Fixes #8238 : Mark content_type parameter as required, since it is for POSTS
fixes #8355 - remove ambigious column plucks for older rails
Merge pull request #4810 from stbenjam/8355

fixes #8355 - remove ambigious column plucks for older rails
Merge pull request #4792 from bkearney/bkearney/8238

Fixes #8238 : Mark content_type parameter as required, since it is for P...