```ruby
require 'request_store'
require 'douglas/version'
require 'douglas/model'

module Douglas
  class << self
    def the_stamper
      RequestStore.store[:the_stamper]
    end

    def the_stamper= user
      RequestStore.store[:the_stamper] = user
    end

    def with_stamper user
      return unless block_given?

      self.the_stamper = user
      yield
      self.the_stamper = nil
    end
  end
end

if defined?(::Rails) && ActiveRecord::VERSION::STRING >= '3.2'
  require 'douglas/frameworks/rails'
end
```

Extend ActiveRecord::Base with Douglas::Model after active_record is loaded
user
```ruby
require 'request_store'
require 'douglas/version'
require 'douglas/model'

module Douglas
  class << self
    def the_stamper
      RequestStore.store[:the_stamper]
    end

    def the_stamper= user
      RequestStore.store[:the_stamper] = user
    end

    def with_stamper user
      return unless block_given?

      self.the_stamper = user
      yield
      self.the_stamper = nil
    end
  end
end

if defined?(::Rails) && ActiveRecord::VERSION::STRING >= '3.2'
  require 'douglas/frameworks/rails'
end

ActiveSupport.on_load(:active_record) do
  ActiveRecord::Base.send :extend, Douglas::Model
end
```
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