[Catalyst] Newbie needs help with tutorial

[Alejandro Imass]

The error says near the require. He may be missing a simple ; or he
may not even have DBIx::Class


On 11/3/06, John Napiorkowski <jjn1056 at yahoo.com> wrote:
> --- catalyst.20.chsg at spamgourmet.com wrote:
>
> > I'm also returning to Perl programming after
> > (joyfully) finding an
> > MVC that's based on a language I've already learned.
> >
> > However, in going through the tutorial, I know I've
> > screwed up
> > something, somewhere.  When I try to run the server,
> > here's what I get:
> >
> > $ script/myapp_server.pl
> > Couldn't instantiate component
> > "MyApp::Model::MyAppDB", "Cannot load
> > schema class 'MyAppDB': syntax error at (eval 99)
> > line 1, near
> > "require DBIx::Class:"
> >          ...propagated at
> > /opt/local/lib/perl5/5.8.8/base.pm line 85.
> > BEGIN failed--compilation aborted at
> > /Volumes/SHARED/Projects/
> > Learning/Catalyst/MyApp/script/../lib/MyAppDB.pm
> > line 10.
> > Compilation failed in require at
> > /opt/local/lib/perl5/site_perl/5.8.8/
> > Catalyst/Model/DBIC/Schema.pm line 272.
> > at script/myapp_server.pl line 53" at
> > script/myapp_server.pl line 53
> > Compilation failed in require at
> > script/myapp_server.pl line 53.
> >
> >
> > The part that confuses me is "syntax error at (eval
> > 99) line 1".
> > What's "(eval 99)" mean?  And if anyone has a clue
> > on what's wrong
> > (or even just what files to look at and for what),
> > I'd be grateful.
>
> You'll find that a lot of dispatched methods in
> Catalyst are wrapped in an eval so that it can catch
> errors for you.  'eval 99' is referring to spot in the
> evaled code.
>
> I've found that it can be a bit hard to debug what's
> going wrong when the DBIx schema classes have errors.
> Try checking that all the required modules are loaded
> and so forth.  Use 'perl -c ...' to to a sanity check
> on the syntax.  Try paring down the components you are
> loading to see if you can ID the missing or troubled
> part.
>
> Start with the DBIx schemas you created, looks like
> that is the core of the issue.
>
> --john
>
> >
> > Thanks,
> >
> > Conan.
> >
> >
> >
> > On Nov 1, 2006, at 3:36 PM, JT Justman -
> > jt at signless.com wrote:
> >
> > > Richard Wolfe wrote:
> > >> Hello all-
> > >>
> > >> I've been writing (bad) Perl/CGI scripts for
> > years, but am just now
> > >> trying to get my head around Catalyst (and MVC in
> > general). I
> > >> managed to
> > >> get Catalyst installed on my little Linux box
> > here, and I'm busily
> > >> working my way through
> > Catalyst::Manual::Tutorial.
> > >>
> > >> In working my way through Part 2 (Catalyst
> > Basics) of the tutorial, I
> > >> create my new Catalyst project and start up the
> > server and can
> > >> browse to
> > >> it no problem. But after I step through all the
> > other tasks on this
> > >> portion of the tutorial (create a database,
> > MyAppDB.pm, the "result
> > >> source" files, the controller, etc.) the server
> > throws an error
> > >> when I
> > >> try to start it:
> > >>
> > >> [rwolfe at coyote MyApp]$ script/myapp_server.pl
> > >> Couldn't instantiate component
> > "MyApp::Model::MyAppDB", "Cannot load
> > >> schema class 'MyAppDB': Recursive inheritance
> > detected while
> > >> looking for
> > >> method 'can' in package
> > 'DBIx::Class::Componentised' at
> > >>
> >
> /usr/lib/perl5/site_perl/5.8.8/DBIx/Class/Componentised.pm
> > line 76.
> > >> Compilation failed in require at
> > >>
> >
> /usr/lib/perl5/site_perl/5.8.8/Catalyst/Model/DBIC/Schema.pm
> > line
> > >> 272.
> > >>  at script/myapp_server.pl line 53" at
> > script/myapp_server.pl line 53
> > >> Compilation failed in require at
> > script/myapp_server.pl line 53.
> > >>
> > >
> > > Well, it sort of looks to my untrained eye like
> > some component of your
> > > schema is loading either the main Schema class or
> > something else.
> > >
> > > In your MyAppDB.pm file, what do you have in
> > load_classes? If it's
> > > blank, IIRC it will automatically load all the
> > modules in the MyAppDB
> > > directory. Perhaps you have something in there you
> > didn't mean to
> > > have,
> > > such as a copy of MyAppDB.pm? Look carefully at
> > each of those classes,
> > > and try disabling them one at a time.
> > >
> > > It may help to check out a copy of the finished
> > app from svn to have
> > > something to compare to.
> > >
> > > JT
> > >
> > > _______________________________________________
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> >
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>
>
>
>
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