如何使用驱动程序在 MongoDB 中进行文档版本控制

Question

Requires document versioning in MongoDB while editing on the app.

I have many "Cards" created by various users. A card can be edited at any point. The app must hold all the changes in the database so that an admin can roll back to old changes.

To do that I have tried to copy and existing document which represents one card, reinsert it with a different _id which will be considered version 0. Then update the copied one with latest changes. This was I expect db to hold version 1, 2, 3 of the same document . I say same document because I am copying the first document's _id as "source_id" for later to accumulate the result.

Using MongoDB.Driver with VB.Net

Although this hasn't worked, but is it a correct way to do?

Issues: FindOneAndUpdate returns the updated document and I lose the initial data.

Saw here about how to duplicate a document, but this didn't work for me. Saw many places mentioned upsert , but the following didn't work for me either.

Answer 1

The solution:

While editing an existing Card, create a new with incremented version. So use InsertOne method. Find the existing card, change certain fields that required to make the card latest before insert. Use a filed that allows card to be different from the rest. Let's user "status", which can be "published"/"draft"/"reject". Now in this case, change "status" field (from "Published" to "Draft") and increment the "version" field. No need to use "FindOneAndUpdate" because this will make the initial data lost.

This way in db there will be same card details with first card's ID as a resource id with different versions.