In my last post I introduced Catalyst::Controller::Accessors, which is mostly aimed at users who do a lot of chaining. This module is similarly targeted for chaining users. Anyone who has used chaining for more than a few weeks will know that exceptions in chains are stupid; an exception will not stop the chain, but merely end the current part of the chain, add to $c->errors, and run the next part of the chain. I would understand this if it were something that you could choose to turn on in a per-chain basis or something, but as a default it’s horrible.

This module solves that problem. It just detaches the chain and sets $c->errors when an exception is thrown. To use it you just need to do the following in your controllers (base controller anyone?):

1
2
3
4
5
6
7
8
9
10
package MyApp::Controller::Foo;
use Moose;

BEGIN { extends 'Catalyst::Controller::ActionRole' }

__PACKAGE__->config(
   action_roles => ['DetachOnDie'],
);

...;

If for some reason you can’t use the excellent Catalyst::Controller::ActionRole you can use the ActionClass version as follows:

1
2
3
4
5
6
7
8
9
10
11
12
package MyApp::Controller::Foo;
use Moose;

BEGIN { extends 'Catalyst::Controller' }

__PACKAGE__->config(
   action => {
      '*' => { ActionClass => 'DetachOnDie' },
   },
);

...;