trivial plugin to ease the use of the Money gem

README

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+Money
+=====
+
+Description goes here

Rakefile

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+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+desc 'Default: run unit tests.'
+task :default => :test
+
+desc 'Test the money plugin.'
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
+desc 'Generate documentation for the money plugin.'
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title    = 'Money'
+  rdoc.options << '--line-numbers' << '--inline-source'
+  rdoc.rdoc_files.include('README')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end

init.rb

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+require 'acts_as_money'
+
+ActiveRecord::Base.send :include, CollectiveIdea::Acts::Money

install.rb

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+# Install hook code here

lib/acts_as_money.rb

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+require 'money'
+
+module CollectiveIdea #:nodoc:
+  module Acts
+    module Money #:nodoc:
+      def self.included(base) #:nodoc:
+        base.extend ClassMethods
+      end
+
+      module ClassMethods
+        def money(name, options = {})
+          options = {:cents => :cents, :currency => :currency}.merge(options)
+
+          module_eval <<-end_eval
+            composed_of :composed_of_#{name}, :class_name => 'Money',
+              :mapping => [%w(#{options[:cents]} cents), %w(#{options[:currency] || nil} currency)]
+          
+            def #{name}=(part)
+              self.composed_of_#{name} = part.is_a?(Money) ? part : part.to_money
+            end
+            def #{name}(force_reload = false)
+              self.composed_of_#{name} unless #{options[:cents]}.blank?
+            end
+          end_eval
+        end
+      end
+    end
+  end
+end

tasks/money_tasks.rake

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+# desc "Explaining what the task does"
+# task :money do
+#   # Task goes here
+# end

test/money_test.rb

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+require 'test/unit'
+
+class MoneyTest < Test::Unit::TestCase
+  # Replace this with your real tests.
+  def test_this_plugin
+    flunk
+  end
+end