applicant-site/app/Http/Requests/Catalog/StoreDepartmentRequest.php

<?php

namespace App\Http\Requests\Catalog;

use Illuminate\Contracts\Validation\ValidationRule;
use Illuminate\Foundation\Http\FormRequest;

class StoreDepartmentRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array<string, ValidationRule|array|string>
     */
    public function rules(): array
    {
        return [
            'position' => 'required|int|max:255',
            'name' => 'required|string|max:255|unique:educational_institutions,name',
            'description' => 'string',
            'faculty_id' => 'required|int'
        ];
    }
}