exchange-2.0/app/Models/QAQuestions.php

<?php

namespace App\Models;


use Illuminate\Database\Eloquent\Relations\BelongsTo;

class QAQuestions extends AbstractModel
{
	protected $table = 'qa_questions';

    /**
     * @return BelongsTo
     */
    public function questionnaire(): BelongsTo
    {
        return $this->BelongsTo(QAQuestionnaireSet::class, 'questionnaire_set_id', 'id');
    }

    /**
     * @return HasMany
     */
    public function userAnswers()
    {
        return $this->hasMany(QAUserAnswerSelected::class, 'question_id', 'id');
    }
}