tl;dr => Rough diff of the AutoAudit module/mixin/dsl. WHO: Joshua "Unix Superhero" Toyota WHAT: Sometimes you want to keep track of any changes to a database table. This lets you say, "User model, anytime (any column changes || columns x, y, or z change) save the Before/After values with the time they changed. (If we are lucky, we can find out …

autoaudit.rb.diff

commit 9d4f4c2b3bd0207bf9a02a4403b3f54cb5bf3ae4
Author: Joshua Toyota <jearsh@gmail.com>
Date:   Wed Dec 19 11:29:58 2012 -0500

    autoaudit, with user as an example

diff --git a/app/models/user.rb b/app/models/user.rb
index 0077df0..f29e5d8 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,7 +1,8 @@
-
 class User < ActiveRecord::Base
   # ...
   # ...
+  include AutoAudit
+  audit columns: ['first_name','last_name']
   # ...
   # ...
 
diff --git a/lib/auto_audit.rb b/lib/auto_audit.rb
new file mode 100644
index 0000000..9f3aa9e
--- /dev/null
+++ b/lib/auto_audit.rb
@@ -0,0 +1,48 @@
+module AutoAudit
+
+  def self.included(base)
+    base.cattr_accessor :audit_columns, :audit_table, :audit_polymorphic
+    base.extend DSL
+  end
+
+  def apply_audit
+    changes.map{|col,vals|
+      if audit_columns.include?(col)
+        send(audit_table).create(col_name: col, before: vals.first, after: vals.last)
+      end
+    }
+  end
+
+  module DSL
+    attr_accessor :audit_columns, :audit_table, :audit_polymorphic
+    def audit(opts)
+      options = {
+          polymorphic: false,
+          table: [table_name.singularize, 'changes'].join('_'),
+          columns: []
+        }.merge(opts)
+
+      self.audit_columns = options[:columns].map(&:to_s)
+      self.audit_table = options[:table]
+      self.audit_polymorphic = options[:polymorphic]
+
+      before_update :apply_audit
+      has_many options[:table].to_sym
+    end
+
+    def audit_all(opts)
+      options = {
+          polymorphic: false,
+          table: [table_name, 'changes'].join('_'),
+          columns: []
+        }.merge(opts)
+
+      self.audit_columns = column_names
+      self.audit_table = options[:table]
+      self.audit_polymorphic = options[:polymorphic]
+
+      before_update :apply_audit
+      has_many options[:table].to_sym
+    end
+  end
+end
diff --git a/spec/lib/auto_audit_spec.rb b/spec/lib/auto_audit_spec.rb
new file mode 100644
index 0000000..a7fcb39
--- /dev/null
+++ b/spec/lib/auto_audit_spec.rb
@@ -0,0 +1,5 @@
+
+## I can stub out everything for the 2 models and still accurately gauge whether it is working or not.  At least I thought this at some point.
+## 
+## 
+

Damn you github. This is my gist.

And wtf with the description. SUPER DOUBLE ULTRA FAIL.