在Ruby-on-Rails上，可以從控制器傳遞變量以通過response_to查看嗎？

Question

我要提交一條消息，然后顯示一條消息並打開一個彈出窗口。 郵件已正確保存在數據庫中，但未顯示該郵件，相反，我收到了此郵件

NoMethodError in Private::Conversations#create
Showing /var/www/appror/app/views/private/conversations/_open.js.erb where line #3 raised:
undefined method `id' for nil:NilClass`

該應用程序在

Rails version             5.2.2;
Ruby version              2.5.3-p105 (x86_64-linux);
RubyGems version          2.7.6;
Rack version              2.0.6

消息保存后，在控制器中

/app/channels/private/conversation_channel.rb

class Private::ConversationsController < ApplicationController    
    def create
        recipient_id = Post.find(params[:post_id]).user.id
        conversation = Private::Conversation.new(sender_id: current_user.id, recipient_id: recipient_id)
        if conversation.save

            respond_to do |format|
                format.js {render partial: 'posts/show/contact_user/message_form/success'}
        end
....
end

從

/app/views/posts/show/contact_user/message_form/_success.js.erb

它在哪里

<%= render 'private/conversations/open' %>

它應該顯示消息

/app/views/private/conversations/_open.js.erb

哪里

var conversation = $('body').find("[data-pconversation-id='" + 
                            "<%= @conversation.id %>" + 
                            "']");

通常，它應該前進並顯示消息和彈出窗口，但我卻收到了

NoMethodError in Private::Conversations#create
Showing /var/www/appror/app/views/private/conversations/_open.js.erb where line #3 raised:
undefined method `id' for nil:NilClass`

調試后，我發現<％= @conversation％>為空...因此，該錯誤是有意義的。 但是如何從控制器傳遞@conversatio到視圖？ 可以通過使用

respond_to do |format| format.js

？

謝謝！

編輯：

謝謝@max，的確是@conversation = ....解決了這個問題

Answer 1

您在控制器的對話變量中缺少@，並且變量超出范圍。 @conversation = Private::Conversation.new(sender_id: current_user.id, recipient_id: recipient_id