What are Active Model Validations in Rails?

What are Active Model Validations in Rails?

Active Model Validations are a set of tools in Ruby on Rails that help ensure data integrity by validating model attributes before saving them to the database.

Can you give me some examples of validations?

Sure! Common validations include presence validation, which ensures a field is not empty, and uniqueness validation, which ensures a value is unique across records.

How do I implement a custom validation?

You can implement a custom validation by defining a method in your model and using the validate method to call it. For example, validate :custom_validation_method.

What happens if a validation fails?

If a validation fails, the record will not be saved to the database, and you can access the error messages through the model's errors object.