|string> */ public function rules(): array { return [ 'santri_id' => 'required|exists:santris,id', 'kelas_id' => 'required|exists:kelas,id', 'mapel_id' => 'required|exists:mata_pelajarans,id', 'tanggal' => 'required|date', 'nilai' => 'required|numeric', 'keterangan' => 'nullable|string', ]; } }