Rails的功勳寶石，如何顯示聲譽的時間表改變

Question

我使用merit gem鋼軌，並想擁有的聲譽變化的時間表，贏得徽章等。例如

• +1 22Feb PostTitle投了起來
• +3 22Feb郵政標題收藏
• -1 22Feb PostTitle投了下來......等等。

基礎上的自述，我創建了以下內容：

配置/初始化/ merit.rb

config.add_observer 'ReputationChangeObserver' 

reputation_change_observer.rb

class ReputationChangeObserver 
    def update(changed_data) 
    # `changed_data[:description]` holds information on what changed 
    # badges granted or removed, points changed. 

    # `changed_data[:merit_object]` reputation related object created by merit. 
    # It responds to `sash_id` and `sash`. From there you can get to your 
    # application object that had it's reputation changed, for example: 
    # sash_id = changed_data[:merit_object].sash_id 
    # User.where(sash_id: sash_id).first 

    # You may use this to fill a timeline with notifications for users, send 
    # emails, etc. 

    end 
end 

問題， 接下來是什麼？我如何使用觀察者顯示current_user.changed_data的時間表？

Answer 1

API似乎現在有點不舒服，反正這裏的示例代碼，在當前的功德主（1515c6463f92aaace6298015c0f8e70064885779）工作原理：

class ReputationChangeObserver 
    def update(changed_data) 
    # description will be something like: 
    # granted 5 points 
    # granted just-registered badge 
    # removed autobiographer badge 
    description = changed_data[:description] 

    # If user is your meritable model, you can grab it like: 
    if changed_data[:merit_object] 
     sash_id = changed_data[:merit_object].sash_id 
     user = User.where(sash_id: sash_id).first 
    end 

    # To know where and when it happened: 
    merit_action = Merit::Action.find changed_data[:merit_action_id] 
    controller = merit_action.target_model 
    action = merit_action.action_method 
    when = merit_action.created_at 

    # From here on, you can create a new Notification assuming that's an 
    # ActiveRecord Model in your app, send an email, etc. For example: 
    Notification.create(
     user: user, 
     what: description, 
     where: "#{controller}##{action}", 
     when: when) 
    end 
end 

編輯：請注意，因爲這個答案是API發生了變化，看到https://github.com/tute/merit#getting-notifications。