Question

我在访问派生类中的成员时遇到问题。我正在将node.js与typescript和expressjs结合使用，mountRoutes()将控制器的功能添加到了主要的express应用中。我可以访问派生类的构造函数中的成员，但不能访问express调用的函数中的成员。有谁知道我该如何解决这个问题。

谢谢。

基类

import { Router } from "express";

export abstract class Controller {

    protected mRouter: Router;  
    protected readonly mName: string;

    public constructor(controllerName: string) {
        this.mRouter = Router();
       this.mName = controllerName;

    }

    // Public interface for router
    get router(): Router {
       return this.mRouter;
    }

    // Public interface for router
    get name(): string {
      return this.mName;
    }

    // Mount routes of controller 
    protected abstract mountRoutes(): void;

    // Get error ID for error
    protected error_id(error_id1: number): string {
       return 'Controller ' + this.mName + ': ' + error_id1.toString();
   }
}

和派生类：从“ ./controller”导入{Controller};

import { Response, NextFunction } from 'express';

import { DatabaseService } from "../database/database.service";

class UserController extends Controller {

    constructor() {
       super('user');
       this.mountRoutes();
    }

    protected mountRoutes(): void {
        this.mRouter.get('/', this.getUsers);
    }

    private getUsers(request: any, response: Response, next: NextFunction): void {
       console.log(this.mName); // HERE: this is UNDEFINED


   }
}

export default new UserController().router;

Typescript + expressjs：无法访问派生类中的基类属性

0 个答案: