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module AttrOptional
def self.included(klass)
klass.send :extend, ClassMethods
end
module ClassMethods
def inherited(klass)
super
unless optional_attributes.empty?
klass.attr_optional *optional_attributes
end
end
def attr_optional(*keys)
if defined? undef_required_attributes
undef_required_attributes *keys
end
optional_attributes.concat(keys)
attr_accessor *keys
end
def attr_optional?(key)
optional_attributes.include?(key)
end
def optional_attributes
@optional_attributes ||= []
end
def undef_optional_attributes(*keys)
keys.each do |key|
if attr_optional?(key)
undef_method key, :"#{key}="
optional_attributes.delete key
end
end
end
end
def optional_attributes
self.class.optional_attributes
end
def attr_optional?(key)
self.class.attr_optional? key
end
end
|
