Model helper methods

There are three static methods for updating data in a single go:

• update(): This method updates matching documents in the database without returning them

• findOneAndUpdate(): This method has the same approach as findOne that we looked at earlier, but writes the updates to the database before returning the found instance to the callback

• findByIdAndUpdate(): This method is the same as findOneAndUpdate, but expects a unique ID instead of query object

Building the commands

Each of these methods can take the following four arguments:

• conditions: These are the query conditions (or _id for findByIdAndUpdate) used to find documents to update

• update: This is an object containing the fields and values to set

• options: This is an object specifying options for this operation (see more details about this in just a moment)

• callback: This is the function to run after a successful operation

The options differ depending on the call made. The update() method has one set of options you can set...