'integer', ]; public function kelas() { return $this->belongsToMany( Kelas::class, 'challenge_kelas', 'id_challenge', 'id_kelas' ); } public function soal() { return $this->hasMany(SoalChallenge::class, 'id_challenge'); } public function peserta() { return $this->hasMany(PesertaChallenge::class, 'id_challenge'); } public function guru() { return $this->belongsTo(Guru::class, 'id_guru', 'id_guru'); } }