education-project/database/migrations/2020_11_17_164043_create_students_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateStudentsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('students', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('user_id')->unique();
            $table->string('photo')->nullable();
            $table->string('name')->nullable();
            $table->string('surname')->nullable();
            $table->string('patronymic')->nullable();
            $table->unsignedInteger('class_id')->nullable();
            $table->string('information_about_me')->nullable();
            $table->timestamps();

            $table->foreign('user_id')
                ->references('id')->on('users')
                ->onDelete('cascade');
            $table->foreign('class_id')
                ->references('id')->on('school_classes')
                ->onDelete('set null');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('students');
    }
}