I went through whole example in lesson and I run into one problem. ShoutsController#create validations for body are not run, which leads into weird state when Shout is saved, but TextShout is not. What is proper way of propagating validations from association in Rails? Do I have to write custom validation method?
Thanks for help.
UPDATE: As most of the times, answer was quite simple I just had to read Rails docs more carefully. 