<?php namespace Modules\Exams\Entities;
   
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Pingpong\Modules\Exceptions\ModuleNotFoundException;
use Prettus\Repository\Contracts\Presentable;
use Prettus\Repository\Traits\PresentableTrait;

/**
 * Modules\Exams\Entities\Answer
 *
 * @property integer $id
 * @property string $title
 * @property boolean $is_active
 * @property boolean $is_correct
 * @property integer $exam_id
 * @property integer $question_id
 * @property \Carbon\Carbon $created_at
 * @property \Carbon\Carbon $updated_at
 * @property string $deleted_at
 * @property-read \Modules\Exams\Entities\Exam $exam
 * @property-read \Modules\Exams\Entities\Question $question
 * @property-read \Illuminate\Database\Eloquent\Collection|\Modules\Students\Entities\Student[] $student
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereId($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereTitle($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereIsActive($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereIsCorrect($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereExamId($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereQuestionId($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereCreatedAt($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereUpdatedAt($value)
 * @method static \Illuminate\Database\Query\Builder|\Modules\Exams\Entities\Answer whereDeletedAt($value)
 * @mixin \Eloquent
 */
class Answer extends Model implements Presentable {

    use PresentableTrait,
        SoftDeletes;
    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'answers';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['title', 'is_active', 'is_correct', 'exam_id', 'question_id'];

    /**
     * Get the exam for the answer
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function exam()
    {
        return $this->belongsTo('Modules\Exams\Entities\Exam');

    }

    /**
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function student()
    {
        return $this->belongsToMany('Modules\Students\Entities\Student')->withPivot(['id', 'exam_id']);
    }

    /**
     * Get the questions for the answer
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function question()
    {
        return $this->belongsTo('Modules\Exams\Entities\Question');

    }
}