无法访问中间件内部的app.use()的req.params [英] can't access req.params of app.use() inside middleware

问题描述

我正在尝试为我的应用程序构建动态路由. app.js中的代码如下:

I am trying to build dynamic routes for my application. With the piece of code in app.js looks like this:

app.use('/:c_name/api/',middleware);

中间件如下:

var router = require('express').Router();
router.get('/:m/:c/:a',(req, res, next) => {
console.log(req.params);
var controller = "./fe-ser/leg/fe/cli/"+req.params.c_name+"/main/process/"+req.params.module+"/controllers/"+req.params.controller;
});

现在要解析中间件内部的路由，我需要c_name的值，但无法使用req.params.c_name访问它. req.params仅包含m，c和a.

now to resolve the route inside the middleware, I need the value of c_name but I can't access it using req.params.c_name. req.params only contains m, c and a.

因此，问题是，如何从中间件访问c_name?

Hence, the question, how can I access c_name from my middleware?

推荐答案

在初始化router时，您将需要添加mergeParams，以保留req.params值

You will need to add mergeParams while initializing your router your which will preserve the req.params value

var router = express.Router({mergeParams: true});

希望这会有所帮助！

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