grantRolesToRole

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Definition
Behavior
Required Access
Example

Definition

grantRolesToRole

Tip

In mongosh, this command can also be run through the db.grantRolesToRole() 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 grantRolesToRole command affects roles on the database where the command runs.

The command has the following syntax:

db.runCommand(
   {
     grantRolesToRole: "<role>",
     roles: [
                { role: "<role>", db: "<database>" },
                ...
            ],
     writeConcern: { <write concern> },
     comment: <any>
   }
)

The command has the following fields:

Field	Type	Description
`grantRolesToRole`	string	The name of a role to add subsidiary roles.
`roles`	array	An array of roles from which to inherit.
`writeConcern`	document	Optional. The level of write concern for the operation. See Write Concern Specification.
`comment`	any	Optional. A user-provided comment to attach to this command. Once set, this comment appears alongside records of this command in the following locations: mongod log messages, in the `attr.command.cursor.comment` field. Database profiler output, in the `command.comment` field. `currentOp` output, in the `command.comment` field. A comment can be any valid BSON type (string, integer, object, array, etc). New in version 4.4.

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 grantRolesToRole runs, you can either specify the role with the name of the role:

"readWrite"

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.

Behavior

A role can inherit privileges from other roles in its database. A role created on the admin database can inherit privileges from roles in any database.

Required Access

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

Example

The following grantRolesToRole command updates the productsReaderWriter role in the products database to inherit the privileges of the productsReader role in the products database:

use products
db.runCommand(
   { grantRolesToRole: "productsReaderWriter",
     roles: [
              "productsReader"
     ],
     writeConcern: { w: "majority" , wtimeout: 5000 }
   }
)

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