如何正确地将参数传递给控制器​​？

Question

1. 从显示视图：我想将显示的消息ID传递给丢弃操作并废弃消息。

2. 从索引视图：我想将已检查邮件的ID传递给丢弃操作并立即将其全部删除。

但即使我检查多个并从索引视图提交，我也只能一次删除一条记录 如何使用相同的动作????

归档1和2

路线

  match 'messages/discard(/:id)' => 'messages#discard', :via => :post , :as => :discard_messages

索引视图

  <%= form_tag(:action => discard, :via => 'post') do %>   
   <% @messages.each do |m| %>
      <tr>
       <td><%= check_box_tag "id",m.id %></td>
       <td><%= m.last_message.id %></td>
       <td><%= 'unread' if m.is_unread?(current_user) %></td>
       <td><%= m.last_message.created_at.to_s(:jp) %></td>
       <td><%= m.last_sender.username %></td>
       <td><%= link_to m.subject, show_messages_path(:id => m, :breadcrumb => @box) %></td>
      </tr>
   <% end %>
   <%= submit_tag "discard", :class => 'btn' %>
  <% end %>

显示视图

<%= link_to 'Discard', discard_messages_path(@messages), :class => 'btn', :method => 'post'  %>

控制器

  def discard  
      conversation = Conversation.find_all_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 :back 
  end

Answer 1

在你的html中使用[]命名，这些rails将在params中作为数组提供

index.html.erb

<td><%= check_box_tag "message_id[]", m.id %></td>

控制器

# ...
else
  conversations = Conversation.where("id IN (?)", params[:message_id][])
  # ...

为了进一步简化操作，我会在您的操作中删除条件并创建两个单独的操作

路由

resource :messages do 
  member do
    post 'discard' # /messages/:id/discard
  end
  collection do
    post 'discard_all' # /messages/discard_all?message_id[]=1&message_id[]=22
  end
end