portion_control

https://github.com/djspinmonkey/portion_control

A gem to allow a RESTful API to provide a given resource at various levels of completeness, or "weight." Portion Control uses MIME types to specify whether a "lightweight", normal, or "complete" representation is desired. The intent is that a lightweight representation should not make any calls to other services or include large amounts of data, a normal representation has no particular limitations, and a complete representation should include all available data on a resource.