How can I use the $ this-> doctrine ()-> getManager () method in the constructor?

My current structure is to have a CommonController and then write the query menu method in it. When the subclass inherits, you must call this method. Can I use the $ this-& amp; gt; doctrine ()-& amp; gt; getManager () function in the constructor. In the constructor... my current structure is to have a CommonController and then write the query menu method in it. When the subclass inherits, you must call this method.
Can I use the $ this-> doctrine ()-> getManager () function in the constructor. An error is reported when I write it in the constructor. The has () cannot be found ().
What can I do? Thank you ~

Parent. php

class AParent{    private $menu;    public function __construct(){            $this->menu = $this->doctrine()->getManager()                        ->getRepository(Menu')->findAll();    }}

Child. php

class Child extends AParent{    public function __construct(){        parent::__construct();        var_dump(parent::$menu);    }}

Reply content:

My current structure is to have a CommonController and then write the query menu method in it. When the subclass inherits, you must call this method.
Can I use the $ this-> doctrine ()-> getManager () function in the constructor. An error is reported when I write it in the constructor. The has () cannot be found ().
What can I do? Thank you ~

Parent. php

class AParent{    private $menu;    public function __construct(){            $this->menu = $this->doctrine()->getManager()                        ->getRepository(Menu')->findAll();    }}

Child. php

class Child extends AParent{    public function __construct(){        parent::__construct();        var_dump(parent::$menu);    }}

If this is the case, you need to use Dependency Injection:

Your

class AParent{    private $menu;    public function __construct(){            $this->menu = $this->doctrine()->getManager()                        ->getRepository('Menu')->findAll();    }}

You can change it:

class AParent{    private $menu;    private $container;    public function __construct( $container){        $this->container = $container    }    public function makeMenu()    {        $this->menu = $this->container->get('doctrine')->getManager()                        ->getRepository('Menu')->findAll();    }    public function getMenu()    {        return $this->menu;    }    public function setMenu( $menu)    {        $this->menu = $menu;        return $this;    }}

Use in controller:

public function indexAction(){    $menuBuilder = new \XXX\XXX\AParent( $this->container );    $menuBuilder->makeMenu();    $menu = $menuBuilder->getMenu();}

You can also set it to servive:

Services. yml:

services:    menu.builder:        class: XXX\XXX\AParent        arguments: [@service_container]

Then use the following in the controller:

public function indexAction(){    $menuBuilder = $this->get('menu.builder');    $menuBuilder->makeMenu();    $menu = $menuBuilder->getMenu();}