Paperclip supports custom interpolations in images' paths. In order to
ease transition into CarrierWave, support the same functionality with the
`Paperclip::Compatibility` module.
The public api is similar to Paperclip's
```ruby
class CustomUploader < CarrierWave::Uploader::Base
include CarrierWave::Compatibility::Paperclip
interpolate :some_method do |custom, style|
custom.model.some_method
end
end
```
This is accomplished by appending the desired functionality into
`CarrierWave::Compatibility::Paperclip#mappings`
Mehdi Lahmam