Add relation to Eloquent Model before create it - laravel-5

Question

I have 2 related Models. They are linked using MorphOne relationship.
First Model is User:
class User extends Model implements AuthenticatableContract, CanResetPasswordContract
{
/**
* Get all of the owning description models.
*/
public function description()
{
return $this->morphTo();
}
}
And second one is associated User type, which in our example is Trainer:
class Trainer extends Model
{
/**
* Get user, which trainer belongs to.
*/
public function user()
{
return $this->morphOne('App\Models\Users\User', 'description');
}
/**
* Event listeners
*/
public static function boot()
{
parent::boot();
static::created(function($item)
{
event(new TrainerCreated($item));
});
}
}
As you can see, I try to use Events for different User types. Inside those Events I want to access associated User Model, like so: $trainer->user But I cannot find right order to save those Models.
What I have for now:
class AuthController extends Controller
{
/**
* Create a new user instance after a valid registration.
*
* #param array $data
* #return User
*/
protected function create(array $data)
{
$user = Users\User::create([
'name' => $data['name'],
'surname' => $data['surname'],
'email' => $data['email'],
'password' => bcrypt($data['password']),
]);
switch ($data['type'])
{
case "trainer":
$supertype = Users\Trainer::create();
break;
default:
$supertype = Users\Visitor::create();
break;
}
if ($supertype)
{
$supertype->user()->save($user);
}
return $user;
}
}
Which throw me error, that I Trying to get property of non-object
I also try another way, which seems more logical:
switch ($data['type'])
{
case "trainer":
$supertype = new Users\Trainer;
break;
default:
$supertype = new Users\Visitor;
break;
}
if ($supertype)
{
$user->description()->associate($supertype);
$supertype->save();
}
Which throws another error Class '' not found.
I tried multiple other ways, like manually setting ids, but they all throw different errors and not associate models properly. Maybe manually set both description_id and description_type will help, but I don't have id to set at this point.

Answer 1

I found working solution:
class AuthController extends Controller
{
/**
* Create a new user instance after a valid registration.
*
* #param array $data
* #return User
*/
protected function create(array $data)
{
$user = Users\User::create([
'name' => $data['name'],
'surname' => $data['surname'],
'email' => $data['email'],
'password' => bcrypt($data['password']),
]);
switch ($data['type'])
{
case "trainer":
$supertype = new Users\Trainer;
break;
default:
$supertype = new Users\Visitor;
break;
}
if ($supertype)
{
$supertype->user()->save($user);
$supertype->save();
$user->description()->associate($supertype);
$user->save();
}
return $user;
}
}
At start need to create User Model and save it. $user = Users\User::create([])
Then we should create Trainer Model instance.
$supertype = new Users\Trainer;
After need to add User Model to MorphOne relationship and only
after this save Trainer Model. This will allow us to use
$trainer->user in TrainerCreated Event.
$supertype->user()->save($user); $supertype->save();
But Model not properly created in database at this point, so we need
to follow usual steps to do it, as we have both Models saved
already.
$user->description()->associate($supertype); $user->save();