小编Mlo*_*den的帖子

我正在为学校做一个小项目，我是表达和依赖注入的新手。我开始这个小项目只是为了了解它是如何工作的。我花了几个小时试图理解这个错误，但我没有找到任何相关内容。感谢您的帮助 ！

TypeError: Cannot read properties of undefined (reading 'service')
    at controllerMethod (D:\Projects\Typescript\third\dist\app.controller.js:20:14)
    at Layer.handle [as handle_request] (D:\Projects\Typescript\third\node_modules\express\lib\router\layer.js:95:5)
    at next (D:\Projects\Typescript\third\node_modules\express\lib\router\route.js:144:13)
    at Route.dispatch (D:\Projects\Typescript\third\node_modules\express\lib\router\route.js:114:3)
    at Layer.handle [as handle_request] (D:\Projects\Typescript\third\node_modules\express\lib\router\layer.js:95:5)
    at D:\Projects\Typescript\third\node_modules\express\lib\router\index.js:284:15
    at Function.process_params (D:\Projects\Typescript\third\node_modules\express\lib\router\index.js:346:12)
    at next (D:\Projects\Typescript\third\node_modules\express\lib\router\index.js:280:10)
    at Function.handle (D:\Projects\Typescript\third\node_modules\express\lib\router\index.js:175:3)
    at router (D:\Projects\Typescript\third\node_modules\express\lib\router\index.js:47:12) 

这是代码：

//app.ts
import express, { json, urlencoded } from 'express'
import { APPROUTE } from './app.route'

const app = express()

app.use(json())
app.use(urlencoded({ extended: false }))
app.use(APPROUTE)

app.listen(5000, ()=>{
    console.log(`connected on port 5000`)
})


//app.controller.ts
import { Request, …