Express v4路由器为类

如何解决Express v4路由器为类

应用程序编译无误,并说服务器在正确的端口上启动。但是,当我去任何一条注册的路线时,都会收到一条无法访问此路线的错误消息。

我还没有找到关于Express与类的更多信息,尤其是路由器部分。从router变量的console.log(controller.router)看来是正确的,缺少它的路径很奇怪,但是我认为正则表达式代替了。

this.router实例上也没有path方法,所以我不确定get(path,handler)以外的其他路径。

console.log(`/v1${controller.basePath}`,controller.router):

""""
/v1/users [Function: router] {
  params: {},_params: [],caseSensitive: undefined,mergeParams: undefined,strict: undefined,stack: [
    Layer {
      handle: [Function: bound dispatch],name: 'bound dispatch',params: undefined,path: undefined,keys: [],regexp: /^\/users\/?$/i,route: [Route]
    },Layer {
      handle: [Function: bound dispatch],keys: [Array],regexp: /^\/users\/(?:([^\/]+?))\/?$/i,route: [Route]
    }
  ]
}
"""

我也尝试使用localhost:1337/v1/users/,以防万一,但同样的事情也会发生。

我不知道该怎么办,谢谢您的提前帮助!

应用程序类

import * as express from "express"
import * as mongoose from "mongoose"
import * as bodyParser from "body-parser"

mongoose.connect("mongodb://localhost:27017/socketpro",{
    useUnifiedTopology: true,useNewUrlParser: true,useCreateIndex: true,})

class App {
    public port: number
    public app: express.Application

    private controllers: any

    constructor(controllers: any,port: number) {
        this.port = port
        this.controllers = controllers
        this.app = express()

        this.initializeMiddlewares()
        this.initializeControllers()
    }

    private initializeMiddlewares() {
        this.app.use(bodyParser.json())
    }

    private initializeControllers() {
        this.controllers.forEach((controller: any) => {
            console.log(`/v1${controller.basePath}`,controller.router)
            this.app.use(`/v1${controller.basePath}`,controller.router)
        })
    }

    public listen() {
        this.app.listen(this.port,() => {
            console.log(`App listening on the port ${this.port}`)
        })
    }
}

export default App

用户控制器

import { UserModel as User,UserInterface } from "../Utils/User"
import { Router,Request,Response } from "express"

export default class UsersController {
    [x: string]: any

    public basePath = "/users"
    public router: Router = null

    private posts: UserInterface[] = []

    constructor() {
        this.router = Router()
        this.intializeRoutes()
    }

    public intializeRoutes() {
        let routes = [
            {
                path: "/",method: "get",function: "GetUsers",},{
                path: "/",method: "post",function: "CreateUser",{
                path: "/:id",function: "GetUser",function: "UpdateUser",]

        routes.map((route) => {
            let path = `${this.basePath}${route.path ?? ""}`

            switch (route.method) {
                case "get":
                    this.router.get(path,this[route.function])
                    break
                case "post":
                    this.router.post(path,this[route.function])
                    break
            }
        })
    }

    async GetUser(request: Request,response: Response) {
        let userId: string = request.params.id

        let user = await User.findOne({
            _id: userId,})

        response.send({
            user,})
    }

    async GetUsers(request: Request,response: Response) {
        response.send({status: true})
    }

    async CreateUser(request: Request,response: Response) {
        let user: UserInterface = new User(request.body)

        user = await user.save()

        response.send(user)
    }

    async UpdateUser(request: Request,response: Response) {
        let body: UserInterface = request.body

        await User.updateOne(
            {
                _id: request.params.id,body
        ).exec()

        response.send({
            status: true,})
    }
}

代码回购:https://github.com/Rusherz/express-router-class

Chrome URL showing: localhost:1337/v1/users and the error: Cannot GET /v1/users

解决方法

我的代码的问题是范围界定,或者我认为是范围界定。

我发现我基于https://dev.to/aligoren/developing-an-express-application-using-typescript-3b1

代码存在的问题是控制器文件中的

async GetUser(request: Request,response: Response) {
    let userId: string = request.params.id

    let user = await User.findOne({
        _id: userId,})

    response.send({
        user,})
}

代替:

GetUser = async (request: Request,response: Response) => {
    let userId: string = request.params.id

    let user = await User.findOne({
        _id: userId,})
}

另一种解决方案是更改:

switch (route.method) {
    case "get":
        this.router.get(path,this[route.function])
        break
    case "post":
        this.router.post(path,this[route.function])
        break
}

收件人:

switch (route.method) {
    case "get":
        this.router.get(path,this[route.function].bind(this))
        break
    case "post":
        this.router.post(path,this[route.function].bind(this))
        break
}

以防万一将来有人遇到与我类似的问题。

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