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Contents
module QDM
# Represents a Quantity
class Quantity
attr_accessor :value, :unit
# Value and unit are required.
def initialize(value, unit)
@value = value
@unit = unit
end
# Converts an object of this instance into a database friendly value.
def mongoize
{ value: @value, unit: @unit, _type: 'QDM::Quantity' }
end
class << self
# Get the object as it was stored in the database, and instantiate
# this custom class from it.
#
# The array elements in demongoize are the same 5 elements used in mongoize, i.e.
# [ value, unit ].
def demongoize(object)
return nil unless object
object = object.symbolize_keys
QDM::Quantity.new(object[:value], object[:unit]) if object.is_a?(Hash)
end
# Takes any possible object and converts it to how it would be
# stored in the database.
def mongoize(object)
case object
when nil then nil
when QDM::Quantity then object.mongoize
when Hash
object = object.symbolize_keys
QDM::Quantity.new(object[:value], object[:unit]).mongoize
else object
end
end
# Converts the object that was supplied to a criteria and converts it
# into a database friendly form.
def evolve(object)
case object
when QDM::Quantity then object.mongoize
else object
end
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems