Fix: Unlike ActiveRecord, DataMapper doesn't raise record-not-found errors

[rykov]

This fix is to ensure that DataMapper adapter behavior matches ActiveRecord when a record is not found. This allows to consistently handle missing records using rescue_from, rather than checking the resource variable for nil.

[Ragmaanir]

I need this too. I would really like to see this integrated.

[xhoy]

Thanks for your submission! The ryanb/cancan repository has been inactive since Sep 06, 2013. Since only Ryan himself has commit permissions, the CanCan project is on a standstill.

CanCan has many open issues, including missing support for Rails 4. To keep CanCan alive, an active fork exists at cancancommunity/cancancan. The new gem is cancancan. More info is available at #994.

If your pull request or issue is still applicable, it would be really appreciated if you resubmit it to CanCanCan.

We hope to see you on the other side!