[Catalyst] DBIC register_source causing wierd Cat error?

[Caroline Johnston]

OK, so I think I've worked out the cause:
in the class_mappings:
                                       
'ROME::Model::ROMEDB::FactorExperiment' => 'FactorExperiment',
'ROME::Model::ROMEDB::Factor' => 'Factor',
'ROME::Model::ROMEDB::FactorByUser' => 'FactorByUser',

BUT

'ROMEDB::Factor' => 'FactorByUser',

If I do:

$c->model->result_source->schema->class_mappings->{'ROMEDB::Factor'} = 
'Factor';
$c->model->result_source->schema->class_mappings->{'ROMEDB::FactorByUser'} 
= 'FactorByUser';

Then everything works as expected. Is there a non-hacky way to tell 
Catalyst to set up the class_mappings like this?

thanks!

Cxx