requireRepository

function requireRepository<T>(
  repository: T | null | undefined,
  message: string = "Repository is not defined."
): T;

requireService for the layer above the services: a data source that a container was supposed to provide and did not. The exception names the situation instead of leaving a null to travel further.

Parameters

Parameter	Type	Description
`repository`	`T \\| null \\| undefined`	The repository to check.
`message` (optional) `= "Repository is not defined."`	`string`	The message of the exception. A default is used when omitted.

Returns

T — the same repository.

Throws

Exception	Condition
`RepositoryIsNotDefinedException`	the repository is `null` or `undefined`.

Examples

In use

const users = requireRepository(registry.users, "The user repository is not wired up.");

Source

src/appsscript/requireRepository.ts

23 September 2026

This documentation was generated with AI (Claude) from the library's source code.

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