Mongoose: findOneAndUpdate doesn’t return updated document

The original, unaltered document is return from default. If we need a new, latest document to be returned you have to pass an additional argument: an object with the new property set to true.

Through from mongoose docs:

Query#findOneAndUpdate

Model.findOneAndUpdate(conditions, update, options, (error, doc) => {
  // error: any errors that occurred
  // doc: the document before updates are applied if `new: false`, or after updates if `new = true`
});

Here, Option

• • If new : bool true, return the modified document rather than the original. defaults to false (changed in 4.0)

Then, if we need the latest answer in doc variable:

Cat.findOneAndUpdate({age: 17}, {$set:{name:"Naomi"}}, {new: true}, (err, doc) => {
     if (err) {
            console.log("Something wrong when updating data!");
     }
     console.log(doc);
});

When you  using the Node.js driver instead of Mongoose, You will need to use {returnOriginal:false} instead of {new:true}

The original document return from by default findOneAndUpdate. If you want it to return the modified document pass an options object { new: true } to the function:

Cat.findOneAndUpdate({ age: 17 }, { $set: { name: "Naomi" } }, { new: true }, function(err, doc) {
});