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module Validatable
module Requireable #:nodoc:
module ClassMethods #:nodoc:
def requires(*args)
required_options.concat args
end
def required_options
@required_options ||= []
end
end
def self.included(klass)
klass.extend ClassMethods
end
def requires(options)
required_options = self.class.required_options.inject([]) do |errors, attribute|
errors << attribute.to_s unless options.has_key?(attribute)
errors
end
raise ArgumentError.new("#{self.class} requires options: #{required_options.join(', ')}") if required_options.any?
true
end
end
end
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