CODEWITHSUNDEEP
rubyexception
Teofrostus
Teofrostus

Reputation: 1636

What is the Rubyist way to catch an exception raised in a rescue block?

Suppose I have the following:

begin
  raise 'Exception!'
rescue => e
  puts "Rescued exception: #{e.message}"
  raise 'Something I did in this block raised an exception!'
end

What's the Rubyist way to catch the second exception? Is it best to wrap the entire thing in another begin-rescue block, or is there a more elegant solution?

Upvotes: 2

Views: 760

Answers (1)

Mori
Mori

Reputation: 27799

I can't speak to the Rubyist way, but here's a Rubyist's way:

Make the rescue code as error proof as possible. If it isn't possible to make it so error proof that exceptions are vanishingly rare, then rather than beginning a nest of rescue blocks inside of rescue blocks, call another method that handles its own exceptions, e.g.:

def foo
  1/0
rescue
  complicated_foo_error_handler
end

private

def complicated_foo_error_handler
  # handle foo errors
rescue
  complicated_complicated_foo_error_handler_error_handler
end

def complicated_complicated_foo_error_handler_error_handler
  # handle complicated_foo_error_handler errors
rescue
  STDERR.puts 'I give up!'
  exit false
end

Upvotes: 4

Related Questions