Node.js, MongoDB, and AngularJS Web Development

Updating Documents in a Collection

Once objects have been inserted into a collection, you may need to update them from time to time as the data changes. The MongoDB Node.js driver provides several great methods for updating documents. The most commonly used is the update() method, which is versatile and yet fairly easy to implement. The following is the syntax for the update() method:

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update(query, update, [options], [callback])

The query parameter is a document that is used to identify which document(s) you want to change. The request matches the properties and values in the query parameter with the fields and values of the object, and only those that match the query are updated. The update parameter is an object ...