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App works locally but getteting error on heroku

Time：01-06

I'm working on an amazon clone app from a turorial. It works locally and it will deploy to heroku with no errors but I get a Module Not Found for the productsController.

The file structure is

├── backend
|   ├── config
│   ├── controllers
│   │   ├── productController.js
│   ├── models
│   ├── routes
│   │   ├── productRoutes.js
│   ├── server.js

Here is the heroku error log:

2023-01-06T01:09:09.693860 00:00 app[web.1]: ^
2023-01-06T01:09:09.693860 00:00 app[web.1]:
2023-01-06T01:09:09.693861 00:00 app[web.1]: Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/app/backend/controllers/productController.js' imported from /app/backend/routes/productRoutes.js
2023-01-06T01:09:09.693861 00:00 app[web.1]: at new NodeError (node:internal/errors:393:5)
2023-01-06T01:09:09.693862 00:00 app[web.1]: at finalizeResolution (node:internal/modules/esm/resolve:323:11)
2023-01-06T01:09:09.693862 00:00 app[web.1]: at moduleResolve (node:internal/modules/esm/resolve:916:10)
2023-01-06T01:09:09.693862 00:00 app[web.1]: at defaultResolve (node:internal/modules/esm/resolve:1124:11)
2023-01-06T01:09:09.693863 00:00 app[web.1]: at nextResolve (node:internal/modules/esm/loader:163:28)
2023-01-06T01:09:09.693863 00:00 app[web.1]: at ESMLoader.resolve (node:internal/modules/esm/loader:841:30)
2023-01-06T01:09:09.693863 00:00 app[web.1]: at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
2023-01-06T01:09:09.693864 00:00 app[web.1]: at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:40)
2023-01-06T01:09:09.693875 00:00 app[web.1]: at link (node:internal/modules/esm/module_job:75:36) {
2023-01-06T01:09:09.693875 00:00 app[web.1]: code: 'ERR_MODULE_NOT_FOUND'
2023-01-06T01:09:09.693875 00:00 app[web.1]: }
2023-01-06T01:09:09.693880 00:00 app[web.1]:
2023-01-06T01:09:09.693880 00:00 app[web.1]: Node.js v18.12.1
2023-01-06T01:09:09.881953 00:00 heroku[web.1]: Process exited with status 1       
2023-01-06T01:09:09.926097 00:00 heroku[web.1]: State changed from starting to crashed
2023-01-06T01:09:09.936162 00:00 heroku[web.1]: State changed from crashed to starting
2023-01-06T01:09:18.922072 00:00 heroku[web.1]: Starting process with command `npm start`
2023-01-06T01:09:20.986680 00:00 app[web.1]:
2023-01-06T01:09:20.986716 00:00 app[web.1]: > [email protected] start
2023-01-06T01:09:20.986716 00:00 app[web.1]: > node backend/server.js
2023-01-06T01:09:20.986717 00:00 app[web.1]:
2023-01-06T01:09:21.087388 00:00 app[web.1]: node:internal/errors:484
2023-01-06T01:09:21.087389 00:00 app[web.1]: ErrorCaptureStackTrace(err);
2023-01-06T01:09:21.087390 00:00 app[web.1]: ^
2023-01-06T01:09:21.087390 00:00 app[web.1]:
2023-01-06T01:09:21.087391 00:00 app[web.1]: Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/app/backend/controllers/productController.js' imported from /app/backend/routes/productRoutes.js
2023-01-06T01:09:21.087391 00:00 app[web.1]: at new NodeError (node:internal/errors:393:5)
2023-01-06T01:09:21.087392 00:00 app[web.1]: at finalizeResolution (node:internal/modules/esm/resolve:323:11)
2023-01-06T01:09:21.087392 00:00 app[web.1]: at moduleResolve (node:internal/modules/esm/resolve:916:10)
2023-01-06T01:09:21.087392 00:00 app[web.1]: at defaultResolve (node:internal/modules/esm/resolve:1124:11)
2023-01-06T01:09:21.087393 00:00 app[web.1]: at nextResolve (node:internal/modules/esm/loader:163:28)
2023-01-06T01:09:21.087393 00:00 app[web.1]: at ESMLoader.resolve (node:internal/modules/esm/loader:841:30)
2023-01-06T01:09:21.087393 00:00 app[web.1]: at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
2023-01-06T01:09:21.087394 00:00 app[web.1]: at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:40)
2023-01-06T01:09:21.087395 00:00 app[web.1]: at link (node:internal/modules/esm/module_job:75:36) {
2023-01-06T01:09:21.087396 00:00 app[web.1]: code: 'ERR_MODULE_NOT_FOUND'
2023-01-06T01:09:21.087396 00:00 app[web.1]: }
2023-01-06T01:09:21.087426 00:00 app[web.1]:
2023-01-06T01:09:21.087427 00:00 app[web.1]: Node.js v18.12.1
2023-01-06T01:09:21.248317 00:00 heroku[web.1]: Process exited with status 1       
2023-01-06T01:09:21.315476 00:00 heroku[web.1]: State changed from starting to crashed
2023-01-06T01:09:23.209214 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=mern-amazona2-judo2000.herokuapp.com request_id=dd865b46-6a9f-478d-87ea-bfef1a20773d fwd="136.144.43.249" dyno= connect= service= status=503 bytes= protocol=https
2023-01-06T01:09:23.521669 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=mern-amazona2-judo2000.herokuapp.com request_id=2c983834-c3e2-4a60-b39a-f55ecf4fa2fd fwd="172.98.33.99" dyno= connect= service=
 status=503 bytes= protocol=https
2023-01-06T01:11:30.804412 00:00 heroku[web.1]: State changed from crashed to starting
2023-01-06T01:11:39.211361 00:00 heroku[web.1]: Starting process with command `npm start`
2023-01-06T01:11:41.347517 00:00 app[web.1]:
2023-01-06T01:11:41.347544 00:00 app[web.1]: > [email protected] start
2023-01-06T01:11:41.347544 00:00 app[web.1]: > node backend/server.js
2023-01-06T01:11:41.347545 00:00 app[web.1]:
2023-01-06T01:11:41.460279 00:00 app[web.1]: node:internal/errors:484
2023-01-06T01:11:41.460280 00:00 app[web.1]: ErrorCaptureStackTrace(err);
2023-01-06T01:11:41.460281 00:00 app[web.1]: ^
2023-01-06T01:11:41.460281 00:00 app[web.1]:
2023-01-06T01:11:41.460281 00:00 app[web.1]: Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/app/backend/controllers/productController.js' imported from /app/backend/routes/productRoutes.js
2023-01-06T01:11:41.460282 00:00 app[web.1]: at new NodeError (node:internal/errors:393:5)
2023-01-06T01:11:41.460282 00:00 app[web.1]: at finalizeResolution (node:internal/modules/esm/resolve:323:11)
2023-01-06T01:11:41.460283 00:00 app[web.1]: at moduleResolve (node:internal/modules/esm/resolve:916:10)
2023-01-06T01:11:41.460283 00:00 app[web.1]: at defaultResolve (node:internal/modules/esm/resolve:1124:11)
2023-01-06T01:11:41.460283 00:00 app[web.1]: at nextResolve (node:internal/modules/esm/loader:163:28)
2023-01-06T01:11:41.460285 00:00 app[web.1]: at ESMLoader.resolve (node:internal/modules/esm/loader:841:30)
2023-01-06T01:11:41.460285 00:00 app[web.1]: at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
2023-01-06T01:11:41.460285 00:00 app[web.1]: at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:76:40)
2023-01-06T01:11:41.460285 00:00 app[web.1]: at link (node:internal/modules/esm/module_job:75:36) {
2023-01-06T01:11:41.460286 00:00 app[web.1]: code: 'ERR_MODULE_NOT_FOUND'
2023-01-06T01:11:41.460286 00:00 app[web.1]: }
2023-01-06T01:11:41.460297 00:00 app[web.1]:
2023-01-06T01:11:41.460298 00:00 app[web.1]: Node.js v18.12.1
2023-01-06T01:11:41.609123 00:00 heroku[web.1]: Process exited with status 1       
2023-01-06T01:11:41.742528 00:00 heroku[web.1]: State changed from starting to crashed
2023-01-06T01:11:42.461013 00:00 heroku[web.1]: State changed from crashed to starting
2023-01-06T01:11:52.618745 00:00 heroku[web.1]: Starting process with command `npm start`
2023-01-06T01:11:54.470268 00:00 app[web.1]:
2023-01-06T01:11:54.470310 00:00 app[web.1]: > [email protected] start
2023-01-06T01:11:54.470311 00:00 app[web.1]: > node backend/server.js
2023-01-06T01:11:54.470311 00:00 app[web.1]:
2023-01-06T01:11:54.565973 00:00 app[web.1]: node:internal/errors:484
2023-01-06T01:11:54.565975 00:00 app[web.1]: ErrorCaptureStackTrace(err);
2023-01-06T01:11:54.565975 00:00 app[web.1]: ^
2023-01-06T01:11:54.565976 00:00 app[web.1]:
2023-01-06T01:11:54.565977 00:00 app[web.1]: Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/app/backend/controllers/productController.js' imported from /app/backend/routes/productRoutes.js
2023-01-06T01:11:54.565986 00:00 app[web.1]: at new NodeError (node:internal/errors:393:5)
2023-01-06T01:11:54.565986 00:00 app[web.1]: at finalizeResolution (node:internal/modules/esm/resolve:323:11)
2023-01-06T01:11:54.565986 00:00 app[web.1]: at moduleResolve (node:internal/modules/esm/resolve:916:10)
2023-01-06T01:11:54.565987 00:00 app[web.1]: at defaultResolve (node:internal/modules/esm/resolve:1124:11)
2023-01-06T01:11:54.565987 00:00 app[web.1]: at nextResolve (node:internal/modules/esm/loader:163:28)
2023-01-06T01:11:54.565987 00:00 app[web.1]: at ESMLoader.resolve (node:internal/modules/esm/loader:841:30)
2023-01-06T01:11:54.565987 00:00 app[web.1]: at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
2023-01-06T01:11:54.565993 00:00 app[web.1]: Node.js v18.12.12023-01-06T01:11:54.697714 00:00 heroku[web.1]: Process exited with status 1       
2023-01-06T01:11:54.792281 00:00 heroku[web.1]: State changed from starting to crashed
2023-01-06T01:11:55.983110 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=mern-amazona2-judo2000.herokuapp.com request_id=e373b75d-6a72-432d-9709-29e6c62063bd fwd="173.239.224.8" dyno= connect= service= status=503 bytes= protocol=https
2023-01-06T01:11:56.274300 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=mern-amazona2-judo2000.herokuapp.com request_id=368733e0-a442-422d-97a1-1c3e0bc7681f fwd="173.239.224.10" dyno= connect= service= status=503 bytes= protocol=https
2023-01-06T01:11:30.571160 00:00 app[api]: Release v21 created by user [email protected]
2023-01-06T01:11:30.571160 00:00 app[api]: Remove MONGO_URI config vars by user [email protected]
2023-01-06T01:11:42.194061 00:00 app[api]: Set MONGODB_URI config vars by user [email protected]
2023-01-06T01:11:42.194061 00:00 app[api]: Release v22 created by user [email protected]

Here is the server.js

import express from 'express';
import path from 'path';
import dotenv from 'dotenv';
import connectDB from './config/connection.js';

import seedRoutes from './routes/seedRoutes.js';
import productRoutes from './routes/productRoutes.js';
import userRoutes from './routes/userRoutes.js';
import orderRoutes from './routes/orderRoutes.js';

dotenv.config();

connectDB();

const app = express();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.get('/api/keys/paypal', (req, res) => {
  res.send(process.env.PAYPAL_CLIENT_ID || 'sb');
});

app.use('/api/seed', seedRoutes);
app.use('/api/products', productRoutes);
app.use('/api/users', userRoutes);
app.use('/api/orders', orderRoutes);

const __dirname = path.resolve();
app.use(express.static(path.join(__dirname, '/frontend/build')));

app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, '/frontend/build/index.html'));
});

app.use((err, req, res, next) => {
  res.status(500).send({ message: err.message });
});

const port = process.env.PORT || 5000;
app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});

Here is the productRoutes.js

import express, { Router } from 'express';
const router = express.Router();
import {
  getProducts,
  getProductBySlug,
  getProductById,
} from '../controllers/productController.js';

router.route('/').get(getProducts);
router.route('/slug/:slug').get(getProductBySlug);
router.route('/:id').get(getProductById);

export default router;

And here is the productController

import Product from '../models/ProductModel.js';

const getProducts = async (req, res) => {
  const products = await Product.find({});
  res.send(products);
};

const getProductBySlug = async (req, res) => {
  const product = await Product.findOne({ slug: req.params.slug });

  if (product) {
    res.send(product);
  } else {
    res.status(404).send({ message: 'Product Not Found' });
  }
};

const getProductById = async (req, res) => {
  const product = await Product.findById(req.params.id);
  if (product) {
    res.send(product);
  } else {
    res.status(404).send({ message: 'Product not found.' });
  }
};

export { getProducts, getProductBySlug, getProductById };

CodePudding user response：

You have a path mis-match. Change controllers to controller or vise-versa (whichever is true).

  • The error is: Cannot find module '/app/backend/controllers/productController.js'

  • and your path is: /app/backend/controller/productController.js

Page link：https//www.codepudding.com/net/664287.html

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