Where does one find Rails deprecation warnings?

Question

How can I know that I'm seeing all deprecation warnings?

Will they all print out at boot time? So firing up the console and viewing the output should be sufficient?

(if so, I don't have any. w00t!)

Thanks, John

Answer 1

Will they all print out at boot time? So firing up the console and viewing the output should be sufficient?

No; you wouldn't see some kinds of deprecation warnings until runtime. For instance, if you try to use find_all instead of find(:all), Ruby doesn't know you're using find_all until you actually hit that line.

Ruby is a dynamic language, so it would be very hard to prove that all deprecated code is actually gone; bindings to the "bad" code can be deferred and thus there's no way to guarantee that it's called in the first place. Your best bet is a static-analysis tool that reads your code in the abstract and errs on the side of false positives.