On-boarding a specialized broadcast method in the channel itself

comments_channel.rb

# Channel
class CommentsChannel < ApplicationCable::Channel
  def self.broadcast_comment(comment)
    broadcast_to comment.message, comment: CommentsController.render(
      partial: 'comments/comment', locals: { comment: comment }
    )
  end

  def follow(data)
    stop_all_streams
    stream_for current_user.account.messages.find(data['message_id'])
  rescue ActiveRecord::RecordNotFound
    reject
  end

  def unfollow
    stop_all_streams
  end
end

# Comment
class Comment < ApplicationRecord
  belongs_to :message
  
  after_create_commit -> { CommentsChannel.broadcast_comment(self) }
end