Mongoose, update values in array of objects

Question

You're close; you should use dot notation in your use of the $ update operator to do that:

Person.update({'items.id': 2}, {'$set': {
    'items.$.name': 'updated item2',
    'items.$.value': 'two updated'
}}, function(err) { ...

model.update(
    { _id: 1, "items.id": "2" },
    {
        $set: {
            "items.$.name": "yourValue",
            "items.$.value": "yourvalue",
         }
    }
)

MongoDB Document

There is a mongoose way for doing it.

const itemId = 2;
const query = {
  item._id: itemId 
};
Person.findOne(query).then(doc => {
  item = doc.items.id(itemId );
  item["name"] = "new name";
  item["value"] = "new value";
  doc.save();

  //sent respnse to client
}).catch(err => {
  console.log('Oh! Dark')
});

There is one thing to remember, when you are searching the object in array on the basis of more than one condition then use $elemMatch

Person.update(
   {
     _id: 5,
     grades: { $elemMatch: { grade: { $lte: 90 }, mean: { $gt: 80 } } }
   },
   { $set: { "grades.$.std" : 6 } }
)

here is the docs

For each document, the update operator $set can set multiple values, so rather than replacing the entire object in the items array, you can set the name and value fields of the object individually.

{'$set':  {'items.$.name': update.name , 'items.$.value': update.value}}