---
meta:
 - name: keywords
   description: api typescript node.js documentation mapClassError function
---
# mapClassError - @tsed/ajv

## Usage

```typescript
import { mapClassError } from "@tsed/ajv";
```

> See [/packages/specs/ajv/src/utils/mapClassError.ts](https://github.com/tsedio/tsed/blob/v8.28.0/packages/specs/ajv/src/utils/mapClassError.ts#L0-L0).

## Overview

```ts
function mapClassError(error: AjvErrorObject, targetType: Type<any>): string | undefined;
```

-   **error** (`AjvErrorObject`): AJV error object to transform.

-   **targetType** (`Type<any>`): Class used to resolve property metadata.

<!-- Description -->

## Description

Rewrite class-related AJV messages using Ts.ED metadata.

For missing required properties, this method replaces the property key by
the store-resolved property name when aliasing/naming is configured.