如何删除rails中的多个检查记录？

Question

我想出了如何为每一行显示复选框。 问题是我不知道如何编写 form_tag 和提交标签，以便使用 detele 操作将选中的行参数传递给 messages_controller。 以及在删除操作中写什么。

请帮帮我！

我的看法是

<table>
  <tr>
    <th>delete</th>
    <th>ID</th>
    <th>Read</th>
    <th>Date</th>
    <th>Sender</th>
    <th>Subject</th>
  </tr>


<% @messages.each do |m| %>
  <tr>
    <td><%= check_box_tag '', m.id, false, class: 'delete_multiple_checkbox', name: "conversations[]" %>
    <td><%= m.last_message.id %></td>
    <td><%= 'unread' if m.is_unread?(current_user) %></td>
    <td><%= m.last_message.created_at %></td>
    <td><%= m.last_sender.username %></td>
    <td><%= m.subject %></td>
 </tr>
<% end %>
</table>

和控制器应该是这样的（根据这里https://github.com/frodefi/rails-messaging/blob/master/app/controllers/messaging/messages_controller.rb）

def trash
  conversation = Conversation.find_by_id(params[:id])
  if conversation
    current_user.trash(conversation)
    flash[:notice] = "Message sent to trash."
  else
    conversations = Conversation.find(params[:conversations])
    conversations.each { |c| current_user.trash(c) }
    flash[:notice] = "Messages sent to trash."
  end
  redirect_to messages_path(box: params[:current_box])
end

路由.rb

Example::Application.routes.draw do



 root :to => "top#index" 
 devise_for :users, :controllers => { :registrations => "registrations" }

 get 'girls', :to => 'girls#index', :as => :user_root
 match '/girls/comment' => 'girls#comment', :via => :post
 get "girls/show"
 resources :girls
 resources :home

 devise_for :users do get 'logout' => 'devise/sessions#destroy' end

 resources :girls do 
   collection do
     get 'tag'
   end
 end


  resources :contacts
  resources :user_profiles

  match 'messages/new/:username', :to => 'messages#new'



  get "messages/sent"
  get "messages/trash"
  get "messages/received"
  get "messages/show"
  get "messages/trash"
  match '/messages/deliver' => 'messages#deliver', :via => :post


end

Answer 1

修改下面列出的语法以满足您的要求：

Model.where(:id => [1,2,3,4,5]).destroy_all

或

Model.where(id: params[:id]).destroy_all

Answer 2

您所要做的就是用 form_tag 包装整个消息呈现块，并在您喜欢的任何地方添加 submit_tag。我假设您的控制器是空白命名空间下的 MessagesController 并且操作是垃圾。请注意，如果您的控制器位于消息传递命名空间下，您可能需要将 :controller => :messages 更改为 :controller => 'messaging/messages'。

   <% form_tag :url => { :controller => :messages, :action => :trash}, :method => :delete do %>
      <% @messages.each do |m| %>
        <tr>
          <td><%= check_box_tag '', m.id, false, class: 'delete_multiple_checkbox', name: "conversations[]" %>
          <td><%= m.last_message.id %></td>
          <td><%= 'unread' if m.is_unread?(current_user) %></td>
          <td><%= m.last_message.created_at %></td>
          <td><%= m.last_sender.username %></td>
          <td><%= m.subject %></td>
       </tr>
      <% end %>
      <%= submit_tag "Trash All Checked" %>
    <% end %>

我还假设您的 routes.rb 接受指定路由的 HTTP DELETE 方法。您可以使用rake route | grep messages 进行检查并验证路由是否已设置。 如果不是，则必须添加：

resources :messages do
    collection do
         delete :trash
    end
end