/**
  * model实例
  */
 public function actionModel()
 {
     $example = new Example();
     $example->showMessage();
     //获取所有记录
     $all = Example::all();
     foreach ($all as $item) {
         echo '<p>' . $item->name . '</p>';
     }
     echo '<br></br>';
     //获取一条记录
     $one = Example::find(1);
     echo '<p>' . $one->name . '</p>';
     echo '<br></br>';
     //条件查询
     $condition = array('name = ?', 'yang');
     $where = Example::find('all', array('conditions' => $condition));
     foreach ($where as $item) {
         echo '<p>' . $item->name . '</p>';
     }
     echo '<br></br>';
 }