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• Description
• Behavior
• Example

Tip

Starting in version 3.2, MongoDB also provides the db.collection.bulkWrite() method for performing bulk write operations.

Description

Bulk.find. updateOne ( <update> )

New in version 2.6.

Adds a single document update operation to a bulk operations list.

Use the Bulk.find() method to specify the condition that determines which document to update. The Bulk.find.updateOne() method limits the update to a single document. To update multiple documents, see Bulk.find.update().

Bulk.find.updateOne() accepts the following parameter:

Parameter	Type	Description
update	document	An update document that specifies the modifications to make. Specify the modifications with update operator expressions. The sum of the associated <query> document from the Bulk.find() and the update document must be less than or equal to the maximum BSON document size.

• To specify an upsert: true for this operation, use with Bulk.find.upsert().
• To specify arrayFilters to specify which array elements to update, use with Bulk.find.arrayFilters().
• To replace a document wholesale, see Bulk.find.replaceOne().

Behavior

If the <update> document contains only update operator expressions, as in:

{
  $set: { status: "D" },
  $inc: { points: 2 }
}

Then, Bulk.find.updateOne() updates only the corresponding fields, status and points, in the document.

Example

The following example initializes a Bulk() operations builder for the items collection, and adds various updateOne operations to the list of operations.

var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( { status: "D" } ).updateOne( { $set: { status: "I", points: "0" } } );
bulk.execute();