Comments on: Debugging Catalyst http://blog.laufeyjarson.com/2009/05/debugging-catalyst/ ... notes, thoughts, rants, and randomness. Fri, 05 Mar 2010 20:49:33 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Matt S Trout http://blog.laufeyjarson.com/2009/05/debugging-catalyst/comment-page-1/#comment-5 Matt S Trout Sun, 10 May 2009 14:42:54 +0000 http://blog.laufeyjarson.com/?p=20#comment-5 Of course I then managed to forget the other really useful trick - either use CatalystX::REPL to break on exceptions or (my usual approach, which I often use to debug DBIC schemas and similar) - require Devel::REPL; $Devel::REPL::DefaultScratchPad::ctx = $self; Devel::REPL->new->run; and presto, you get a repl prompt with a $ctx in scope that you can poke at. Of course I then managed to forget the other really useful trick – either use CatalystX::REPL to break on exceptions or (my usual approach, which I often use to debug DBIC schemas and similar) -

require Devel::REPL;
$Devel::REPL::DefaultScratchPad::ctx = $self;
Devel::REPL->new->run;

and presto, you get a repl prompt with a $ctx in scope that you can poke at.

]]> By: Matt S Trout http://blog.laufeyjarson.com/2009/05/debugging-catalyst/comment-page-1/#comment-4 Matt S Trout Sun, 10 May 2009 14:32:13 +0000 http://blog.laufeyjarson.com/?p=20#comment-4 This is a great technique and one I use all the time - one note though, "print STDERR" isn't nearly as fun as 'warn', and potentially Carp's louder versions with stack traces will be even easier. The other thing to remember is that Catalyst plugins are mixed in to the application class itself, so your $self within a plugin is actually the per-request $c. I'd love to see a write up of these techniques on the wiki if you're feeling wonderful and generous ... :) This is a great technique and one I use all the time – one note though, “print STDERR” isn’t nearly as fun as ‘warn’, and potentially Carp’s louder versions with stack traces will be even easier.

The other thing to remember is that Catalyst plugins are mixed in to the application class itself, so your $self within a plugin is actually the per-request $c.

I’d love to see a write up of these techniques on the wiki if you’re feeling wonderful and generous … :)

]]>