[Catalyst] How and where to run a method at Catalyst start up?

[Emmanuel Quevillon]

Rodrigo wrote:
> 
> 
>            #Create appropriate model
>            my $model = join("::", "GenoList", "$db", "Organism");
>            my $r = BiblioList->model($model)->search()->first();
>            $ROrgs->{$db} = $r;
>        }
> 
> 
> Emmanuel, make sure that GenoList::$db::Organism actually resolves to a
> correct model name for you application. I have a feeling that it doesn't.
> 

Hi Rodrigo,

Thanks for your quick reply.

Actually yes, GenoList::$db::Organism resolves to a correct model.
I use that sort of call into some of my controller sub using the
same syntax $c->model("GenoList::$db::<Table>").

in BUILD body :

<snip> ...

    foreach my $db (sort keys
%{BiblioList->config()->{remote_supported_dbs}}){

        #Create appropriate model
        my $model = join("::", "GenoList", "$db", "Organism");
        print STDERR "Model: $model\n";
        my $r = BiblioList->model($model)->search()->first();
        $ROrgs->{$db} = $r;
    }

<snip>

the output is :

Model: GenoList::bovisR1db::Organism

Just before the error message


> Make sure you understand the way DB models are invoked in Catalyst.
> Typically:
> 
> $c->model('MyModelName::MyResultClassName');
> 
> Where:
> - ModelName is a module called lib/MyApp/Model/MyModelName.pm
> - ResultClassName (usually points to a db table)  is a module called
> lib/MyApp/Schema/Result/ResultClassName.pm
> 
> The paths may vary sensibly depending on how you created them and if
> it's a DBIC schema or something else, but hopefully you get the idea.
> 
> There's good reading material on this here:
> http://search.cpan.org/~hkclark/Catalyst-Manual-5.7021/lib/Catalyst/Manual/Tutorial/MoreCatalystBasics.pod#Create_Static_DBIx::Class_Schema_Files
> 

I created my module using the schema loader from DBIC package.

> 
>     Couldn't instantiate component "BiblioList::Model::Mapping", "Can't
>     call method "search" on an undefined value at
>     /home/tuco/src/perl/projects/Catalyst/BiblioList/dev/bibliolist-0.08/script/../lib/BiblioList/Model/Mapping.pm
>     line 28." at script/bibliolist_server.pl line 66
>     Compilation failed in require at script/bibliolist_server.pl line 66.
> 
>  
> The method  ->search() is being called "on an undefined value" probably
> because Catalyst could not find a model for the parameter you passed to
> BiblioList->model('...').
> 
> 
>     If I use $self instead of BiblioList the error change:
> 
>     Couldn't instantiate component "BiblioList::Model::Mapping", "Can't
>     locate object method "model" via package
>     "BiblioList::Model::Mapping" at
>     /home/tuco/src/perl/projects/Catalyst/BiblioList/dev/bibliolist-0.08/script/../lib/BiblioList/Model/Mapping.pm
>     line 28." at script/bibliolist_server.pl line 66
>     Compilation failed in require at script/bibliolist_server.pl line 66.
> 
> 
> Don't use $self. The model method hangs from your application object,
> which is $c not $self.
> 
> $self points to an instance of you BiblioList::Model::Mapping, which is
> a child of Catalyst::Model, which does not give you a ->model() method.
>  

The strange thing is that if I copy the body of BUILD to
BiblioList.pm (just after __PACKAGE__->setup())
The function works just fine and I don't get any error.

So my question is, would it be a problem with my BiblioList/Model
directory stucture which is:

$  ls -l lib/BiblioList/Model/*
 lib/BiblioList/Model/BiblioListDB.pm*
 lib/BiblioList/Model/File.pm
 lib/BiblioList/Model/Mapping.pm

lib/BiblioList/Model/GenoList:
total 40
-rw-r--r-- 1 tuco tuco 723 Apr  6 09:57 aureusdb2.pm
-rw-r--r-- 1 tuco tuco 728 Apr  6 09:57 bordetelladb2.pm
-rw-r--r-- 1 tuco tuco 723 Apr  6 09:57 bovisR1db.pm
-rw-r--r-- 1 tuco tuco 722 Apr  6 09:57 colibridb2.pm
-rw-r--r-- 1 tuco tuco 720 Apr  6 09:57 lepraedb2.pm
-rw-r--r-- 1 tuco tuco 722 Apr  6 09:57 spneumodb2.pm
-rw-r--r-- 1 tuco tuco 732 Apr  6 09:57 tsmegmatisR2db.pm
-rw-r--r-- 1 tuco tuco 734 Apr  6 09:57 ttuberculisR8db.pm
-rw-r--r-- 1 tuco tuco 733 Apr  6 09:57 tuberculisR8db.pm
-rw-r--r-- 1 tuco tuco 729 Apr  6 09:57 ulceransR1db.pm

And each of these model are configured as :
__PACKAGE__->config(
	'schema_class' => 'GenoList',
	'connect_info' => [...]
);

NOTE: I don't have a module called lib/BiblioList/Model/GenoList.pm
But I don't think this causes the problems? Isn't it?


and where my DBIC class build with the loader are located under
lib/GenoList :

$ ls -l lib/GenoList
total 28
-rwxr-xr-x 1 tuco tuco 1514 Apr  6 09:57 Author.pm*
-rwxr-xr-x 1 tuco tuco 1955 Apr  6 09:57 Bibliography.pm*
-rwxr-xr-x 1 tuco tuco  974 Apr  6 09:57 BufBiblAuth.pm*
-rwxr-xr-x 1 tuco tuco 1127 Apr  6 09:57 BufBiblGene.pm*
-rwxr-xr-x 1 tuco tuco 5409 Apr  6 09:57 Genes.pm*
-rwxr-xr-x 1 tuco tuco  899 May 15 14:25 Organism.pm*


I must confess I am a bit lost :(
Thanks for any advice/help

Best regards

Emmanuel

> -rodrigo
> 
> 
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-- 
-------------------------
Emmanuel Quevillon
Biological Software and Databases Group
Institut Pasteur
+33 1 44 38 95 98
tuco at_ pasteur dot fr
-------------------------