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  • Definition
  • Syntax
  • Command Fields
  • Required Access
  • Example

Grants additional roles to a user.


In mongosh, this command can also be run through the db.grantRolesToUser() helper method.

Helper methods are convenient for mongosh users, but they may not return the same level of information as database commands. In cases where the convenience is not needed or the additional return fields are required, use the database command.

The grantRolesToUser command uses the following syntax:

grantRolesToUser: "<user>",
roles: [ <roles> ],
writeConcern: { <write concern> },
comment: <any>

The command takes the following fields:

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

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


Optional. A user-provided comment to attach to this command. Once set, this comment appears alongside records of this command in the following locations:

A comment can be any valid BSON type (string, integer, object, array, etc).

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 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.

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 grantRolesToUser operation gives accountUser01 the read role on the stock database and the readWrite role on the products database.

use products
db.runCommand( { grantRolesToUser: "accountUser01",
roles: [
{ role: "read", db: "stock"},
writeConcern: { w: "majority" , wtimeout: 2000 }
} )

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"
← dropUser