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December 21, 2015 00:19
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| require "virtus" | |
| class FinancialDocumentStatus | |
| def initialize(status_string) | |
| @status_string = status_string | |
| end | |
| def settled? | |
| true | |
| end | |
| end | |
| class Payment | |
| include Virtus | |
| attribute :status, FinancialDocumentStatus, writer_class: MapValue(FinancialDocumentStatus) | |
| end | |
| # Generator of writers to simply wrap value into | |
| # desired class | |
| # | |
| # @param [Class] klass | |
| # type to which you want to map your attribute values | |
| # | |
| # @return [Class] | |
| # class which implements Virtus::Attribute::Writer::Coercible API | |
| # | |
| def MapValue(klass) | |
| Class.new(Virtus::Attribute::Writer::Coercible).tap do |writer| | |
| writer.class_eval <<-EOV, __FILE__, __LINE__ + 1 | |
| def coerce(value) | |
| return unless value | |
| #{klass.name}.new(value) | |
| end | |
| EOV | |
| end | |
| end |
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