Spawn should be usable anywhere

[hiper]

Currently spawn only works for Models, Controllers and Observers.

But let's say I want to use spawn within a paperclip processor, well it won't work.

[Tom Anderson]

I have plans to fix this... I'm just slow about doing it. :-)

[Michael Noack]

Closing to clean up as this in an old issue, if this is still valid on the latest version of spawnling then please re-open the issue and I will address it.