You can easily list given model validators by calling validators
method on the class name:
User.validators # => array of validators
If you define presence validator on your User
model:
class User < ActiveRecord::Base
validates :email, presence: true
end
you can access validator attributes the following way:
email_presence_validator = User.validators.first
email_presence_validator.class # => ActiveRecord::Validations::PresenceValidator
email_presence_validator.attributes # => [:email]
email_presence_validator.options # => {}
The options
method returns options like :if
or :unless
conditions that are passed to the validator definition as extra arguments. Experiment with other types of validations to see how it's working.
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