基于其他字段的DynamoDB更新

发布于 2025-01-25 05:55:54 字数 497 浏览 3 评论 0原文

目前，我有一个帖子表，该表存储喜欢和 puntriity ，我基本上想更改 Puntriity puminity 字段，取决于此喜欢字段，例如：

if (likes > 100) popularity = 3
else if (likes > 50) popularity = 2
else if (likes > 10) popularity = 1
else popularity = 0

PURINTIOS（0）意味着该帖子是新的，而受欢迎程度（3）帖子是用户在探索页面上看到的最多的帖子。

现在，我需要获取每篇文章以获取他们的总喜欢，然后致电其 Pumority 的更新。有没有办法在一个单个更新功能中执行此操作，而无需事先获取帖子？

原文

Currently I have a posts table which stores likes and popularity, basically I want to change the popularity field depending on this likes field, such as:

if (likes > 100) popularity = 3
else if (likes > 50) popularity = 2
else if (likes > 10) popularity = 1
else popularity = 0

Popularity(0) means the post is new, whereas popularity(3) posts are the ones users see the most on their explore page.

Right now I need to fetch each post to get their total likes and then call an update for its popularity. Is there a way to do this in one single update function without fetching the post beforehand?

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