@loopback/docs/site/apidocs/metadata.metadatainspector.getallparametermetadata.md

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---
lang: en
title: 'API docs: metadata.metadatainspector.getallparametermetadata'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/metadata
permalink: /doc/en/lb4/apidocs.metadata.metadatainspector.getallparametermetadata.html
---

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[Home](./index.md) &gt; [@loopback/metadata](./metadata.md) &gt; [MetadataInspector](./metadata.metadatainspector.md) &gt; [getAllParameterMetadata](./metadata.metadatainspector.getallparametermetadata.md)

## MetadataInspector.getAllParameterMetadata() method

Get the metadata associated with the given key for all parameters of a given method

<b>Signature:</b>

```typescript
static getAllParameterMetadata<T>(key: MetadataKey<T, ParameterDecorator>, target: Object, methodName?: string, options?: InspectionOptions): T[] | undefined;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  key | [MetadataKey](./metadata.metadatakey.md)<!-- -->&lt;T, ParameterDecorator&gt; | Metadata key |
|  target | Object | Class for static methods or prototype for instance methods |
|  methodName | string | Method name. If not present, default to '' to use the constructor |
|  options | [InspectionOptions](./metadata.inspectionoptions.md) | Options for inspection |

<b>Returns:</b>

T\[\] \| undefined