First commit: partially working, partially tested

.gitignore

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+.DS_Store
+*.gem
+tmp
+
+spec/fixtures/database.yml
+spec/fixtures/*.log

CHANGELOG.markdown

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+Version 0.1.0
+-------------
+
+* 

MIT-LICENSE

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+Copyright (c) 2009 Winton Welsh
+
+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.markdown

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+GemTemplate
+===========
+
+A gem template for new projects.
+
+Setup
+-----
+
+<pre>
+git clone git://github.com/winton/acts_as_archive.git my_project
+cd my_project
+rm -Rf .git
+git init
+git remote add origin git@github.com:winton/my_project.git
+</pre>
+
+Rename these files/folders:
+
+<pre>
+ls **/acts_as_archive*
+</pre>
+
+Do a project-wide find/replace on <code>acts_as_archive</code>.

Rakefile

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+require 'rake'
+
+GEM_NAME = 'acts_as_archive'
+task :default => "#{GEM_NAME}.gemspec"
+
+file "#{GEM_NAME}.gemspec" => FileList[ '{lib,spec}/**', 'Rakefile' ] do |f|
+  # Read spec file and split out manifest section
+  spec = File.read(f.name)
+  parts = spec.split("  # = MANIFEST =\n")
+  fail 'bad spec' if parts.length != 3
+  # Determine file list from git ls-files
+  files = `git ls-files`.
+    split("\n").
+    sort.
+    reject{ |file| file =~ /^\./ }.
+    reject { |file| file =~ /^doc/ }.
+    map{ |file| "    #{file}" }.
+    join("\n")
+  # Piece file back together and write
+  parts[1] = "  s.files = %w[\n#{files}\n  ]\n"
+  spec = parts.join("  # = MANIFEST =\n")
+  File.open(f.name, 'w') { |io| io.write(spec) }
+  puts "Updated #{f.name}"
+end
+
+# Install the gem
+task :install do
+  `sudo gem uninstall #{GEM_NAME} -x`
+  `gem build #{GEM_NAME}.gemspec`
+  `sudo gem install #{GEM_NAME}*.gem`
+  `rm #{GEM_NAME}*.gem`
+end
+
+# rake spec
+desc "Run specs"
+Spec::Rake::SpecTask.new do |t|
+  t.spec_opts = ["--format", "specdoc", "--colour"]
+  t.spec_files = FileList["spec/**/*_spec.rb"]
+end

acts_as_archive.gemspec

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+Gem::Specification.new do |s|
+  s.name    = 'acts_as_archive'
+  s.version = '0.1.0'
+  s.date    = '2009-04-21'
+
+  s.summary     = "Moves your deleted records to a different table"
+  s.description = "Moves your deleted records to a different table"
+
+  s.author   = 'Winton Welsh'
+  s.email    = 'mail@wintoni.us'
+  s.homepage = 'http://github.com/winton/'
+
+  s.has_rdoc = false
+
+  # = MANIFEST =
+  # = MANIFEST =
+end

init.rb

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+require File.dirname(__FILE__) + "/rails/init"

lib/acts_as_archive.rb

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+require File.dirname(__FILE__) + "/acts_as_archive/activerecord/base/destroy"
+require File.dirname(__FILE__) + "/acts_as_archive/activerecord/base/find"
+require File.dirname(__FILE__) + "/acts_as_archive/activerecord/base/migrate"
+require File.dirname(__FILE__) + "/acts_as_archive/activerecord/migration"
+
+module ActsAsArchive
+  def self.included(base)
+    base.extend ActMethods
+  end
+
+  module ActMethods
+    def acts_as_archive
+      include ActiveRecord::Base::Destroy
+      include ActiveRecord::Base::Find
+      include ActiveRecord::Base::Migrate
+      self.create_archive_table unless $TESTING
+    end
+  end
+end

lib/acts_as_archive/activerecord/base/destroy.rb

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+module ActsAsArchive
+  module ActiveRecord
+    module Base
+      module Destroy
+
+        def self.included(base)
+          unless base.included_modules.include?(InstanceMethods)
+            base.class_eval do
+              alias_method :destroy_without_callbacks!, :destroy_without_callbacks
+              class <<self
+                alias_method :delete_all!, :delete_all
+              end
+            end
+            base.send :extend, ClassMethods
+            base.send :include, InstanceMethods
+          end
+        end
+
+        module ClassMethods
+          def copy_to_archive_sql(conditions)
+            %{
+              INSERT INTO archived_#{table_name} (#{column_names.join(', ')}, deleted_at)
+                SELECT #{column_names.join(', ')}, '#{Time.now.to_s(:db)}'
+                FROM #{table_name}
+                WHERE #{conditions}
+            }
+          end
+
+          def delete_all(conditions = nil)
+            sql = copy_to_archive_sql(conditions)
+            connection.execute(sql)
+          end
+        end
+
+        module InstanceMethods
+          def destroy_without_callbacks
+            unless new_record?
+              sql = copy_to_archive_sql("#{self.class.primary_key} = #{id}")
+              connection.execute(sql)
+            end
+            freeze
+          end
+
+          def destroy!
+            transaction { destroy_with_callbacks! }
+          end
+
+          def destroy_with_callbacks!
+            return false if callback(:before_destroy) == false
+            result = destroy_without_callbacks!
+            callback(:after_destroy)
+            result
+          end
+        end
+      end
+    end
+  end
+end

lib/acts_as_archive/activerecord/base/find.rb

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+module ActsAsArchive
+  module ActiveRecord
+    module Base
+      module Find
+
+        def self.included(base)
+          unless base.included_modules.include?(InstanceMethods)
+            base.send :extend, ClassMethods
+            base.send :include, InstanceMethods
+          end
+        end
+
+        module ClassMethods
+        end
+
+        module InstanceMethods
+        end
+      end
+    end
+  end
+end

lib/acts_as_archive/activerecord/base/migrate.rb

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+module ActsAsArchive
+  module ActiveRecord
+    module Base
+      module Migrate
+
+        def self.included(base)
+          unless base.included_modules.include?(InstanceMethods)
+            base.send :extend, ClassMethods
+            base.send :include, InstanceMethods
+          end
+        end
+
+        module ClassMethods
+          def create_archive_table
+            unless connection.table_exists?("archived_#{table_name}")
+              connection.execute("
+                CREATE TABLE archived_#{table_name}
+                  AS SELECT * from #{table_name}
+                  WHERE false;
+              ")
+            end
+            columns = connection.columns("archived_#{table_name}").collect(&:name)
+            unless columns.include?('deleted_at')
+              connection.add_column("archived_#{table_name}", 'deleted_at', :datetime)
+            end
+          end
+        end
+
+        module InstanceMethods
+        end
+      end
+    end
+  end
+end

lib/acts_as_archive/activerecord/migration.rb

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+module ActsAsArchive
+  module ActiveRecord
+    module Migration
+
+      def self.included(base)
+        unless base.included_modules.include?(InstanceMethods)
+          base.send :extend, ClassMethods
+          base.send :include, InstanceMethods
+        end
+      end
+
+      module ClassMethods
+      end
+
+      module InstanceMethods
+      end
+    end
+  end
+end

rails/init.rb

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+require File.expand_path(File.dirname(__FILE__) + "/../lib/acts_as_archive")
+ActiveRecord::Base.send(:include, ActsAsArchive)

spec/acts_as_archive/activerecord/base/destroy_spec.rb

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+require File.expand_path(File.dirname(__FILE__) + "/../../../spec_helper")
+
+describe ActsAsArchive::ActiveRecord::Base::Destroy do
+
+  before(:each) do
+    establish_test_db
+  end
+
+  it "" do
+  end
+end

spec/acts_as_archive/activerecord/base/find_spec.rb

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+require File.expand_path(File.dirname(__FILE__) + "/../../../spec_helper")
+
+describe ActsAsArchive::ActiveRecord::Base::Destroy do
+
+  before(:each) do
+    establish_test_db
+  end
+
+  it "" do
+  end
+end

spec/acts_as_archive/activerecord/base/migrate_spec.rb

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+require File.expand_path(File.dirname(__FILE__) + "/../../../spec_helper")
+
+describe ActsAsArchive::ActiveRecord::Base::Migrate do
+
+  before(:all) do
+    establish_test_db
+    @connection = Article.connection
+  end
+
+  describe 'create_archive_table' do
+
+    before(:all) do
+      Article.create_archive_table
+      @article_columns = @connection.columns("articles").collect(&:name)
+      @archive_columns = @connection.columns("archived_articles").collect(&:name)
+    end
+
+    it "should create an archive table" do
+      @connection.table_exists?("archived_articles").should == true
+    end
+
+    it "should create an archive table with the same structure as the original table" do
+      @article_columns.each do |col|
+        @archive_columns.include?(col).should == true
+      end
+    end
+
+    it "should add a deleted_at column to the archive table" do
+      (@archive_columns - @article_columns).should == [ 'deleted_at' ]
+    end
+  end
+end

spec/fixtures/article.rb

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+class Article < ActiveRecord::Base
+  acts_as_archive
+end

spec/fixtures/database.yml.example

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+test:
+  adapter: mysql
+  database: acts_as_archive
+  username: root
+  password: 
+  host: localhost

spec/spec.opts

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+--color