class Hermod::Validators::TypeChecker

This checks if the given value is an instance of a certain class

def initialize(expected_class, &block)


TypeChecker.new(Date) { |value| value.respond_to? :strftime }

TypeChecker.new(Integer)

Examples

optionally pass a block to customise the class matching logic
Sets up the validator with the class it is expected to be. You can 
def initialize(expected_class, &block)
  @expected_class = expected_class
  @checker = block || proc { |value| value.is_a? expected_class }
end

def message(value, attributes) 

def message(value, attributes)
  expected_class_name = expected_class.name.downcase
  join_word = (%w(a e i o u).include?(expected_class_name[0]) ? "an" : "a")
  "must be #{join_word} #{expected_class_name}"
end

def test(value, attributes) 

def test(value, attributes)
  value.blank? || checker.call(value)
end