Error when creating mapped types

[gmwill934]

I'm submitting a...

[ ] Regression 
[x ] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Error when using PartialType from '@nestjs/mapped-types'.

[Nest] 99355   - 01/14/2021, 2:38:25 PM   [MappedTypes] Transformer ("class-transformer") metadata cannot be inherited for "CreateCoffeeDto" class.
[Nest] 99355   - 01/14/2021, 2:38:25 PM   [MappedTypes] Object:

Expected behavior

Create a variant from a dto to avoid code redundancy

Minimal reproduction of the problem with instructions

https://gist.github.com/gmwill934/c3c68650f773018aa8c656697ea2c625

What is the motivation / use case for changing the behavior?

Environment

{
  "name": "iluvcoffee",
  "version": "0.0.1",
  "description": "",
  "author": "",
  "private": true,
  "license": "UNLICENSED",
  "scripts": {
    "prebuild": "rimraf dist",
    "build": "nest build",
    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
    "start": "nest start",
    "start:dev": "nest start --watch",
    "start:debug": "nest start --debug --watch",
    "start:prod": "node dist/main",
    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
    "test": "jest",
    "test:watch": "jest --watch",
    "test:cov": "jest --coverage",
    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
    "test:e2e": "jest --config ./test/jest-e2e.json"
  },
  "dependencies": {
    "@nestjs/common": "^7.5.1",
    "@nestjs/core": "^7.5.1",
    "@nestjs/mapped-types": "^0.1.1",
    "@nestjs/platform-express": "^7.5.1",
    "@nestjs/typeorm": "^7.1.5",
    "class-transformer": "^0.3.2",
    "class-validator": "^0.13.1",
    "pg": "^8.5.1",
    "reflect-metadata": "^0.1.13",
    "rimraf": "^3.0.2",
    "rxjs": "^6.6.3",
    "typeorm": "^0.2.30"
  },
  "devDependencies": {
    "@nestjs/cli": "^7.5.1",
    "@nestjs/schematics": "^7.1.3",
    "@nestjs/testing": "^7.5.1",
    "@types/express": "^4.17.8",
    "@types/jest": "^26.0.15",
    "@types/node": "^14.14.6",
    "@types/supertest": "^2.0.10",
    "@typescript-eslint/eslint-plugin": "^4.6.1",
    "@typescript-eslint/parser": "^4.6.1",
    "eslint": "^7.12.1",
    "eslint-config-prettier": "^6.15.0",
    "eslint-plugin-prettier": "^3.1.4",
    "jest": "^26.6.3",
    "prettier": "^2.1.2",
    "supertest": "^6.0.0",
    "ts-jest": "^26.4.3",
    "ts-loader": "^8.0.8",
    "ts-node": "^9.0.0",
    "tsconfig-paths": "^3.9.0",
    "typescript": "^4.0.5"
  },
  "jest": {
    "moduleFileExtensions": [
      "js",
      "json",
      "ts"
    ],
    "rootDir": "src",
    "testRegex": ".*\\.spec\\.ts$",
    "transform": {
      "^.+\\.(t|j)s$": "ts-jest"
    },
    "collectCoverageFrom": [
      "**/*.(t|j)s"
    ],
    "coverageDirectory": "../coverage",
    "testEnvironment": "node"
  }
}

Nest version: 7.5.1

 
For Tooling issues:
- Node version: 14.15.1
- Platform:  Mac
- Using npm

[gmwill934]

Downgraded the class-transformer package to version 0.3.1 and the error disappeared.

[kamilmysliwiec]

Fixed in the latest version of @nestjs/mapped-types