在函数 cakephp 2 中传递值

Question

我有计算教师平均率的函数，我将平均值保存在变量 $result 上，我想将变量传递给 get_teacher_average_rating 并打印平均值，但我尝试这样做我有错误

注意（8）：未定义变量：结果 [APP/Controller/RatingSchoolsController.php，第 30 行] 警告 (2)： 无法修改标头信息 - 标头已由（输出 开始于 /Applications/MAMP/htdocs/classera-core-code/lib/Cake/Utility/Debugger.php:795） [APP/Controller/AppController.php，第 67 行]

如何解决这个问题并在get_teacher_average_rating 中打印平均值

public function set_teacher_average_rating($result)
    {
        $this->autoRender = false;
        if($this->request->is('get'))
        {
            $author_id = $this->request->query('author_id');//
            $rate = $this->Rating->find('all',array('conditions'=>array('author_id'=> $author_id), 'fields'=> array('AVG(Rating.value) as averageRating'), 'recursive' =>-1));

            $average = $rate[0][0]['averageRating'];
            $result = array('success'=>'1' , 'average' => $average );
        }
        else{
            $result = array('success'=>'0','message'=>'request type is not GET');
        }
        echo json_encode($result);
    }


public function get_teacher_average_rating()
    {
        $this->autoRender = false;
                $average = $this->set_teacher_average_rating($result);
                $rate = $this->Rating->find('all',array('conditions'=>array('author_id'=> $author_id)));

                     //get rate teacher
                                echo json_encode($average);



        }

Answer 1

如果函数 set_teacher_average_rating() 未被任何其他函数调用，请尝试此操作：

public function set_teacher_average_rating()
    {
        $this->autoRender = false;
        if($this->request->is('get'))
        {
            $author_id = $this->request->query('author_id');//
            $rate = $this->Rating->find('all',array('conditions'=>array('author_id'=> $author_id), 'fields'=> array('AVG(Rating.value) as averageRating'), 'recursive' =>-1));

            $average = $rate[0][0]['averageRating'];
            $result = array('success'=>'1' , 'average' => $average );
        }
        else{
            $result = array('success'=>'0','message'=>'request type is not GET');
        }
        return $result;
    }


public function get_teacher_average_rating()
    {
        $this->autoRender = false;
                $average = $this->set_teacher_average_rating();
                $rate = $this->Rating->find('all',array('conditions'=>array('author_id'=> $author_id)));

                     //get rate teacher
                                echo json_encode($average);



        }