check if user has a new release note and notify him

Question

我想找到一种简单的方法来通知用户有关新发行说明的信息，而无需使用django-notifications或在数据库中的用户和发行说明表之间添加关系，使用类似标志的方法，一旦添加了新发行说明，该标识就会返回true，但是我不知道是否可以使用会话来检查用户是否已经看到发行说明。

Answer 1

Sessions are probably not a good solution for your problem:

1. Depending on your session backend, accessing sessions outside of a request is hard (DB backend) or downright impossible (cookie backend).
2. When a user logs out, the session is lost.
3. A user can have multiple sessions.

If you are fine with users seeing release notes multiple times, storing the date/id of the last release note seen in the session could work.

The most reliable approach is a ReleaseNoteHistory table where you store either the date of or a reference to the last release note the user has seen.