Bulk.find.updateOne()

Description

Bulk.find.updateOne(<update>)

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 or pipeline	The modifications to apply. Can be one of the following: A replacement document Contains only field and value pairs. See also Bulk.find.replaceOne(). Update document Contains only update operator expressions. Aggregation pipeline Contains only the following aggregation stages: $addFields and its alias $set $project and its alias $unset $replaceRoot and its alias $replaceWith. For more information on the update modification parameter, see the db.collection.updateOne() reference page. 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 update specific array elements, use with Bulk.find.arrayFilters().

• To specify the index to use for the associated Bulk.find(), see Bulk.find.hint().

• To replace a document wholesale, see also Bulk.find.replaceOne().

Compatibility

This command is available in deployments hosted in the following environments:

• MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud

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();

var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( {  status: "P" } ).updateOne(
   [
      { $set: { points: 0, lastModified: "$$NOW" } }
   ]
);
bulk.execute();