Laravel 5.2保存模型保存关系

Question

我有一个有两种关系的用户模型：

//User model

function profile() {
   return $this->hasOne(Profile::class);
}

public function photos() {
    return $this->hasMany(Photo::class);
}

我想在创建用户时保存关系数据。

想法是在保存用户之前发送一个事件，并更改一些关系数据

类似的东西：

$profile = new Profile;
$profile->fill($profileData); // I don't want to persist it right now

$photos = [];
foreach ($photosData as $photoData) {
    $photo = new Photo;
    $photo->fill($photoData);
    $photos[] = $photo;
}

$user = new User;
$user->data = "data";

$user->profile() // Do something
$user->photos() // Do something

event(new UserWillBeCreated($user));

$user->save(); // this will create in database Profile, Photos and user

在我的活动的监听者中，我可以在保存之前更新个人资料数据

  $user->profile->name = "another name";