Question

我正在使用Rails 5进行即时评论。使用Rails * .js.erb，这对于这个规模的项目来说很舒服。还可以使用ActionCable向用户提供新注释。问题是我希望ActionCable将呈现的comments / _comment.html.haml直接发送到客户端以在浏览器中评估此代码。在一般情况下，它是完全适合的。但是在评论的erb模板中我必须处理current_user以添加删除链接if current_user.admin？问题是当我调用CommentsChannel.broadcast_to并渲染_comment.html.haml渲染器时现在不是current_user。

问题是我如何使用此订阅中的当前用户呈现_comment.html.haml并将其提交给当前用户定义的每个单独订阅？

Devise用于身份验证。

评论/ _comment.html.haml

%div[comment]
  .details
    %span.author= comment.user.email
    %span.time= l comment.created_at, format: :short
  = comment.body
  = link_to t('common.reply'), comment, class: 'reply-link'
  = link_to t('common.delete'), comment, method: :delete, remote: true if current_user.admin?
  = render 'comments/form', comment: comment.commentable.comment_threads.build, parent: comment

  - if comment.children.any?
    .child-comments
      = render comment.children.sort_by { |c| c.created_at }.reverse

application_cable / connection.rb

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user

    def connect
      self.current_user = find_verified_user
    end

    def find_verified_user
      if verified_user = env['warden'].user
        verified_user
      else
        reject_unauthorized_connection
      end
    end
  end
end

broadcast_comment_job.rb

class BroadcastCommentJob < ApplicationJob
  queue_as :default

  def perform(comment)
    CommentsChannel.broadcast_to \
      comment.commentable, 
      comment: render_comment(comment)
  end

  private

  def render_comment(comment)
    CommentsController.render(partial: 'comment', locals: { comment: comment })
  end

end

comment.rb

class Comment < ActiveRecord::Base
  ...
  after_create_commit { BroadcastCommentJob.perform_now(self) }
  ...
end

使用current_user自定义ActionCable通道提交

0 个答案: