Mongoose starting and aborting a transaction

Question

I'm trying to understand how to begin and undo a transaction. I thought session.abortTransaction() would cause all the updates in the transaction to undo, in this case, just Profile.updateOne. But after I ran the code below, Profile 1's username was changed to 'phoebe2'. Since the transaction was aborted, I'd still expect the username to be the old username.

How do you undo a transaction?

const session = await mongoose.startSession(); await session.startTransaction(); await Profile.updateOne({ _id: '1' }, { username: 'phoebe2' }); // undo transaction await session.abortTransaction(); await session.endSession();

albinjose · Accepted Answer · 2022-11-08 11:12:30Z

you need to pass session as the last argument in updateOne

const session = await mongoose.startSession(); await session.startTransaction(); await Profile.updateOne({ _id: '1' }, { username: 'phoebe2' },{session}); // undo transaction await session.abortTransaction(); await session.endSession();

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