Question 117110 in Mongodb Question posted in
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Mongodb – Difference between the UpdateOne() and findOneAndUpdate Methods in Mongo DB

What is the difference between the UpdateOne() and the findOneAndUpdate() methods in Mongo DB?
I can’t seem o understand their differences. Would appreciate it if a demonstrative example using UpdateOne() and findOneAndUpdate could be used.

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2

Answers


  1. 0

    Insert a document in an otherwise empty collection using the mongo-shell to start:

    db.users.insertOne({name: "Jack", age: 11})

    UpdateOne

    db.users.updateOne({name: "Jack"}, {$set: {name: "Joe"}})

    This operation returns an UpdateResult.

    { acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0 }

    FindOneAndUpdate

    db.users.findOneAndUpdate({name: "Joe"}, {$set: {name: "Jill"}})

    This operation returns the document that was updated.

    { _id: ObjectId("62ecf94510fc668e92f3cecf"),
  name: 'Joe',
  age: 11 }

    FindOneAndUpdate is preferred when you have to update a document and fetch it at the same time.

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  2. 0

    If you need to return the New Document instead of the original document, you can use one of these ways:

    db.users.findOneAndUpdate(
  {name: "Joe"},
  {$set: {name: "Jill"}},
  {returnDocument: "after"}
)

    returnDocument: "before" –> returns the original document (default).
    returnDocument: "after" –> returns the updated document.

    Or

    db.users.findOneAndUpdate(
  {name: "Joe"},
  {$set: {name: "Jill"}},
  {returnNewDocument: true}
)

    returnNewDocument: false –> returns the original document (default).
    returnNewDocument: true –> returns the updated document.

    Note: If both options are set (returnDocument and returnNewDocument), returnDocument takes precedence.

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