Rails 5使用Active Job呈现视图/部分主持人

Question

我是Rails的新手，我一直在尝试使用Active Job和Action Cable以及Presenter，并且我搜索遍布整个地方但无法计算出出来。

所以我的问题是，有任何方式来使用部分呈现器，并呈现在控制器之外（例如在ActiveJob中）？

下面

就是我想要什么来实现的：

我有一个消息系统（更像是电子邮件），与对话控制器和消息控制器。我想要实现的是当有人开始新的对话时，如果接收者在对话索引页面上，新的对话会自动附加到他们的索引视图（如在电子邮件中）使用ActionCable

所以，我的谈话。 RB

class Conversation < ApplicationRecord 
    has_many :messages, dependent: :destroy 
    after_create_commit { ConversationBroadcastJob.perform_later(self) } 

conversation_broadcast_job.rb

class ConversationBroadcastJob < ApplicationJob 
    queue_as :default 

     def perform(conversation) 
     ActionCable.server.broadcast "conversations:#{conversation.receiver_id}", 
           {convo: render_conversation(conversation)} 
     end 

     private 

     def render_conversation(conversation) 
     ConversationsController.render(partial: 'conversations/conversation', 
        locals: {conversation: conversation, var: 'not'}) 
     end 

    end 

和我_conversation.html.erb，我按照这个插曲使用的演示RailCast

<% present conversation do |conversation_presenter| %> 

    <div class="conversation <%=conversation_presenter.css(var)%>" 
     id="conversation_<%= conversation.id %>" 
     data-sender-id='<%= conversation_presenter.sender_id%>'> 

     <%=conversation_presenter.avatar%> 

     <div class="conversation-counterpart-name conversation-info truncate"> 
     <%=conversation_presenter.name(var) %> 
     </div> 


     <div class='conversation-subject conversation-info truncate'> 
     <%=link_to conversation_messages_path(conversation), 
             class:'link-gray truncate' do |n|%> 
      <%=conversation_presenter.subject %> 
      <div class='last-message truncate'> 
      <%=conversation_presenter.last_message%> 
      </div> 
     <% end %> 
     </div> 

     <div class="conversation-date conversation-info"> 
     <%=conversation_presenter.last_date%> 
     </div> 

    </div> 

    <% end %> 

本方法在ApplicationHelper

 def present(object, klass = nil) 
     klass ||= "#{object.class}Presenter".constantize 
     presenter = klass.new(object, self) 
     yield presenter if block_given? 
     presenter 
     end 

conversation_presenter.rb定义

class ConversationPresenter < BasePresenter 

     presents :conversation 
     delegate :subject, to: :conversation 


     def name(var) 
     if conversation.sender_id == var.id 
      conversation.receiver.name 
     else 
      conversation.sender.name 
     end 
     end 

     def last_date 
     if conversation.last_msg.nil? 
      conversation.render_date 
     else 
      conversation.last_msg.render_date 
     end 
     end 

     def last_message 
     conversation.last_msg.content unless conversation.last_msg.nil? 
     end 

     def avatar 
     h.image_tag('avatar.svg', size: 30, class:'conversation-  counterpart-avatar') 
     end 

     def css(var) 
     "unread" unless 
     conversation.read || (!conversation.last_msg.nil? &&  conversation.last_msg.wrote_by(var)) 
     end 

     def sender_id 
     if conversation.last_msg.nil? 
      conversation.sender_id 
     else 
      conversation.last_msg.author_id 
     end 
     end 

    end 

的问题就从这里开始，部分将不会呈现在ActiveJob，因为谈话主持人我假设。 所以我的问题是，有无论如何使用主持人与外部控制器渲染？

请让我知道如果您需要了解我的代码的另一部分

感谢任何信息！

Answer 1

尝试使用

ConversationsController.render - >ApplicationController.renderer.render

这是帮我一次。

def render_conversation(conversation) 
     renderer=ApplicationController.renderer.new 
     renderer.render(partial: 'conversations/conversation', 
        locals: {conversation: conversation, var: 'not'}) 

    end 

Answer 2

我用下面的代码足以从ActiveJob运行：

ApplicationController.new.render_to_string(
    :template => 'users/index', 
    :layout => 'my_layout', 
    :locals => { :@users => @users } 
) 

从https://makandracards.com/makandra/17751-render-a-view-from-a-model-in-rails