# OnDeserialize Decorator jsonMapper schema property alias

Module
import { OnDeserialize } from "@tsed/common"
Source/packages/common/src/jsonschema/decorators/propertyDeserialize.ts

# Overview

function OnDeserialize(fn: (value: any) => any): Function;

# Description

Call the function before property deserialization.

# Example

class Model {
   @OnDeserialize(v => v + 1)
   property: string;
}
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