sistem-akademik/database/seeders/ClassStudentSeeder.php

<?php

namespace Database\Seeders;

use App\Models\AcademicYear;
use App\Models\ClassRoom;
use App\Models\ClassStudent;
use App\Models\Student;
use Illuminate\Database\Seeder;

class ClassStudentSeeder extends Seeder
{
    public function run(): void
    {
        $academicYears = AcademicYear::all();
        $classRooms = ClassRoom::all();
        $students = Student::all();

        // Pastikan ada data yang tersedia
        if ($academicYears->isEmpty() || $classRooms->isEmpty() || $students->isEmpty()) {
            return;
        }

        // Distribusikan siswa ke kelas secara merata
        $studentsPerClass = ceil($students->count() / $classRooms->count());
        $studentChunks = $students->chunk($studentsPerClass);

        foreach ($academicYears as $academicYear) {
            $classIndex = 0;

            foreach ($studentChunks as $studentGroup) {
                // Pastikan kita tidak melebihi jumlah kelas yang tersedia
                if ($classIndex >= $classRooms->count()) {
                    break;
                }

                $classRoom = $classRooms[$classIndex];

                foreach ($studentGroup as $student) {
                    ClassStudent::firstOrCreate([
                        'class_room_id' => $classRoom->id,
                        'student_id' => $student->id,
                        'academic_year_id' => $academicYear->id,
                    ]);
                }

                $classIndex++;
            }
        }
    }
}