CakePHP v3：如何让patchEntity更新请求数据中的关联

请注意,在下面的方法中,我必须在保存之后执行第二次get()以重新读取数据库中的数据.如果我删除它,下一个视图将显示陈旧的关联数据,因为patchEntity更新外键,但实际的关联对象仍然是前一个(从保存之前).

我希望有一种方法可以不连续进行两次数据库查询.这是预期的行为吗？有没有更好的方法呢？

public function edit($id = null)
{
    //1//////////////////////////////////////////
    $screen = $this->Screens->get($id,[
        'contain' => ['Blocks'=>['Datasources'=>['Agencies']]] 
    ]);

    if ($this->request->is(['patch','post','put'])) {

        $screen = $this->Screens->patchEntity(  $screen,$this->request->data,[
                                                    'associated'=>['Blocks.Datasources']
                                                ]
                                            );
        if ($this->Screens->save($screen)) {

            //2//////////////////////////////////////////
            #get the UPDATED properties... specifically,the associations don't get updated automatically by patchEntity above
            $screen = $this->Screens->get($id,[
                'contain' => ['Blocks'=>['Datasources'=>['Agencies']]]
            ]);

            $this->Flash->success('The screen has been saved.');
        } else {
            $this->Flash->error('The screen could not be saved. Please,try again.');
        }
    }

    $this->set(compact('screen'));
}