Do properties created on the fly to objects become persistent in the DB or just accessible while the program is running?

Question

I've seen many examples of properties created after the object has been created, dynamically. But It's not clear to me whether this can be made persistent for later access or can only be used while the program is running. 
Tnx

Byron Injeeli · Accepted Answer

Hi Murilo. Let's say that you create a new user like this:
javascript
db.create({
    email: req.body.email,
    username: req.body.name
}, (err, user) => {
    console.log(user);
});

Maybe you add a new property on this user object like this:
javascript
user.age = 31;

The user object will not be saved until you update the object with another method like this:
javascript
db.updateUser(user, (err, updatedUser) => {
    console.log('User updated.');
});

You can create your own custom methods (functions) to update/delete/create users using MongoDB.

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Murilo de Melo

Murilo de Melo

Do properties created on the fly to objects become persistent in the DB or just accessible while the program is running?

1 Answer

Byron Injeeli

Byron Injeeli