typescript - 类型错误 : Class constructor MixinStrategy cannot be invoked without 'new'

Question

我正在关注这里的 jwt 示例 https://docs.nestjs.com/techniques/authentication .我复制并粘贴了示例。在 npm 安装必要的位和 bops 之后，我得到了这个错误，这在我刚刚复制的示例中没有发生。我不知道这是什么意思!有人有什么想法吗？

TypeError: Class constructor MixinStrategy cannot be invoked without 'new'

   8 | export class JwtStrategy extends PassportStrategy(Strategy) {
   9 |   constructor(private readonly authService: AuthService) {
> 10 |     super({
  11 |       jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
  12 |       secretOrKey: 'secretKey',
  13 |     });

  at new JwtStrategy (data/auth/strategies/jwt.strategy.ts:10:5)
  at resolveConstructorParams (../node_modules/@nestjs/core/injector/injector.js:64:84)
  at Injector.resolveConstructorParams (../node_modules/@nestjs/core/injector/injector.js:86:30)

Answer 1

project缺少 @types/passport-jwt 类型，因此应该另外安装它们:

npm i -D @types/passport-jwt

这导致

src\auth\jwt.strategy.ts (10,6): Call target does not contain any signatures. (2346)

错误，因为 @nestjs/passport 没有正确输入； PassportStrategy return type is any .

为了解决这个问题，

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
...

应该改为:

import { ExtractJwt, Strategy } from 'passport-jwt';
import { AbstractStrategy, PassportStrategy } from '@nestjs/passport';
...
const PassportJwtStrategy: new(...args) => AbstractStrategy & Strategy = PassportStrategy(Strategy);

@Injectable()
export class JwtStrategy extends PassportJwtStrategy {
...