教义ORM关联的默认值 [英] Default value of Doctrine ORM association

问题描述

我有实体（如下）。我想在创建时设置一些默认值。
正如你在 __构造中可以看到的，很容易设置 $ name （string），但是如何设置 $ group ？ （例如，我知道在数据库中有一个 id = 122 的组）

 $ b * / 
 class Person {
 private $ id; 
 
 / ** @ ORM\Column（type =string）* / 
 private $ name; 
 
 / ** 
 * @ ORM\ManyToOne（targetEntity =Group，inversedBy =persons）
 * @ ORM\JoinColumn（referencedColumnName =id ）
 * / 
 private $ group; 
 
 public function setGroup（Group $ group）
 {
 $ this-> group = $ group; 
 $ group-> addPerson（$ this）; 
} 
 
 // ... setters / getters 
 
 //构造默认Person 
 public function __construct（）
 {
 $ this-> setName（Mike）; 
 $ this-> setGroup（$ EXISTING_GROUP_FROM_MY_DB）; //< -------------- 
} 
} 
  

解决方案

我同意moonwave99这是糟糕的设计。在这里，您尝试从不是容器感知的地方访问数据库（通过Doctrine服务）（即不知道Doctrine不应该知道）。

实际上，我最近有一个类似的问题...几乎是相同的确切问题。但我不希望这个逻辑在控制器内。所以我写了一个服务来照顾用户创建。而且我把这个服务访问了唯一需要的其他服务：Doctrine。

这里有一个例子，用户创建了所有可用的角色：

 命名空间MyBundle\Entity; 
 
 class UserFactory 
 {
 private $ doctrine; 
 
公共函数__construct（$ doctrine）
 {
 $ this-> doctrine = $ doctrine; 
} 
 
 public function generateNewUser（$ email，$ password）
 {
 $ user = new User（）; 
 
 //由于您可以访问Doctrine服务，您可以使用$ this-> doctrine 
 //来执行您通常使用$ this-> getDoctrine（）
 $ roles = $ this-> doctrine-> getEntityManager（） - > getRepository（MyBundle：Role） - > findAll（）; 
 
 foreach（$ roles as $ role）
 {
 $ user-> addRole（$ role）; 
} 
 
 return $ user; 
} 
} 
  

现在在 config.yml 或 services.yml ，记得要通过Doctrine服务：

 服务：
 mybundle.factory.user：
类：MyBundle\Entity\UserFactory 
参数：['@doctrine'] 
  

就是这样...现在，在控制器中，您可以通过执行以下操作创建一个新用户： p>

  public function MyController（）
 {
 $ user = $ this-> get（mybundle.factory .user） - > generateNewUser（[e-mail]，password123）; 
} 
  

I have the entity (such as below). I want to set some default values while creating. As you can see in __construct, it is easy to set the $name (string), but how can I set the $group? (for example I know that there is a group in database with id=122)

/**
 * @ORM\Entity
 */
class Person {
    private $id;

    /** @ORM\Column(type="string") */
    private $name;

    /**
     * @ORM\ManyToOne(targetEntity="Group", inversedBy="persons")
     * @ORM\JoinColumn(referencedColumnName="id")
     */
    private $group;

    public function setGroup(Group $group)
    {
        $this->group = $group;
        $group->addPerson($this);
    }

    // ... setters/getters

    //construct default Person
    public function __construct()
    {
        $this->setName("Mike");
        $this->setGroup($EXISTING_GROUP_FROM_MY_DB); // <<--------------
    }
}

解决方案

I agree with moonwave99 that this is poor design. Here you are trying to access the database (through the Doctrine service) from a place that is not container-aware (i.e. it does not, and should not, know about Doctrine).

I had a similar issue recently... pretty much the same exact issue, actually. But I didn't want this logic to be inside the controller. So I wrote a service to take care of the User creation. And I gave that service access to the only other service it needed: Doctrine.

Here's an example, where a User is created with all available Roles:

namespace MyBundle\Entity;

class UserFactory
{
    private $doctrine;

    public function __construct($doctrine)
    {
        $this->doctrine = $doctrine;
    }

    public function generateNewUser($email, $password)
    {
        $user = new User();

        // Since you have access to the Doctrine service, you can use $this->doctrine
        // to do anything you would normally do in your controller with $this->getDoctrine()
        $roles = $this->doctrine->getEntityManager()->getRepository("MyBundle:Role")->findAll();

        foreach ($roles as $role)
        {
            $user->addRole($role);
        }

        return $user;
    }
}

Now register that service in config.yml or services.yml, remembering to pass the Doctrine service to it:

services:
    mybundle.factory.user:
        class: MyBundle\Entity\UserFactory
        arguments: ['@doctrine']

And that's it... Now, in your controller, you can create a new User by doing:

public function MyController()
{
    $user = $this->get("mybundle.factory.user")->generateNewUser("[e-mail]", "password123");
}

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