module ActiveModel::Validations

person.invalid?(:new) # => true
person.invalid? # => false
person = Person.new

end
validates_presence_of :name, on: :new
attr_accessor :name

include ActiveModel::Validations
class Person

against (the context is defined on the validations using :on).
Context can optionally be supplied to define which callbacks to test

person.invalid? # => false
person.name = 'david'
person.invalid? # => true
person.name = ''
person = Person.new

end
validates_presence_of :name
attr_accessor :name

include ActiveModel::Validations
class Person

added, +false+ otherwise.
Performs the opposite of valid?. Returns +true+ if errors were

def invalid?(context = nil)
  !valid?(context)
end