Created by: gracewashere
Why?
Administrate relied on #to_s to display objects throughout the system,
but in order for it to work correctly developers needed to define #to_s
on each model that they wanted to use with Administrate.
No more.
Now, if a developer doesn't define a custom #to_s on a model, Administrate will detect that and default to showing the object's class and database id.