IdentityDeserializer

Kind: Class

Source: packages/microservices/deserializers/identity.deserializer.ts

Part of: Microservices

IdentityDeserializer is a pass-through microservice deserializer that returns incoming message data without transforming it. It is useful when a transport adapter already provides data in the format expected by the application and no custom parsing or normalization is required.

Implements: Deserializer

Methods

Diagram

mermaid
graph LR
  A[Microservice Transport] --> B[Incoming Message]
  B --> C[IdentityDeserializer]
  C --> D[deserialize()]
  D --> E[Original Message Value]
  E --> F[Message Handler]

Usage

ts
import { IdentityDeserializer } from '@nestjs/microservices';

const deserializer = new IdentityDeserializer();

const incomingMessage = {
  pattern: 'user.created',
  data: {
    id: 'user-123',
    email: 'user@example.com',
  },
};

const result = deserializer.deserialize(incomingMessage);

console.log(result === incomingMessage); // true

AI Coding Instructions

• Use IdentityDeserializer when transport payloads should be passed directly to message handlers without parsing or transformation.
• Do not add validation, serialization, or cloning logic here; use a custom deserializer when payload normalization is required.
• Ensure the configured microservice transport produces payloads compatible with the consuming handler's expected shape.
• Configure this deserializer through the microservice transport options when replacing a transport-specific or custom deserialization strategy.