routing in nodeJs - What could be the reason my routing is not working?

Question

I managed my routing via a few routers, but something went wrong, when i try to call a functton i get the error:

Error: No default engine was specified and no extension was provided.
I can't understand what could be my problem.. I would be greatfull if soembody can help

my code:

// index.js
const express = require("express");
const router = express.Router();

const userRouter = require("./userRouter");
const qeustionRouter = require("./questionRouter");
const questionToTestRouter = require("./questionToTestRouter");
const testRouter = require("./testRouter");
const subjectRouter = require("./subjectRouter");



/* GET home page. */
router.get("/", function (req, res, next) {
res.render("index", { title: "Express is run" });
});

router.get("/user",userRouter);
router.get("/qeustion",qeustionRouter);
router.get("/questionToTest",questionToTestRouter);
router.get("/test",testRouter);
router.get("/subject",subjectRouter);


module.exports = router;

another router for example:

// userRouter.js
const express = require('express');
const router = express.Router();
const userController = require('../controllers/userController');



router.post('/signUp', userController.signUp)
router.get('/login', userController.login)
router.delete('/deleteStudent', userController.deleteStudent)
router.delete('/deleteTeacher', userController.deleteTeacher)
router.get('/getAllUsers', userController.getAllUsers)
router.get('/getStudentsByTeacherId/:teacherId', userController.getStudentsByTeacherId)
router.get('/getTeachersByStudentId/:userId', userController.getTeachersByStudentId)
router.post('/updateUser', userController.updateUser)


module.exports = router

// app.js
var express = require("express");
var cors = require("cors")
const mongoose = require('mongoose');
//var path = require("path");
// var favicon = require("serve-favicon");
// var logger = require("morgan");
// var cookieParser = require("cookie-parser");
var bodyParser = require("body-parser");

var routes = require("./routes/index");

var app = express();

// view engine setup
// app.set("views", path.join(__dirname, "views"));
// app.set("view engine", "jade");

// // uncomment after placing your favicon in /public
// // app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
// app.use(logger("dev"));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
// app.use(cookieParser());
// app.use(express.static(path.join(__dirname, "public")));
app.use(cors());
app.use("/", routes);


//--------------------------------------
//listen to localhost
app.listen(4000, (req, res) => {
  console.log("listening on port 4000");
})
//--------------------------------------

//connect to mongo//
const connectionParams = {
  useNewUrlParser: true,
  // useCreateIndex: true,
  useUnifiedTopology: true
}

mongoose.connect(process.env.DB_CONNECT, connectionParams)
  .then(() =>
    console.log("connected to mongo"))
  .catch((error) =>
    console.log("error: " + error))



// catch 404 and forward to error handler
app.use(function (req, res, next) {
  var err = new Error("Not Found");
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get("env") === "development") {
  app.use(function (err, req, res, next) {
    res.status(err.status || 500);
    res.render("error", {
      message: err.message,
      error: err,
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
  res.status(err.status || 500);
  res.render("error", {
    message: err.message,
    error: {},
  });
});

module.exports = app;

user_14888923 · Answer

I think you need a view engine. I see you are defining "jade" as your view engine but it is commented out and it is not in the index.js

please make sure you installed jade package. You can check this by looking at your package.json file.

npm install jade --save

You need to define jade as your view engine (in the index.js) and your jade files must be stored inside the views folder. Inside index.js file, you can change all router keywords to app

const express = require ("express");
const app = express ();
app.set("view engine","jade")

And delete this: const router = express.Router();

And this folder must be placed at the root of your project (in other words, your index.js file and "views" folder should be at the same level). If you do it in this way, you wont need to define a path route.

I kindly advise you to use "ejs" as your view engine. It is more common than "jade". You can create ejs files easily, just like an html page.

And first start with a single route to test if your express framework is working. You can then gradually add up other routes. And please let me know if this answer helps, otherwise I will delete.

routing in nodeJs - What could be the reason my routing is not working?

1 Answers