DeepDirty

ActiveModel::Dirty does not track changes that are destructive or inplace:

user = User.first
user.name.upcase!
u.changed?          # => false

DeepDirty fixes this by adding a before_validation hook that compares all attributes to their before_type_cast values and records any changes.

Add this line to your application's Gemfile:

gem 'deep_dirty'

And then execute:

$ bundle

Or install it yourself as:

$ gem install deep_dirty

In an ActiveModel include this module:

class User < ActiveRecord::Base
    include DeepDirty
end

user = User.first
user.name.upcase!
user.valid?
user.changed?       # => true
user.changes        # => {"name" => ["Test User", "TEST USER"]}

Alternatively if you need to check changes without calling validation, use deep_changed?:

user = User.first
user.name.upcase!
user.changed?       # => false
user.deep_changed?  # => true
user.changed?       # => true
user.changes        # => {"name" => ["Test User", "TEST USER"]}

1. Fork it ( https://github.com/borgand/deep_dirty/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request