Ruby rescue all exceptions except MyException

Question

In Ruby, is it possible to rescue all exceptions except for a specified one?

Ken Bloom · Answer 1 · 2011-01-25T22:23:12.840

54

begin

rescue MyException
  raise #to reraise the same exception without changing it
rescue Exception => e
  #do something with e
end

edited Jan 25 '11 at 22:23

answered Jan 25 '11 at 17:11

Ken Bloom

score 12 · Accepted Answer · answered Jan 25 '11 at 17:08

12

Not as such no. But you can rescue all exceptions and reraise the exception if it is a MyException.

answered Jan 25 '11 at 17:08

sepp2k

You're not supposed to rescue all exceptions: https://stackoverflow.com/questions/10048173/why-is-it-a-bad-style-to-rescue-exception-e-in-ruby – Will Sheppard Jun 13 '17 at 10:14
1

@WillSheppard I would argue that this depends entirely on what your code is doing. – Orlando May 31 '21 at 20:16

score 2 · Answer 3 · answered Jan 26 '11 at 22:21

Without knowing more about your problem, I'd suggest Ken Bloom's answer.

However, I'd like to know more about why you're doing it.

Are you worried about a really severe exception, and not wanting to rescue that one, but allow less severe exceptions to be rescued?

In that case, I'd make my custom exception inherit from Exception rather than StandardError and then have

begin
  do_risky_stuff
rescue # Not rescue Exception
  handle_less_serious_stuff
end

3 Answers3