Docs Menu
Docs Home
MongoDB Manual
/ / /


On this page

  • Definition
  • Behavior
  • Required Access
  • Example
db.grantRolesToUser(username, roles, writeConcern)

Grants additional roles to a user.


mongosh Method

This page documents a mongosh method. This is not the documentation for database commands or language-specific drivers, such as Node.js.

For the database command, see the grantRolesToUser command.

For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.

For the legacy mongo shell documentation, refer to the documentation for the corresponding MongoDB Server release:

mongo shell v4.4

The db.grantRolesToUser() method uses the following syntax:

db.grantRolesToUser( "<username>", [ <roles> ], { <writeConcern> } )

The db.grantRolesToUser() method takes the following arguments:

The name of the user to whom to grant roles.
An array of additional roles to grant to the user.

Optional. The level of write concern for the operation. See Write Concern Specification.

In the roles field, you can specify both built-in roles and user-defined roles.

To specify a role that exists in the same database where db.grantRolesToUser() runs, you can either specify the role with the name of the role:


Or you can specify the role with a document, as in:

{ role: "<role>", db: "<database>" }

To specify a role that exists in a different database, specify the role with a document.

The db.grantRolesToUser() method wraps the grantRolesToUser command.

If run on a replica set, db.grantRolesToUser() is executed using "majority" write concern by default.

You must have the grantRole action on a database to grant a role on that database.

Given a user accountUser01 in the products database with the following roles:

"roles" : [
{ "role" : "assetsReader",
"db" : "assets"

The following db.grantRolesToUser() operation gives accountUser01 the readWrite role on the products database and the read role on the stock database.

use products
[ "readWrite" , { role: "read", db: "stock" } ],
{ w: "majority" , wtimeout: 4000 }

The user accountUser01 in the products database now has the following roles:

"roles" : [
{ "role" : "assetsReader",
"db" : "assets"
{ "role" : "read",
"db" : "stock"
{ "role" : "readWrite",
"db" : "products"
← db.getUsers()