mailable with relationship eagerload

[toto975]

I try to pass relationship datas to a mailable, but datas are not in the Mailable build.

domaine hasMany actualite.

The Controller

 public function send()
    {
        $domaines = $this->domaineRepository::domaineNewsletter("2022-05-23", "2022-05-30");
        
        $abonnes = Newsletter::where('name', 'MyNewsletter')->first()->users;

        foreach($abonnes as $abonne) {
            Mail::to($abonne->email)
                ->queue(
                    (new PortailNewsletter("title", "Some text", "2022-05-23", "2022-05-30", $domaines))
                        ->onQueue('portailNewsletter')
                    );
        }
    }

The Mailable

use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

use App\Repositories\Portail\DomaineRepository;

class PortailNewsletter extends Mailable
{
    use Queueable, SerializesModels;

    public $title;
    public $subtitle;
    public $date_begin;
    public $date_end;
    public $domaines;

    /**
     * The name of the theme that should be used when formatting the message.
     *
     * @var string|null
     */
    public $theme = "portailNewsletter";

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($title, $subtitle, $date_begin, $date_end, $domaines)
    {
        $this->title= $title;
        $this->subtitle= $subtitle;
        $this->date_begin= $date_begin;
        $this->date_end= $date_end;
        $this->domaines = $domaines;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->from([
                        'address' => 'john.doe@mail.com',
                        'name' => 'John',
                    ])
                    ->subject($title)
                    ->markdown('portail.mail.newsletter');
    }
}

The repository

public static function domaineNewsletter($date_begin, $date_end)
    {

        $callback = function ($query) use ($date_begin, $date_end) {
            $query->where('date_publication', '<=', $date_end)
                ->where('date_publication', '>=', $date_begin)
                ->orderBy('date_publication', 'desc');
        };

        return Domaine::query()->whereHas('actualite', $callback)
                        ->with(['actualite' => $callback])
                        ->get()
                        ;
    }

For the domaines datas :

When i do a dd() in the repository, it's OK, i have the expected datas with relationship and eagerload.
When i do a dd() in the send() function of the Controller, it's OK, i have the expected datas with relationship and eagerload.
When i do a dd() in the __construct() function of the Mailable, it's OK, i have the expected datas with relationship and eagerload.
When i do a dd() in the build() function of the Mailable, it's KO, i have not the expected datas, i have not the relationship and eagerload.

I've tried this in the mailable :

    public function build()
    {
        dd($this->domaines)  <=== not expected datas, all the domaines and all the actualites

        $test= DomaineRepository::domaineNewsletter("2022-05-23", "2022-05-30");
        dd($test); <=== expected datas
}

Why, in the mailable, $this->domaines from the __construct is not available with the expected datas in the build ?
Why we need to recode in the build() to take the expected $domaines ?

[henzeb]

It may have something to do with serializing models. It may not be able to detect the type. Try add typehinting to your $domaines property.

[toto975]

You're right, it has something to do with serializing models

It's about queue, relationship and (de)serialization.

In Laravel doc : https://laravel.com/docs/9.x/queues#handling-relationships

Any previous relationship constraints that were applied before the model was serialized
during the job queueing process will not be applied when the job is deserialized.
Therefore, if you wish to work with a subset of a given relationship,
you should re-constrain that relationship within your queued job.

For me, i've

relationship in controller --> mail queue --> serialization --> job handle --> deserialization --> mailable build

the constrain's relationship in controller must be re-constrain in the mailable build