # @message = Message.find(params[:id])
  end

  # GET /messages/new
  def new
    @message = Message.new
  end

  # GET /messages/1/edit
  def edit
     # @message = Message.find(params[:id])
  end

  # POST /messages
  # POST /messages.json
  def create
    @message = Message.new(message_params)

    respond_to do |format|
      if @message.save
        format.html { redirect_to @message, notice: 'Message was successfully created.' }
        format.json { render :show, status: :created, location: @message }
      else
        format.html { render :new }
        format.json { render json: @message.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /messages/1
  # PATCH/PUT /messages/1.json
  def update
    respond_to do |format|
      if @message.update(message_params)
        format.html { redirect_to @message, notice: 'Message was successfully updated.' }
        format.json { render :show, status: :ok, location: @message }
      else
        format.html { render :edit }
        format.json { render json: @message.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /messages/1
  # DELETE /messages/1.json
  def destroy
    @message.destroy
      respond_to do |format|
      format.html { redirect_to messages_url, notice: 'Message was successfully destroyed.' }
      format.json { head :no_content }
    end
  end
private
    # Use callbacks to share common setup or constraints between actions.
    def set_message
      @message = Message.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def message_params
      params.require(:message).permit(:content)
    end
end

这是index.html.erb文件：

<p id="notice"><%= notice %></p>

<h1>Messages</h1>

<table>
  <thead>
    <tr>
      <th>Content</th>
      <th colspan="3"></th>
    </tr>
  </thead>

  <tbody>

    <% @messages.each do |message| %>
      <tr>
    <%= form_tag messages_path, :method => 'delete' do %>
        <td><%= check_box_tag "message_ids[]", message.id %></td>
        <td><%= message.content %></td>
        <td><%= link_to 'Show', message %></td>
        <td><%= link_to 'Edit', edit_message_path(message) %></td>
       <!--  <td><%= link_to 'Destroy', message, method: :delete, data: { confirm: 'Are you sure?' } %></td> -->
      </tr>
    <% end %>     
  </tbody>
  <% end %>
  <%= button_to 'Delete', messages_path %>
</table>

<br>
<%= link_to  'New Message', new_message_path %> 
</br>

My Routes.rb文件：

Rails.application.routes.draw do
  resources :messages do
    collection {post :destroy}      
  end
  root to: "messages#index"
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

错误显示：

路由错误没有路由匹配[DELETE]“/ messages”

Answer 1

：）

你可以像这样编辑routes.rb：

resources :message

而不是你的：

  resources :messages do
    collection {post :destroy}      
  end

用于销毁的HTTP方法是“DELETE”，而不是“POST”。

如果你运行'rails routes'，你必须看到如下行：

DELETE /messages/:id(.:format)

谢谢：）

如何使用ror中的复选框删除多条记录？

1 个答案: