Mongodb获取文档在集合中的位置

Question

Is there a way to get a document's position relative to its collection based on one of its properties in Mongodb?

The use case is that I am building a leaderboard, but want to provide an easy way for the user to know their rank without having to scroll through all the entries.

Is there some mongoose schema magic or mongodb query that will help me easily get the position of a user based on their score?

Currently, my solution is to create an index on the score, query the entire collection and find the index of the user in the result.

Answer 1

Strictly speaking, this is not possible, as MongoDB does not store its documents in any certain order. Your current approach should be fine.

You're not the first one with this question: there's a feature request for this exact thing with a high priority.

https://jira.mongodb.org/browse/SERVER-4588