How can I validate data in Sequelize with Node.js?

How can I validate data in Sequelize with Node.js?

You can use built-in validators in Sequelize models, like isEmail, notEmpty, and custom validation functions.

Can you show me an example of using a custom validator?

Sure! You can define a custom validator like this: validate: { isValid(value) { if (!value) throw new Error('Invalid value!'); } }.

What about handling validation errors?

You can catch validation errors in your try-catch block when saving the instance, and handle them accordingly.

Is there a way to validate data before it reaches the database?

Yes, you can use middleware or hooks in Sequelize to validate data before it gets saved to the database.