How can I create custom validation messages in Ruby?

How can I create custom validation messages in Ruby?

You can create custom validation messages in Ruby on Rails by using the validates method with the message option.

Can you give me an example of that?

Sure! For instance, you can write validates :name, presence: { message: 'Name cannot be blank' } in your model.

What if I want to use I18n for translations?

You can use I18n by defining your messages in the locale files and referencing them like this: validates :name, presence: { message: :blank }.

Is there a way to customize error messages for different validations?

Yes, you can specify different messages for each validation type by using the message option for each validation.