typescript类这是未定义的，节点js

Question

我有一个类控制器CrudController.ts

import ibuild = require("../dataAccess/MongoDAO");
import dataAccess = require("../dataAccess/IGenericDAO");
export class CrudController {
    protected model;
    protected dao: dataAccess.IGenericDAO;
    public constructor(model) {
        this.model = model;
        this.dao = new ibuild.MongoDAO(model);
        console.log(this.dao);
    }

    public list(req, res) {
        this.dao.findAll(res);
    }
}

创建它的实例并将其传递给路由器，如下所示

'use strict';
var controllers = require('../controllers/CrudController');
var ibuildController = require('../controllers/ibuildController');
var mongoose = require('mongoose');
var Company = mongoose.model('Companies');
var controller = new controllers.CrudController(Company);
module.exports = function (app) {

    // ibuild Routes
    app.route('/company')
        .get(controller.list);
};

但是每当我从控制器调用任何方法时，我都会在控制器中得到这个未定义的内容。

如何解决......