CODEWITHSUNDEEP
javamongodbmongodb-java
Arsen Davtyan
Arsen Davtyan

Reputation: 1957

What's the difference between findOneAndUpdate and findOneAndReplace?

I've recently installed the Java MongoDB Driver 3.1.1 version and I'm wondering what's the difference between findOneAndUpdate and findOneAndReplace?

In what situation should i use each one?

Upvotes: 22

Views: 14110

Answers (1)

Kevin
Kevin

Reputation: 541

The findOneAndUpdate searches the document and updates just the entries in the given update document. The other entries in the found document will remain.

The findOneAndReplace searches the document, removes everything inside this document and sets the entries of the given replacement document.

For example: You have a document {"name":"James", "age":"21"}

If you use the findOneAndUpdate function with the update document {"age":"22"}, you will get the document {"name":"James", "age":"22"}

If you use the findOneAndReplace function with the replacement document {"age":"22"}, you will get the document {"age":"22"} (The name has been deleted)

See: findOneAndUpdate Documentation and findOneAndReplace Documentation

Upvotes: 40

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