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lang: en
title: 'API docs: repository.entitynotfounderror._constructor_'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/repository
permalink: /doc/en/lb4/apidocs.repository.entitynotfounderror._constructor_.html
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[Home](./index.md) > [@loopback/repository](./repository.md) > [EntityNotFoundError](./repository.entitynotfounderror.md) > [(constructor)](./repository.entitynotfounderror._constructor_.md)
## EntityNotFoundError.(constructor)
Constructs a new instance of the `EntityNotFoundError` class
<b>Signature:</b>
```typescript
constructor(entityOrName: typeof Entity | string, entityId: ID, extraProperties?: Props);
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| entityOrName | typeof [Entity](./repository.entity.md) \| string | |
| entityId | ID | |
| extraProperties | Props | |