feature(@nestjs/common) add field name to the @uploadedfile() decorator

Author: kamilmysliwiec

packages/common/decorators/http/route-params.decorator.ts

@@ -2,8 +2,8 @@ import 'reflect-metadata';
 import { ROUTE_ARGS_METADATA } from '../../constants';
 import { RouteParamtypes } from '../../enums/route-paramtypes.enum';
 import { PipeTransform } from '../../index';
-import { isNil, isString } from '../../utils/shared.utils';
 import { Type } from '../../interfaces';
+import { isNil, isString } from '../../utils/shared.utils';
 
 export type ParamData = object | string | number;
 export interface RouteParamsMetadata {
@@ -71,7 +71,7 @@ export const Next: () => ParameterDecorator = createRouteParamDecorator(
 export const Session: () => ParameterDecorator = createRouteParamDecorator(
   RouteParamtypes.SESSION,
 );
-export const UploadedFile: () => ParameterDecorator = createRouteParamDecorator(
+export const UploadedFile: (fileKey?: string) => ParameterDecorator = createRouteParamDecorator(
   RouteParamtypes.FILE,
 );
 export const UploadedFiles: () => ParameterDecorator = createRouteParamDecorator(

packages/common/interceptors/file-fields.interceptor.ts

@@ -1,13 +1,13 @@
 import * as multer from 'multer';
-import { NestInterceptor } from './../interfaces/features/nest-interceptor.interface';
 import { Observable } from 'rxjs';
-import { MulterOptions } from '../interfaces/external/multer-options.interface';
-import { transformException } from './multer/multer.utils';
 import { ExecutionContext } from '../interfaces';
+import { MulterField, MulterOptions } from '../interfaces/external/multer-options.interface';
+import { NestInterceptor } from './../interfaces/features/nest-interceptor.interface';
+import { transformException } from './multer/multer.utils';
 
 export function FileFieldsInterceptor(
-  uploadFields: multer.Field[],
-  options?: MulterOptions
+  uploadFields: MulterField[],
+  options?: MulterOptions,
 ) {
   const Interceptor = class implements NestInterceptor {
     readonly upload = multer(options);

packages/common/interceptors/index.ts

@@ -1,2 +1,3 @@
+export * from './file-fields.interceptor';
 export * from './file.interceptor';
 export * from './files.interceptor';

packages/common/interceptors/multer/multer.utils.ts

@@ -1,9 +1,4 @@
-import {
-  InternalServerErrorException,
-  HttpException,
-  PayloadTooLargeException,
-  BadRequestException,
-} from './../../exceptions';
+import { BadRequestException, HttpException, PayloadTooLargeException } from './../../exceptions';
 import { multerExceptions } from './multer.constants';
 
 export function transformException(error: Error | undefined) {

packages/common/interfaces/external/multer-options.interface.ts

@@ -52,3 +52,10 @@ export interface MulterOptions {
     callback: (error: Error | null, acceptFile: boolean) => void,
   ): void;
 }
+
+export interface MulterField {
+  /** The field name. */
+  name: string;
+  /** Optional maximum number of files per field to accept. */
+  maxCount?: number;
+}

packages/core/router/route-params-factory.ts

@@ -4,7 +4,7 @@ import { IRouteParamsFactory } from './interfaces/route-params-factory.interface
 export class RouteParamsFactory implements IRouteParamsFactory {
   public exchangeKeyForValue(
     key: RouteParamtypes | string,
-    data,
+    data: string | object | any,
     { req, res, next },
   ) {
     switch (key) {
@@ -25,7 +25,7 @@ export class RouteParamsFactory implements IRouteParamsFactory {
       case RouteParamtypes.SESSION:
         return req.session;
       case RouteParamtypes.FILE:
-        return req.file;
+        return req[data || 'file'];
       case RouteParamtypes.FILES:
         return req.files;
       default: