Node.js监听MongoDB的变化 [英] Node.js listen to MongoDB change

问题描述

Node.js是否可以侦听MongoDB集合中特定数据的更改，并在发生更改时触发事件?

Is there a way for Node.js to listen to a change in a particular data in a collection of MongoDB, and fire an event if a change happens?

推荐答案

MongoDB现在显然支持触发器和监视功能，此答案已过时.

MongoDB apparently now supports triggers and watch, this answer is outdated.

[原始] ，我相信您正在寻找数据库触发器.

[Original] I believe you are looking for a database trigger.

不幸的是，MongoDB还不支持它们，所以我认为您不能直接从数据库中监听更改.您需要设置某种通知系统(例如pub/sub)，以便在收藏集发生更改时提醒感兴趣的参与者.

Unfortunately, MongoDB has no support for them yet, so I don't think you can listen for changes directly from the database. You'll need to setup some sort of notification system (e.g. pub/sub) that alerts interested parties when a collection has changed.

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