BikeShed-1/app/components/bikes/javascripts/init_component.js

{
  initComponent: function(){
    // calling superclass's initComponent
    this.callParent();

    // setting the 'rowclick' event
    var view = this.getView();
    view.on('itemclick', function(view, record){
      // The beauty of using Ext.Direct: calling 3 endpoints in a row, which results in a single call to the server!
      this.selectBikeBrand({bike_brand_id: record.get('bike_brand__brand')});
    }, this);
  }
}