Error Handling in Node.js with Sequelize: 'Validation Error' Not Triggering Properly
I'm collaborating on a project where I've looked through the documentation and I'm still confused about I tried several approaches but none seem to work. I'm currently working on a Node.js application using Sequelize (version 6.6.2) for ORM with PostgreSQL. I've set up a model for user registration, and I'm trying to handle validation errors that occur when a user tries to register with an email that already exists in the database. However, I'm seeing that the error is not being caught as I expect. Instead, the application crashes with an unhandled rejection when I attempt to create a new user with a duplicate email. Here’s the relevant part of my code: ```javascript const { User } = require('./models'); app.post('/register', async (req, res) => { try { const user = await User.create({ email: req.body.email, password: req.body.password }); return res.status(201).json(user); } catch (error) { console.error('Error during user registration:', error); return res.status(400).json({ message: error.message }); } }); ``` The Sequelize model has a unique constraint on the email field: ```javascript const User = sequelize.define('User', { email: { type: Sequelize.STRING, allowNull: false, unique: true, validate: { isEmail: true } }, password: { type: Sequelize.STRING, allowNull: false } }); ``` When I try to register a user with an email that already exists, I'm expecting the catch block to execute and return a 400 status code. Instead, I see an error message like 'UnhandledPromiseRejectionWarning: SequelizeUniqueConstraintError: Validation error'. I've tried adding an error logging statement in both the catch block and a global error handler, but I still can't seem to capture this error properly. I've also checked the Sequelize documentation but couldn't find specific guidance on how to handle such cases effectively. Is there a best practice for managing validation errors in Sequelize, especially for unique constraints? Any advice on how to prevent this unhandled rejection would be greatly appreciated! My development environment is Ubuntu 20.04. Any ideas what could be causing this? I'd be grateful for any help.