Trying to get property 'id' of non-object. How to fix?

Question

css

When creating a bundle, a ui is created, but does not return an id value.
model test:

class test extends Model
{
    use HasFactory;

    protected $guarded = [];

    public function ui_name() {
        return $this->belongsTo('App\Models\Uis', 'name_id', 'id');
    }

    public function ui_desc() {
        return $this->belongsTo('App\Models\Uis', 'desc_id', 'id');
    }
}

UI Model:

class Uis extends Model
{
    use HasFactory;

    protected $guarded = [];

    public function category() {
        return $this->hasOne('App\Models\Categories\Category', 'ui_id', 'id');
    }

    public function tag() {
        return $this->hasOne('App\Models\Tags\Tag', 'ui_id', 'id');
    }

    public function test_name() {
        return $this->hasOne('App\Models\Tests\test', 'name_id', 'id');
    }

    public function test_desc() {
        return $this->hasOne('App\Models\Tests\test', 'desc_id', 'id');
    }
}

controller:

$test = new test();
        $test->ui_name()->create([
            'text' => "TEXT",
            'desc'=> "TEXT",
            'module_id' =>1, 
            'isHTML' => false
        ]);

tests table:

Schema::create('tests', function (Blueprint $table) {
            $table->id();

            $table->bigInteger('name_id');
            $table->bigInteger('desc_id')->nullable();
            $table->integer('max_ball')->default(20);
            $table->string('password')->nullable();
            $table->string('special_link')->unique()->nullable();
            $table->timestamps();
        });

uitable:

$table->id();
            $table->string('text');
            $table->text('desc');
            $table->bigInteger('module_id')->nullable();
            $table->boolean('isHTML')->default(false);
            $table->timestamps();

Warning:

ErrorException
Trying to get property 'id' of non-object

Answer 1

.owl-item.active:first-of-type

Answer 2

:first-child will just look for the first element in the block and not the first among .active
if the first element is not .active then the .active:first-child selector will not work
reset can be done via :not(.active) for example

Answer 3

$test = new test();
You created an object but didn't save it to the database. And since you didn’t do this, you don’t have the id property either.