rails/rails — pull request #9668 by neerajdotname (2013-03-11 19:56:30+00:00)
Title: Show warning message if delete_all is firing callbacks

`post.comments.delete_all` will fire callbacks if :dependent option is
:destroy . It will be fixed in Rails 4.1 . In the meantime display
a warning . Look at #9567 for details .