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Handling with money in Mongoid
class Product
include Mongoid::Document
field :price, type: Money
end
Money.class_eval do
# Converts an object of this instance into a database friendly value.
def mongoize
[cents, currency.to_s]
end
class << self
# Get the object as it was stored in the database, and instantiate
# this custom class from it.
def demongoize(object)
cur = object[1] || Money.default_currency
Money.new(object[0], cur)
end
# Takes any possible object and converts it to how it would be
# stored in the database.
def mongoize(object)
case object
when Money
object.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 Money then object.mongoize
else object
end
end
end
end
product = Product.new(:price => Money.new(1000, 'EUR'))
product.price.format
# => "€10.00"
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