passing parameters in find of dynamic model

I want to pass two (or more) arguments to this.store.find() ; I have app.router.js like

Router.map(function() 
{ 
      this.route('posts'); 
      this.route('post', { path: '/post/:post_id' }); 
});

and

dynamic route's model

model(params) 
{ 
 return this.store.findRecord('photo', params.photo_id); 
}

this will go to /photo/photo_id

now I tried to pass couple of arguments then it was giving error: no model is defined for some_photo_it (say id) I tried this: model(params) { return this.store.findRecord('photo', params.photo_id,{param1:0, param2:25}); }

please answer.