Mongoose update nested object code example

Example 1: mongoose iupdate nested

blog.findByIdAndUpdate(entityId, {$set: {'meta.favs': 56}}, function(err, doc) {
    console.log(doc);
});

Example 2: mongoose update array in object

Person.findOneAndUpdate({_id: id}, 
{ 
  "$set": {[`items.$[outer].${propertyName}`]: value} 
},
{ 
  "arrayFilters": [{ "outer.id": itemId }]
},
function(err, response) {
  ...
})