Nest - TransformInterceptor, working with Exclude decorator

transform.interceptor.ts

import { ExecutionContext, Injectable, NestInterceptor, CallHandler } from '@nestjs/common';
import { classToPlain } from 'class-transformer';
import { Observable } from 'rxjs';
import { map } from 'rxjs/operators';

@Injectable()
export class TransformInterceptor implements NestInterceptor {
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    return next.handle().pipe(map(data => classToPlain(data)));
  }
}

Add this line to main.ts

app.useGlobalInterceptors(new TransformInterceptor());