在LARAVEL中，模型的可翻译属性为null

如何解决在LARAVEL中，模型的可翻译属性为null

类别模型

class Category extends Model implements TranslatableContract
{
    use Translatable;    
    protected $table = "categories";
    public $translatedAttributes = ['title'];
    protected $fillable = ['slug'];
    protected $hidden = ['created_at','updated_at','deleted_at','translations'];


    public function meals()
    {
        return $this->hasMany('App\Meal');           
    }
}

class CategoryTranslation extends Model
{    
    public $timestamps = false;
    protected $fillable = ['title'];  
}

类别模型的工厂

$factory->define(Category::class,function (Faker $faker) {   
    
    static $i = 1;         
    $locales = Language::pluck('lang');
    $data = array('slug' => Str::slug('category '.$i,'-'));    
    
    foreach ($locales as $locale){
        $data[$locale] = [
            'title' => 'Naslov kategorije '.$i.' na '.$locale.' jeziku'       
        ];              
    }                       
    $i++;

    return $data;

我的title属性显示为空，而不是我尝试声明的可翻译属性标题的种子字符串。所有其他标题属性都可以正常工作，如下所示。我将5种语言用于本地化，其中一种是ru，所以标题基本上应该说：俄罗斯语言上的类别标题，就像它在数据的其他属性的标题上说的那样。

这就是响应的样子。

{
"meta": {
    "currentPage": 1,"totalItems": 7,"itemsPerPage": 10,"totalPages": 1
},"data": [
    {
        "id": 3,"status": "created","title": "Naslov jela 15 na ru jeziku","description": "Opis jela 15 na ru jeziku","ingredients": [
            {
                "id": 1,"slug": "ingredient-1","title": "Naslov sastojka 1 na ru jeziku"
            },{
                "id": 2,"slug": "ingredient-2","title": "Naslov sastojka 2 na ru jeziku"
            },{
                "id": 6,"slug": "ingredient-6","title": "Naslov sastojka 6 na ru jeziku"
            }
        ],"category": {
            "id": 3,"slug": "category-3","title": null         //<--------------------------------
        },"tags": [
            {
                "id": 4,"slug": "tag-4","title": "Naslov taga 4 na ru jeziku"
            }
        ]
    }