Is there any function in MongoDB to find documents in batches and then update the specified field values of documents?

  mongodb, question

Now there is a requirement to use MongoDB to find documents and update the fields in the documents at the same time, that is, to use a command to complete the search and update (atomicity).
In Mongo, there are similar methods for a single document, such as FindAndModify search and update, which are atomic but only apply to a single document.
Ask if it is possible to find multiple documents and update the fields of the documents accordingly.

I. Atomicity in MongoDB:

1. For a single document, it is atomic. FindAnyModify operates only one document, so it is atomic.

2. For operations on multiple documents, each operation on a single document is atomic, but the whole operation is not atomic, and there may be other operations on documents in the operation process.

However, in most scenarios, the atomicity of a single document has already met the requirements.

If you need to atomize the operation of multiple documents, you need to cooperate with your own code/design.

Second, according to your expressed needs, you can actually use the multi option of update or directly use updateMany.

 db.collection.update(,{multi : true})

For reference.

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