find() does not get the existing row

I have a resource Controller with this index method like this:

public function index()
{
        $args = [];
        $args = array_merge($args, $this->data_creator(35, 12, 'book'));
        $args = array_merge($args, $this->data_creator(37, 12, 'kit'));
        $args = array_merge($args, $this->data_creator(38, 12, 'game'));

        $args['menu_links'] = [
            'books'     => route('shopping-products.category', Category::find(25)->slug),
            'videos'    => route('shopping-products.category', Category::find(24)->slug),
            'kits'      => route('shopping-products.category', Category::find(23)->slug),
            'games'     => route('shopping-products.category', Category::find(22)->slug),
        ];
    
        return view('frontend.shop.products.index', $args);
}

But it returns this error:

Trying to get property ‘slug’ of non-object

And when I dd(Category::find(25), Category::find(24), Category::find(23), Category::find(22)); I get NULL results.

Meaning that it can not find data with specified ids.

However there are 25 records stored at the categories table:

So what is going wrong here?

UPDATE #1:

Category.php Model:

class Category extends Model
{
    use Sluggable, SoftDeletes;

    protected $table = 'categories';
    protected $primaryKey = 'cat_id';
    protected $guarded = [];

    /**
     * Return the sluggable configuration array for this model.
     *
     * @return array
     */
    public function sluggable()
    {
        return [
            'slug' => [
                'source' => 'cat_name'
            ]
        ];
    }

    public function path()
    {
        return "/products/categories/$this->slug";
    }

    public function children()
    {
        return $this->hasMany(Category::class, 'cat_parent_id', 'cat_id');
    }

    public function parents()
    {
        return $this->hasMany(Category::class, 'cat_id', 'cat_parent_id');
    }

    public function products()
    {
        return $this->belongsToMany(Product::class, 'category_products', 'ctp_cat_id', 'ctp_prd_id');
    }

    public function news()
    {
        return $this->belongsToMany(News::class, 'category_news', 'ctn_cat_id', 'ctn_nws_id');
    }

    public function galleries()
    {
        return $this->belongsToMany(Gallery::class, 'category_galleries', 'ctg_cat_id', 'ctg_gly_id');
    }

    public function uploaded()
    {
        return $this->hasMany(UploadedFile::class, 'upf_object_id', 'cat_id')->where('upf_object_type_id', '=', '107');
    }

    public function articles()
    {
        return $this->belongsToMany(Article::class, 'article_category', 'act_cat_id', 'act_art_id');
    }

    public function olympiadExam()
    {
        return $this->belongsToMany(OlympiadExam::class, 'olympiads_exams_categories', 'oec_ole_id', 'oec_cat_id');
    }

    public function olympiadExamQuestion()
    {
        return $this->belongsToMany(OlympiadExamQuestion::class, 'olympiads_exams_questions_categories', 'oes_cat_id', 'oes_oeq_id')->orderBy('oeq_number', 'asc');
    }

    public function attr_attributes()
    {
        return $this->hasMany(CategoryAttribute::class, 'category_id', 'cat_id');
    } //

    public function attr_product()
    {
        return $this->hasMany(Product::class, 'prd_cat_att_id', 'cat_id');
    } //

    public function couponRelation()
    {
        return $this->hasMany(couponRelation::class, 'object_id', 'cat_id')->where('object_type', 'product_category');
    }

    public function magazines()
    {
        return $this->belongsToMany(Magazine::class, 'category_magazine', 'category_id', 'magazine_id');
    }

}

UPDATE #2:

Result of dd(Category::where('cat_id', 25), Category::where('cat_id', 24), Category::where('cat_id', 23), Category::where('cat_id', 22));:

UPDATE #3:

Result of dd(Category::where('cat_id', 25)->get(), Category::where('cat_id', 24)->get(), Category::where('cat_id', 23)->get(), Category::where('cat_id', 22)->get());

Answer

If you use SoftDeletes trait then laravel just update deleted_at column. The column isn’t actually deleted from database, it just marked as delete. To find columns which is softly deleted, use Model::withTrashed()->find().

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Answer