I need help with my laravel 11 project. I have a table which acts as a morph table which would work with morphedByMany. But for this particular model I only need to retrieve one entry. My tables are: Site, Domain and then the intermidiate table: Siteable. Siteable defines the site_id, siteable_type and siteable_id columns. The following relationship defined at the Site model would retrieve all of my domains for the site, but a site should only have one domain:

public function domains(): MorphToMany
{
    return $this->morphedByMany(Domain::class, 'siteable');
}

I tried to change this to:

public function domain(): HasOneThrough
{
    return $this->hasOneThrough(Domain::class, Siteable::class, 'siteable_id', 'id', 'id');
}

Basically, a Site can have one domain, and as many of other models as it chooses, thus the following schema:

Schema::create('siteables', function (Blueprint $table) {
    $table->ulid('id')->primary()->index();
    $table->foreignUlid('site_id')->index()->constrained()->onUpdate('cascade')->onDelete('cascade');
    $table->ulidMorphs('siteable');
    $table->timestamps();

    // define indexes for performance
    $table->index(['site_id', 'siteable_type', 'siteable_id']);
});

What am i missing to retrieve one record?