Laravel relation return model id insetead of the model itself

Consider this relation:

// in Post model
public function user()
{
    return $this->belongsTo('App\Models\Post');
}

I think $post->user->name should be enough to get the name of post's owner. However $post->user return the user id instead of the user model. So I have to use:

$post->user()->first()->name;

Shouldn't $post->user return the post's owner?

via Chebli Mohamed