Ruby on Rails 的近期活动 [英] Recent Activities in Ruby on Rails

问题描述

实现 StackOverflow 风格的近期活动"页面的最佳方式是什么?

What is the best way to implement a StackOverflow-style Recent Activities page?

我有一个包含用户照片的图库，我希望在其他用户对他们的照片发表评论或投票时通知他们.

I have a Gallery with user's photos and I want them to be notified when other users comment or vote their photos.

我应该创建一个包含最近活动的新表(每当用户发表评论或投票时更新)还是应该简单地使用 MySQL 查询?

Should I create a new table which contains recent activities (updated whenever a user posts a comment or votes) or should I simply use a MySQL query?

推荐答案

简短的回答是:视情况而定.如果您只需要最近的活动并且不需要跟踪活动或完整的活动提要"功能，那么 SQL 是您的最佳选择.但是如果您认为需要做一个完整的活动提要类型的事情，您可以为其创建一个模型.

The short answer is : it depends. If you only need most recent activities and don't need to keep track of activities, or a full 'activity feed' feature, SQL is the way to go. but if you see the need to do a full activity feed kind thing, You can create a model for it.

我们最近在我们的项目上做了一个活动流.这是我们如何建模

We did a activity stream recently on our project. Here is how we modeled it

Class Activity
   belongs_to :user_activities # all the people that cares about the activity
   belongs_to :actor, class_name='user' # the actor that cause the activity

   belongs_to :target, :polymorphic => true # the activity target(e.g. if you vote an answer, the target can be the answer )
   belongs_to :subtarget, :polymorphic => true # the  we added this later since we feel the need for a secondary target, e.g if you rate an answer, target is your answer, secondary target is your rating. 

   def self.add(actor, activity_type, target, subtarget = nil)
     activity = Activity.new(:actor => actor, :activity_type => activity_type, :target => target, :subtarget => subtarget)
     activity.save!
     activity
   end 
end

在 answer_controller 我们做

in the answer_controller we do

Class AnswersController
    def create
        ...
        Activity.add(current_user, ActivityType::QUESTION_ANSWERED, @answer)
        ...
    end
end

要从用户那里获取最近的活动列表，我们会这样做

To get a recent activity list from a user we do

@activities = @user.activities

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