快速-试图模仿控制器.Get Router.use(）需要回调函数，但出现了[object String]错误

Express - Trying to imitate controllers. Got Router.use() requires callback functions but got a [object String] error

本文关键字：函数 回调 错误 String object 控制器 Get use Router 快速      更新时间：2023-09-26

我正在尝试在Node.js和Express框架中创建控制器。我已经创建了app.js、routes/index.js和controller/index.js。

以下是每个文件的代码：

var express = require("express"),
    path = require("path"),
    indexRoutes = require("./routes/index");
var app = express();
app.use("view engine", "ejs");
app.use("views", path.join(__dirname, "views"));
app.use("/", indexRoutes);
var port = process.env.PORT || 3000;
app.listen(port, function() {
    console.log("listening to port " + port);
});

和routes/index.js:

var express = require("express");
var controller = require("../controller/index");
var router = express.Router();
router.get("/", controller.index);
router.get("/list", controller.list);
module.exports = router;

和controller/index.js:

var indexController = {
    index: function(req, res) {
        res.send("index action");
    }, 
    list: function(req, res) {
        res.send("list action");
    }
}
module.exports = indexController;

当我运行服务器时。我在我的终端中收到这个错误：

Error: Router.use() requires callback functions but got a [object String]
    at Function.proto.use (/media/misc/www/expself/node_modules/express/lib/router/index.js:327:11)
    at Function.app.use (/media/misc/www/expself/node_modules/express/lib/application.js:195:16)
    at Object.<anonymous> (/media/misc/www/expself/app.js:7:5)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:906:3

有什么帮助吗？我是node.js 的初学者

这些：

app.use("view engine", "ejs");
app.use("views", path.join(__dirname, "views"));

应为：

app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

app.use()仅适用于中间件。

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