nest_error_handling_interceptor.ts

import { Injectable, NestInterceptor, ExecutionContext, CallHandler, HttpException, HttpStatus } from '@nestjs/common';
import { Observable } from 'rxjs';
import { catchError } from 'rxjs/operators';

@Injectable()
export class ErrorHandlingInterceptor implements NestInterceptor {
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    return next.handle().pipe(
      catchError(err => {
        throw new HttpException('Something went wrong', HttpStatus.INTERNAL_SERVER_ERROR);
      })
    );
  }
}