I have an existing application (my website) that I'm doing some code tidying in, and the tidy up is following the same sort of idea as the Mojo::Pg example here, with separate model and controller files to keep things defined. My site accesses both Flickr and Last.fm's APIs, and I have a helper defined in Site::Helpers:
$app->helper(
get_base_rest_url => sub {
my ( $self, $config ) = @_;
sswitch ( $config ) {
case 'photos': {
my $base_url = 'https://api.flickr.com/services/rest/';
my $user_id = '7281432@N05';
my $api_key = $self->app->config->{ 'api_token' }{ 'flickr' };
my $url =
"$base_url"
. "?user_id=$user_id"
. "&api_key=$api_key"
. "&per_page=" . $self->session->{ per_page }
. '&format=json'
. '&nojsoncallback=1';
return $url;
}
case 'music': {
my $base_url = 'https://ws.audioscrobbler.com/2.0/';
my $username = 'virtualwolf';
my $api_key = $self->app->config->{ 'api_token' }{ 'last_fm' };
my $per_page = $self->session->{ 'per_page' };
my $url = "$base_url?user=$username&limit=$per_page&api_key=$api_key&format=json";
return $url;
}
}
}
);
The problem I'm running into is that I don't know how to access that helper from the Site::Model::Photos module. The error is
Can't locate object method "get_base_rest_url" via package "Site::Model::Photos"
which is fair enough, but I can't work out how to actually get at that get_base_rest_url helper (or alternatively, how to access the api_token config).
The problem is that your module have not got app attribute/method which get access to your app.
So, when you create instance of Site::Model::Photos you need to pass app to it in param and make it weaken something like that:
package Site::Model::Photos
use Scalar::Util 'weaken';
sub new {
my $class = shift;
my $app = shift;
my $hash = {app => $app, ...};
weaken $hash->{app};
return bless $hash, $class;
}
sub your_method {
my $self = shift;
$self->{app}->get_base_rest_url(...);
}
1;
Or you may to use this module https://metacpan.org/release/Mojolicious-Plugin-Model which do it for you:
package Site::Model::Photos
use Mojo::Base 'MojoX::Model';
... code of your module ...
sub your_method {
my $self = shift;
$self->app->get_base_rest_url(...);
}
1;
And in your App.pm need to add this:
$app->plugin('Model', {namespaces => ['Site::Model']});
And use it that in controller:
$c->model('photos');
$c->app->model('photos');
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