你能給我一些澄清學說

Question

的Symfony2的查詢

請任何人能解釋這些Doctrine指令上Symfony2框架

1. $academicYear = $em->getRepository('ComAkSolutionsSmsUserBundle:AcademicYear') 
         ->find($id); 

2. public function manageAcademicClassAction($classId, Request $request) 
    { 

    $em = $this->getDoctrine()->getManager(); 
    $academicClass = $em->getRepository('ComAkSolutionsSmsUserBundle:AcademicClass') 
       ->find($classId); 



    $academicYear = $em->getRepository('ComAkSolutionsSmsUserBundle:AcademicYear') 
       ->find($academicClass->getAcademicYearId()); 


3. $students = $em->getRepository('ComAkSolutionsSmsUserBundle:StudentProfile') 
         ->findBySectionId($sectionId); 

4. $teacherProfile = $em->getRepository('ComAkSolutionsSmsUserBundle:TeacherProfile') 
         ->findOneByUser($user); 

Answer 1

find()是在基礎doctrine repository的方法來查找按主鍵的記錄。前兩個例子是相同的，你只是查找不同的存儲庫。

你的第三和第四個例子是custom repositories並且實現了它們自己的方法findBySectionId（）和findOneByUser（）。