---
lang: en
title: 'API docs: repository.defaultcrudrepository.definepersistedmodel'
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.defaultcrudrepository.definepersistedmodel.html
---

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[Home](./index.md) &gt; [@loopback/repository](./repository.md) &gt; [DefaultCrudRepository](./repository.defaultcrudrepository.md) &gt; [definePersistedModel](./repository.defaultcrudrepository.definepersistedmodel.md)

## DefaultCrudRepository.definePersistedModel() method

Creates a legacy persisted model class, attaches it to the datasource and returns it. This method can be overridden in sub-classes to acess methods and properties in the generated model class.

**Signature:**

```typescript
protected definePersistedModel(entityClass: typeof Model): typeof juggler.PersistedModel;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  entityClass | typeof [Model](./repository.model.md) | LB4 Entity constructor |

**Returns:**

typeof juggler.PersistedModel