test

// Pets
module.exports = {
    attributes:{
        type: {
            type: 'string'
        }
    }
};

//PetsController

find: function(req,res,next){
    var type = req.param('type');
    if(type){
        Pets.find({type: type}).exec(function(e,p){
            return res.json(p);
        });
    }
    else {
        //...
    }
}

//route
'get /pets/:type?': {
    controller: 'PetsController',
        action: 'find'
}