Check out v4 of the Fauna CLI

v4 of the Fauna CLI is now in beta.

The new version introduces enhancements to the developer experience, including an improved authentication workflow. To get started, check out the CLI v4 quick start.

`functionDef.exists()`

Learn: User-defined functions (UDFs)

Test if a user-defined function (UDF) exists.

Signature

exists() => Boolean

Description

Tests if an UDF, represented as an Function document, exists. Fauna stores UDFs as documents in the Function system collection.

Function documents are FQL versions of a database’s FSL function schema. Function documents have the FunctionDef type. See User-defined functions (UDFs).

Staged schema

If a database has staged schema, this method interacts with the database’s staged schema, not the active schema.

Parameters

None

Return value

Type Description

Type	Description
Boolean	If `true`, the `Function` document exists. If `false`, the `Function` document doesn’t exist.

Boolean

If true, the Function document exists. If false, the Function document doesn’t exist.

Examples

Function.byName("checkout").exists()

true

Is this article helpful?

Tell Fauna how the article can be improved:
Visit Fauna's forums or email docs@fauna.com

Thank you for your feedback!