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---
lang: en
title: 'API docs: repository.hasmanythroughrepository.patch'
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.hasmanythroughrepository.patch.html
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@loopback/repository](./repository.md) > [HasManyThroughRepository](./repository.hasmanythroughrepository.md) > [patch](./repository.hasmanythroughrepository.patch.md)
## HasManyThroughRepository.patch() method
Patch multiple target model instances
**Signature:**
```typescript
patch(dataObject: DataObject<Target> | {
[polymorphicType: string]: DataObject<Target>;
}, where?: Where<Target>, options?: Options & {
throughOptions?: Options & {
discriminator?: string;
};
} & {
isPolymorphic?: boolean;
}): Promise<Count>;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| dataObject | [DataObject](./repository.dataobject.md)<!-- --><Target> \| { \[polymorphicType: string\]: [DataObject](./repository.dataobject.md)<!-- --><Target>; } | The fields and their new values to patch |
| where | [Where](./filter.where.md)<!-- --><Target> | _(Optional)_ Instances within the where scope are patched |
| options | [Options](./repository.options.md) & { throughOptions?: [Options](./repository.options.md) & { discriminator?: string; }; } & { isPolymorphic?: boolean; } | _(Optional)_ options.throughOptions.discriminator - target discriminator field on through options.isPolymorphic - whether dataObject is a dictionary |
**Returns:**
Promise<[Count](./repository.count.md)<!-- -->>
A promise which resolves the patched target model instances