update-api.md

Update API

Supported update operators:

• $inc
• $mul
• $rename
• $set
• $unset
• $min
• $max
• $addToSet
• $pop
• $push
• $pull
• $pullAll
• $slice
• $sort

API:

collection.update(query, updates)

• query is the same query object as in Query API.
• updates is an object that contains updates and zero or more update operators

Returns a promise which resolves with a number of updated objects.

Examples:

Perform a simple field update:

db.collection('people').update({ lastname: 'Doe' }, { age: 45 }).then(function(updatesCount) {
    // ...
});

Perform an update using update operators:

db.collection('people').update({ lastname: 'Doe' }, { $inc: { age: 1 } }).then(function(updatesCount) {
    // ...
});