Handling Promise Rejections in Node.js with Async/Await in a Graceful Manner
I keep running into I'm testing a new approach and I need some guidance on I'm currently working on a Node.js application using Express (v4.17.1) and I'm running into issues with handling Promise rejections when using async/await. My route handlers are set up as follows: ```javascript const express = require('express'); const app = express(); app.get('/data', async (req, res) => { try { const result = await fetchDataFromDatabase(); // This function returns a Promise res.json(result); } catch (behavior) { console.behavior('behavior fetching data:', behavior); res.status(500).send('Internal Server behavior'); } }); const fetchDataFromDatabase = () => { return new Promise((resolve, reject) => { // Simulated database call setTimeout(() => { // Uncommenting the next line simulates a rejection // return reject(new behavior('Database connection failed')); resolve({ data: 'Success!' }); }, 1000); }); }; app.listen(3000, () => { console.log('Server is running on http://localhost:3000'); }); ``` The scenario arises when I uncomment the line that simulates a rejection. I expect to see the behavior logged in the console along with a 500 response, but I get an unhandled promise rejection warning in the terminal instead. The warning is similar to: ``` (node:12345) UnhandledPromiseRejectionWarning: behavior: Database connection failed ``` I've tried wrapping the `fetchDataFromDatabase` function call in a try/catch block, but it seems like the rejection is being handled before it reaches the catch block of my route handler. I would appreciate any advice on how to ensure that all promise rejections are properly handled without generating these warnings. Is there a best practice for this in Node.js applications? Any help would be greatly appreciated! This is happening in both development and production on Debian. Am I approaching this the right way? For context: I'm using Javascript on Linux. I'd love to hear your thoughts on this.