具有自动增量的mongodb第二个ID字段 [英] mongodb second id field with auto increment

问题描述

我想在mongodb集合中有一个附加的ID字段.objectId非常适合获得唯一的ID，但是我需要为用户管理使用较短的ID.这些ID应该类似于 100001 ， 100002 等.是否可以通过自动递增获取这些信息?

I want to have an additional ID field in my mongodb collection. The objectId is perfect for get unique IDs, but I need shorter IDs for my user management. These IDs should look like 100001, 100002 and so on. Is it possible to get these by auto increment?

Thx

推荐答案

MongoDB没有自动递增功能.

MongoDB does not have an auto increment functionality.

您可以通过在名为"user_sequence"的单独集合中跟踪"id"并在MongoDB中存储自定义函数以获得下一个值来解决此问题.

You could solve this by keeping track the 'id' in a separate collection called 'user_sequence' and store a custom function in MongoDB to get the next value.

看看: https://docs.mongodb.com/manual/tutorial/store-javascript-function-on-server/

创建一个查询，例如:

db.users.insert({
    userid: sequenceNextValue("userid")
})

MongoDB的分步教程: https://docs.mongodb.com/v3.0/tutorial/create-an-auto-incrementing-field/

Step by step tutorial by MongoDB: https://docs.mongodb.com/v3.0/tutorial/create-an-auto-incrementing-field/

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