fireproofsocks
Raising a custom exception: module not available?
I can’t seem to make custom exceptions work. If I define a module like this:
defmodule MyApp.CustomException do
defexception message: "Something bad happened."
end
then somewhere else in my app I reference it:
defmodule Something do
alias MyApp.CustomException
def do_something(nil) do
raise CustomException
end
end
I get this error:
function MyApp.CustomException.exception/1 is undefined (module MyApp.CustomException is not available)
What am I missing? I thought I was following https://elixir-lang.org/getting-started/try-catch-and-rescue.html correctly…
Marked As Solved
fireproofsocks
FOUND IT. I accidentally put my module outside of lib/. Whoops.
2
Also Liked
blatyo
Conduit Core Team
When I get this it’s usually a spelling issue for the module name.
1
NobbZ
Your example works for me:
Erlang/OTP 21 [erts-10.3.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]
Interactive Elixir (1.8.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> defmodule MyApp.CustomException do
...(1)> defexception message: "Something bad happened."
...(1)> end
iex(2)> defmodule Something do
...(2)> alias MyApp.CustomException
...(2)>
...(2)> def do_something(nil) do
...(2)> raise CustomException
...(2)> end
...(2)> end
iex(3)> Something.do_something(nil)
** (MyApp.CustomException) Something bad happened.
iex:6: Something.do_something/1
1
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