javascript - 在 Node.js 中将数据传递到子路由时出现问题

Question

我是 Node.js 新手，并且不断收到错误:Route.get() 需要回调函数，但收到 [object Undefined] 错误

我已经检查了以下问题，但要么不明白，要么我仍然做错了什么

Express routes: .get() requires callback functions but got a [object Object]

.get() requires callback functions but got a [object Undefined]

Error: Route.get() requires callback functions but got a [object Undefined]

Node Route.get() requires callback function but got a [object undefined]

我的文件结构是

server.js
routes/api/geolocations.js
routes/api/geolocations/regions.js
routes/api/geolocations/destination.js

根:server.js

var geolocation = require('./routes/api/geolocation')(app);
app.get('/geolocation/', geolocation.delegate);

然后我使用

将数据传递到routes/api/geolocations.js

geolocation.delegate(unparsedData);

从那里我解析数据并将其发送到适当的子路由。

<小时/>

父级:geolocations.js 在我的routes/api/geolocations.js

   var destination = require('./geolocations/destination');
   var region = require('./geolocations/region');

   module.exports = function(app) {
        return {

      app.get('./geolocation/region', region.delegate);
      app.get('./geolocation/destination', destination.delegate);


            delegate: function(unparsedData, req, res) {


          var data =[setup package for child states using unparsedData]


         //HERE Id like to pass the new `data` to region or destination using the following
         region.delegate(data);
         //OR
         destination.delegate(data);

子项:routes/api/geolocations/regions.js 或routes/api/geolocations/destination.js< 中的region.js/destination.js/

module.exports = function(app) {
    return {
        delegate: function(data, req, res) {

        ...do stuff
   }
 }
}

更新:我想我不知道在 server.js 中设置路线，或者是否可以在 geoloaction.js 中设置路线，这有关系吗，需要在 server.js 中做这样的事情吗？

var regions = require('./routes/api/geolocation/regions')([pass stuff here]);
geolocation.get('./routes/api/geolocation/regions', regions.delegate);

Answer 1

您应该使用express.js轻松设置和运行。

只需下载 IntelliJ IDEA，找到免费版本，然后安装即可。然后运行应用程序并转到"file"->“设置”->“插件”并搜索 NodeJS 然后安装。接下来您需要启用它。为此，请转到文件->设置->语言和框架->打开箭头-> JavaScript打开箭头->库->启用 Node.js Core。

文件结构
路线/api/geolocations.js
路线/api/geolocations/regions.js
路线/api/geolocations/destination.js

您可以查看下面的代码，这可能会帮助您入门。

//------------------------------------------------------------------------
var express = require('express');
var router = express.Router();
var regions = require('../api/geolocations/regions');
var destination = require('../api/geolocations/destination');
//------------------------------------------------------------------------



//------------------------------------------------------------------------
/* geolocation.js */
router.get('/', function(req, res, next) {
    var region_ext = regions.to_export;
    var destin_ext = destination.to_export;

    res.render('index', {
        title: 'Geolocation',
        region: region_ext,
        destination:destin_ext
    });
});
module.exports = router;
//------------------------------------------------------------------------



//------------------------------------------------------------------------
/* region.js */
var to_export = function () {
    return 'this is from regions';
}
module.exports.to_export = to_export();
//------------------------------------------------------------------------



//------------------------------------------------------------------------
/* destination.js */
var to_export = function () {
    return 'this is from destination';
}
module.exports.to_export = to_export();
//------------------------------------------------------------------------


//------------------------------------------------------------------------
//In app.js, just change 
var routes = require('./routes/api/geolocations');
//------------------------------------------------------------------------