```ruby
#Tells the server where to find ImageMagick
#Paperclip.options[:command_path] = "/usr/local/bin/"
Paperclip.options[:swallow_stderr] = false

#Load custom Paperclip interpolation
Paperclip.interpolates :account do |attachment, style|
  attachment.instance.account.name
end```

Make sure design interpolation works.
user
```ruby
#Tells the server where to find ImageMagick
#Paperclip.options[:command_path] = "/usr/local/bin/"
Paperclip.options[:swallow_stderr] = false

#Load custom Paperclip interpolation
Paperclip.interpolates :account do |attachment, style|
  attachment.instance.account.name
end

Paperclip.interpolates :design do |attachment, style|
  attachment.instance.design.id
end
```
assistant