Initial commit.

.gitignore

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+pkg/*
+*.gem
+.bundle

Gemfile

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+source "http://rubygems.org"
+
+# Specify your gem's dependencies in attr_bucket.gemspec
+gemspec

LICENSE

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+Copyright (c) 2011 Ernie Miller
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.rdoc

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+= attr_bucket
+
+This is probably a horrible idea.
+
+== Copyright
+
+Copyright (c) 2011 {Ernie Miller}[http://metautonomo.us]. See LICENSE for details.

Rakefile

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+require 'bundler'
+Bundler::GemHelper.install_tasks

attr_bucket.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+require "attr_bucket/version"
+
+Gem::Specification.new do |s|
+  s.name        = "attr_bucket"
+  s.version     = AttrBucket::VERSION
+  s.platform    = Gem::Platform::RUBY
+  s.authors     = ["Ernie Miller"]
+  s.email       = ["ernie@metautonomo.us"]
+  s.homepage    = "http://metautonomo.us"
+  s.summary     = %q{This is probably a horrible idea.}
+  s.description = %q{A really, really, horrible idea.}
+
+  s.add_runtime_dependency(%q<activerecord>, ["~> 3.0.0"])
+
+  s.rubyforge_project = "attr_bucket"
+
+  s.files         = `git ls-files`.split("\n")
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+end

lib/attr_bucket.rb

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+module AttrBucket
+  def self.included(base)
+    base.extend ClassMethods
+  end
+
+  private
+
+  def get_attr_bucket(name)
+    unless read_attribute(name).is_a?(Hash)
+      write_attribute(name, {})
+    end
+    read_attribute(name)
+  end
+
+  def explicitly_type_cast(value, type)
+    return nil if value.nil?
+    case type
+      when :string    then value.to_s
+      when :text      then value.to_s
+      when :integer   then value.to_i rescue value ? 1 : 0
+      when :float     then value.to_f
+      when :decimal   then self.class.value_to_decimal(value)
+      when :datetime  then self.class.string_to_time(value)
+      when :timestamp then self.class.string_to_time(value)
+      when :time      then self.class.string_to_dummy_time(value)
+      when :date      then self.class.string_to_date(value)
+      when :binary    then self.class.binary_to_string(value)
+      when :boolean   then self.class.value_to_boolean(value)
+      else value
+    end
+  end
+
+  module ClassMethods
+    private
+
+    def attr_bucket(opts = {})
+      opts.map do |bucket_name, attrs|
+        serialize bucket_name, Hash
+
+        if attrs.is_a?(Hash)
+          attrs.map do|attr_name, attr_type|
+            define_bucket_reader bucket_name, attr_name
+            define_bucket_writer bucket_name, attr_name, attr_type
+          end
+        else
+          Array.wrap(attrs).each do |attr_name|
+            define_bucket_reader bucket_name, attr_name
+            define_bucket_writer bucket_name, attr_name, :string
+          end
+        end
+      end
+    end
+
+    def define_bucket_reader(bucket_name, attr_name)
+      define_method attr_name do
+        get_attr_bucket(bucket_name)[attr_name]
+      end unless method_defined? attr_name
+    end
+
+    def define_bucket_writer(bucket_name, attr_name, attr_type)
+      define_method "#{attr_name}=" do |val|
+        # TODO: Make this more resilient/granular for multiple bucketed changes
+        send("#{bucket_name}_will_change!")
+        get_attr_bucket(bucket_name)[attr_name] = explicitly_type_cast(val, attr_type)
+      end unless method_defined? "#{attr_name}="
+    end
+  end
+end
+
+require 'active_record'
+
+ActiveRecord::Base.send(:include, AttrBucket)

lib/attr_bucket/version.rb

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+module AttrBucket
+  VERSION = "0.1.0"
+end