edit record with ember data

I wanted to make a edit record.but I can not change my value has.

/models/activite.js
import DS from 'ember-data';

export default DS.Model.extend({
 nomActivite : DS.attr(),
 nb : DS.attr(), 
});

my function

edit(){
  var controller=this.get('controller');
  console.log(this.store.query('activite',{id:"-KFBBfggYauCl3sGL4oV"}));
  this.store.query('activite',{nomActivite:controller.get('nomAct')}).then(function (record) {
      record.set('nb',controller.get('nb'));
      record.save();
      console.log(record.get('nb'));
  });