Express.js Route configuration guide After Middleware Execution - Status 404 scenarios
I'm wondering if anyone has experience with I'm trying to debug I'm having trouble with I'm currently working on an Express.js application and working with an scenario where a specific route returns a 404 status even though the corresponding middleware function executes correctly. I have a route defined for `/api/users/:id`, and I expect to retrieve user details based on the provided ID. Here's a simplified version of my setup: ```javascript const express = require('express'); const app = express(); const PORT = process.env.PORT || 3000; // Middleware to check if user exists app.use('/api/users/:id', (req, res, next) => { const userId = req.params.id; // Simulating a user check, assuming we have a function `getUserById` if (userId === '123') { req.user = { id: '123', name: 'John Doe' }; // User found next(); } else { return res.status(404).send('User not found'); // User not found } }); // Route to get user details app.get('/api/users/:id', (req, res) => { // This code never executes for unknown reasons res.json(req.user); }); app.listen(PORT, () => { console.log(`Server is running on port ${PORT}`); }); ``` When I send a request to `/api/users/123`, it works as expected, and I get the user details. However, if I send a request to `/api/users/456`, I see the middleware returning 'User not found', but I never reach the route handler, and it seems like a 404 is returned instead. I've tried moving the middleware directly into the route definition, but the behavior doesn’t change. Is there something I might be missing regarding middleware execution or route handling in Express? I'm using Express version 4.17.1 and Node.js version 14.17.0. Any insights or suggestions to ensure I reach the route handler properly would be greatly appreciated! The stack includes Javascript and several other technologies. Thanks for taking the time to read this! I appreciate any insights! Thanks for any help you can provide!