Mongoose findOneAndUpdate only update fields if there is no value or it's null otherwise leave as it is

Question

How can I update only if there is no value on fields?

//...just a sample code snippet

const {name, email, phone} = data;
const user = await User.findOneAndUpdate(
   { email},
   { name // only update if not exists or null or no value },
   {new:true,upsert: true}
)

console.log(user}

//...code 

This is just an example. I just want to know if we can update the name field value only if there is no value else leave the field value as it is.

Answer 1

You can use this

const {name, email, phone} = data;
let user = await User.findOne({ email}, { name });

if(!user) {
  user = new User({name, email, phone});
} else {
  if(!user['name')) {
    user['name'] = name;
  }
}
await user.save();