Laravel 无法从枢轴模型本身访问枢轴附加列

Question

I have a pivot model called UserTask in which I have an accessor function:

class UserTask extends Pivot implements HasMedia
{
    use HasMediaTrait;

    public function getCompletedAttribute()
    {
        return $this->getMedia()->isEmpty() && $this->completed;
    }



    public function task()
    {
        return $this->belongsTo(Task::class);
    }

}

I specify the relation in my Task model like this:

class Task extends Model
{

    public function users()
    {
        return $this->belongsToMany(User::class, 'user_task')->using('App\Models\UserTask')->withPivot('completed');
    }
}

I get the following error:

"message": "Undefined property: App\\Models\\UserTask::$completed",

Anyone know why this is happening?

Answer 1

Try this accessor function:

public function getCompletedAttribute($value)
{
    return $this->getMedia()->isEmpty() && $value;
}