Mongo.getWriteConcern()

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Definition

Mongo.getWriteConcern()

Returns:	The current write concern for the `Mongo()` connection object.

See the Write Concern for an introduction to write concerns in MongoDB.

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

MongoDB Enterprise: The subscription-based, self-managed version of MongoDB
MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB

The command takes the following form:

db.getMongo().getWriteConcern()

This operation returns a document with the following values:

{ w: <value>, wtimeout: <number>, j: <boolean> }

The fields are:

Field	Description
`w`	The number of `mongod` or `mongod` instances that must acknowledge a write. Possible values are: "majority". A majority of the target instances must acknowledge the write. <number>. The specified number of target instances must acknowledge the write. <custom write concern name>. A user defined write concern, the tagged instances must acknowledge the write. See write concern specification for details.
`j`	A boolean value. `j: true` requests acknowledgment that the write operation has been written to the on-disk journal.
`wtimeout`	The number of milliseconds to wait for acknowledgment of the write concern. `wtimeout` is only applicable when `w` has a value greater than `1`.

To return the current write concern, enter the following:

db.getMongo().getWriteConcern()

When a write concern is specified using Mongo.setWriteConcern(), the output of Mongo.getWriteConcern() is similar to:

WriteConcern { w: 2, wtimeout: 1000, j: true }

The Mongo.getWriteConcern() command returns an empty line if no write concern has been specified.