如何向帖子收到评论的用户发送通知？

使用我当前的代码，发表评论的用户会收到一条通知，告诉他们他们发表了评论。

发布受到评论的评估的人应该收到通知，通知他们有人对此发表了评论。

标准通知内容，但我哪里出错了？！

评论.rb

class Comment < ActiveRecord::Base
  after_create :create_notification
  has_many :notifications
  has_many :comment_likes   
  has_many :likers, through: :comment_likes, class_name: 'User', source: :liker
  belongs_to :habit
  belongs_to :quantified
  belongs_to :valuation
  belongs_to :goal
  belongs_to :user
  validates :user, presence: true

private

  def create_notification # This is definitely the issue I made a lot of attempts to fix it, but now it's even more confusing
    @valuation = Valuation.find_by(self.valuation_id)
    @comment = Comment.find_by(self.id)
    @user = User.find_by(@comment.user_id).id
      self.notifications.create(
        comment: self,
        valuation: self.valuation,
        user: self.user,
        read: false
      )
  end
end

通知.rb

class Notification < ActiveRecord::Base
  belongs_to :comment
  belongs_to :valuation
  belongs_to :user
end

通知控制器.rb

  def index
    @notifications = current_user.notifications
    @notifications.each do |notification|
      notification.update_attribute(:read, true) 
    end
  end

通知/索引

<%= link_to notification.user_id, user_path(Comment.find_by(notification.comment_id).user.id) %> commented on <%= link_to "your value", notification_valuation_path(notification, notification.valuation_id) %>

估价.rb

class Valuation < ActiveRecord::Base
    belongs_to :user
    has_many :activities
  acts_as_taggable
  has_many :combine_tags
  has_many :notifications
  validates :name, presence: true
    has_many :notes, as: :notable
    scope :publish, ->{ where(:conceal => false) }
    has_many :notes
  has_many :valuation_likes 
  has_many :likers, through: :valuation_likes, class_name: 'User', source: :liker
  has_many :comment_likes
    has_many :comments

  scope :randomize, -> do
      order('RANDOM()').
      take(1)
    end

    scope :top_25, -> do
      order('RANDOM()').
      limit(25)
    end
end

如果您需要进一步的信息，请告诉我解释或代码 http://evanamccullough.com/2014/11/ruby-on-rails-simple-notifications-system-tutorial/帮助你帮助我:-]

链接是我用过的教程。

我想你正在寻找这个：

def create_notification
    @valuation = Valuation.find_by(self.valuation_id)
    @comment = Comment.find_by(self.id)
    @user = User.find_by(@valuation.user_id).id
      self.notifications.create(
        comment: self,
        valuation: self.valuation,
        user:@valuation.user,
        read: false
      )
  end

对于通知索引，请尝试：

<%= link_to Comment.find_by(notification.comment_id).user.id, user_path(Comment.find_by(notification.comment_id).user.id) %> commented on <%= link_to "your value", notification_valuation_path(notification, notification.valuation_id) %>