+invalid?+ is simply the inverse of +valid?+. +invalid?+ triggers your validations, returning true if any errors were found in the object, and false otherwise.
h4. Strict Validations
Rails can also be specify strict validations. You can use the +:strict+ option to set that validation as strict. If an object fails a strict validation then an +ActiveModel::StrictValidationFailed+ error message is raised.
<ruby>
class Person < ActiveRecord::Base
validates :name, :presence => {:strict => true}
end
>> p = Person.new
>> p.valid?
=> ActiveModel::StrictValidationFailed: can't be blank
</ruby>
h4(#validations_overview-errors). +errors[]+
To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+. It returns an array of all the errors for +:attribute+. If there are no errors on the specified attribute, an empty array is returned.
