rails/rails — pull request #18145 by georgemillo (2014-12-22 16:48:33+00:00)
Title: Add information about "allow_destroy" requiring an ID. [ci skip]

I just wasted an absurd amount of time trying to figure out why my model wasn't being deleted even though I was setting `_destroy` to true like the instructions said. Making the documentation a little bit clearer so that someone like me doesn't waste their time in future.