mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
14fc8b3452
This feature adds a lot of complication to ActiveRecord for dubious
value. Let's talk about what it does currently:
class Customer < ActiveRecord::Base
composed_of :balance, :class_name => "Money", :mapping => %w(balance amount)
end
Instead, you can do something like this:
def balance
@balance ||= Money.new(value, currency)
end
def balance=(balance)
self[:value] = balance.value
self[:currency] = balance.currency
@balance = balance
end
Since that's fairly easy code to write, and doesn't need anything
extra from the framework, if you use composed_of today, you'll
have to add accessors/mutators like that.
Closes #1436
Closes #2084
Closes #3807
70 lines
1.4 KiB
Ruby
70 lines
1.4 KiB
Ruby
class Customer < ActiveRecord::Base
|
|
cattr_accessor :gps_conversion_was_run
|
|
end
|
|
|
|
class Address
|
|
attr_reader :street, :city, :country
|
|
|
|
def initialize(street, city, country)
|
|
@street, @city, @country = street, city, country
|
|
end
|
|
|
|
def close_to?(other_address)
|
|
city == other_address.city && country == other_address.country
|
|
end
|
|
|
|
def ==(other)
|
|
other.is_a?(self.class) && other.street == street && other.city == city && other.country == country
|
|
end
|
|
end
|
|
|
|
class Money
|
|
attr_reader :amount, :currency
|
|
|
|
EXCHANGE_RATES = { "USD_TO_DKK" => 6, "DKK_TO_USD" => 0.6 }
|
|
|
|
def initialize(amount, currency = "USD")
|
|
@amount, @currency = amount, currency
|
|
end
|
|
|
|
def exchange_to(other_currency)
|
|
Money.new((amount * EXCHANGE_RATES["#{currency}_TO_#{other_currency}"]).floor, other_currency)
|
|
end
|
|
end
|
|
|
|
class GpsLocation
|
|
attr_reader :gps_location
|
|
|
|
def initialize(gps_location)
|
|
@gps_location = gps_location
|
|
end
|
|
|
|
def latitude
|
|
gps_location.split("x").first
|
|
end
|
|
|
|
def longitude
|
|
gps_location.split("x").last
|
|
end
|
|
|
|
def ==(other)
|
|
self.latitude == other.latitude && self.longitude == other.longitude
|
|
end
|
|
end
|
|
|
|
class Fullname
|
|
attr_reader :first, :last
|
|
|
|
def self.parse(str)
|
|
return nil unless str
|
|
new(*str.to_s.split)
|
|
end
|
|
|
|
def initialize(first, last = nil)
|
|
@first, @last = first, last
|
|
end
|
|
|
|
def to_s
|
|
"#{first} #{last.upcase}"
|
|
end
|
|
end
|