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Binary.createFromBase64() (mongosh method)

Definition

Creates a binary object from a base64 value.

Compatibility

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

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

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

Syntax

Binary.createFromBase64( <base64String> [ , <subType> ] )

Method Fields

The method accepts the following fields:

Field

Type

Description

base64String

String

Specifies a string that contains a base64 value. For example, "SGVsbG8gV29ybGQhCg==".

subType

Integer

Optional. Specifies a binary subtype.

Value	Description
0	Generic binary subtype
1	Function
2	Byte array (deprecated)
3	Old UUID (deprecated)
4	UUID
5	MD5
128 through 255	User defined

Examples

The following examples show how to add a binary object to a document using Binary.createFromBase64() and how the binary object appears in the output when retrieved.

Create Collection Containing Document with Binary Object

The following example creates a collection named binaryObjectsFromBase64:

db.binaryObjectsFromBase64.insertOne( {
   _id: 0,
   binaryObject: Binary.createFromBase64( "SGVsbG8gV29ybGQhCg==" )
} )

The binaryObject field contains the binary object created from the string specified in Binary.createFromBase64().

Retrieve Document from Collection with Binary Object

The following example retrieves the document:

db.binaryObjectsFromBase64.findOne( { _id: 0 } )

Note

Starting in mongosh 2.0.0, binary objects are shown as Binary.createFromBase64( <base64String> ) values instead of Binary( Buffer.from( <base64String> ) ) values. This only changes the display of binary values.

Example output, starting in mongosh 2.0.0:

{
   _id: 0,
   binaryObject: Binary.createFromBase64("SGVsbG8gV29ybGQhCg==")
}

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Object Constructors

Binary.createFromHexString