在 Symfony4 中將 Doctrine-Entity 依賴注入到服務中？

Question

我正在嘗試通過 DI 將實體注入到服務中。

實體是通過 Doctrine-JSON-ODM-library ( https://github.com/dunglas/doctrine-json-odm ) 從數據庫中的 JSON-Field 創建的（從用戶請求中查詢）。

我通常會編寫一個上下文類，它需要請求和存儲庫來返回依賴項（如此處所述https://blogs.cuttingedge.it/steven/posts/2015/code-smell-injecting-runtime-data-into -組件/ ）。 但是，由於我的依賴項依賴於樹結構內的深層嵌套數據，因此這似乎不可行。

/* Doctrine-Entity queried from DB with User-Request-Parameters */
class Page
{
    /**
     * @var Slot[]
     * @ORM\Column(type="json_document", options={"jsonb": true})
     */
    private $slots = [];
}

/* First level of nesting */
class Slot
{
    /** @var Components[] */
    private $components;
}

/* Entity to be injected */
class Component
{
   // multiple data-fields
}

// Service which will need to work with the Component-Data
class ComponentRenderService
{
   // multiple functions which all need (read)-access to the
   // Component-data
}

如何解決通過深度嵌套結構創建的依賴項？

Answer 1

添加到我對原始帖子的評論中，一旦您將實體作為方法參數傳遞，您就可以將其設置為類變量，即：

$service->method($entity)

class Service 
{

    private $entity;

    public function method($entity) // You call this somewhere
    {
       // If I understood you correctly, this is what you need
       $this->entity = $entity; // You set it as a class variable (same as DI does in constructor)

       // do stuff to $this->entity
    }


   public function otherMethod()
   {
      // you can access $this->entity here provided that you called `method` first
   }

}