In a nested MongoDB call, how can I ensure atomicity?

Question

Is it possible to automatically update / delete two documents in MongoDB, causing a new update / delete call from the first update callback? In the example below, I want to remove the second document from the collection, but only if the update of the first document is successfully completed:

db.collection.update(conditions1, {$set: set}, function (err,result){ db.collection.remove(conditions2, function(err,doc_num){ db.close(); )}; }); 

I come across the operator of $ isolated requests, but from what I understand in the documentation, this operator is used to perform read / write locks on one request that affects several documents, and not when reading / writing, block one document after updating on another document using the first document update callback that I want to try and execute.

Answer 1

No, that’s not possible, because. As described here, the lock will be implemented on one request, and not on the whole transaction.

You can overcome the atomicity problem by using this .

Answer 2

As Amir said, this is not possible, but you can imitate the behavior in mangoes following a two-stage fixation scheme . This link also refers to how to perform rollback operations.