float.rb

module ActiveModel
  module Type
    class Float < Value # :nodoc:
      include Helpers::Numeric

      def type
        :float
      end

      def type_cast_for_schema(value)
        return "::Float::NAN" if value.try(:nan?)
        case value
        when ::Float::INFINITY then "::Float::INFINITY"
        when -::Float::INFINITY then "-::Float::INFINITY"
        else super
        end
      end

      alias serialize cast

      private

      def cast_value(value)
        case value
        when ::Float then value
        when "Infinity" then ::Float::INFINITY
        when "-Infinity" then -::Float::INFINITY
        when "NaN" then ::Float::NAN
        else value.to_f
        end
      end
    end
  end
end