Basics of Active Record Validations - DEV Community

Our applications do not exist in a vacuum. We will ideally have real people using and interacting with our programs constantly. In a perfect world, everyone would know our intentions as developers when asking for user input in things like a username, email, phone number, etc. However, our intentions are not always clear, and our users will inevitably make mistakes like forgetting a digit in their phone number or leaving a username field blank.