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资源说明：Create virtual attributes on ActiveRecord models for accessing money values stored in pence/cents as an int as decimals. Rails validation compatible.
Decimalizer
===========
Create virtual attributes on ActiveRecord models for accessing money values stored in pence/cents as an int as decimals. Rails validation compatible.
Installation
============
Rails 2.1 or greater
--------------------
To install the gem, Rails 2.1 or later, add the gem.config line in environment.rb as follows
Rails::Initializer.run do |config|
...
config.gem "miletbaker-decimalizer", :lib => "decimalizer", :source => "http://gems.github.com"
...
end
then
sudo rake gems:install
Earlier versions of Rails and other Ruby frameworks
----------------------------------------------
To install the gem
gem sources -a http://gems.github.com
sudo gem install miletbaker-decimalizer
To install as a plugin (Rails)
cd into your Rails root folder
script/plugin install git://github.com/miletbaker/decimalizer.git
Then require the library where needed, i.e. in environment.rb in older rails
require 'decimalizer'
Example
=======
Just include Decimalizer in your model (where required)
class MyModel < ActiveRecord::Base
include Decimalizer
decimalize :price # Monetary amount stored in pence / cents
end
Then you will be able to access price as a decimal via the generated virtual attributes
m = MyModel.new
m.price = 2300
m.price_as_decimal # 23.00
You can pass in the value from a view
m = MyModel.new({price_as_decimal => "45.99"})
m.price # 4599
You can also use this virtual attribute with ActiveRecord validations, i.e.
class MyModel < ActiveRecord::Base
...
validates_numericality_of :price_as_decimal, :message => "is not a valid price"
...
end
Copyright (c) 2009 Go Tripod Ltd, released under the MIT license
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