Checks for errors on
an object (i.e., is resource.errors empty?).
Examples
my_person=Person.create(params[:person])my_person.valid?# => truemy_person.errors.add('login','can not be empty')ifmy_person.login==''my_person.valid?# => false
# File activeresource/lib/active_resource/validations.rb, line 279
def valid?
errors.empty?
end