Seeding Realistic Data Using AI

CourseSeeder.php

<?php

namespace Database\Seeders;

use App\Models\Course;
use PrismPHP\Prism\Prism;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\File;
use Prism\Prism\Schema\ArraySchema;
use Prism\Prism\Schema\NumberSchema;
use Prism\Prism\Schema\ObjectSchema;
use Prism\Prism\Schema\StringSchema;
use Prism\Prism\Enums\Provider;

class CourseSeeder extends Seeder
{
    public function run(): void
    {
        $path = database_path('fixtures/courses.json');

        if (File::missing($path)) {
            $this->generate();
        }

        $data = json_decode(File::get($path), true);
        Course::insert($data['courses']);
    }

    private function generate(): void
    {
        $courseSchema = new ObjectSchema(
            name: 'course',
            description: 'A web tech course',
            properties: [
                new StringSchema('title', 'Course title'),
                new StringSchema('topic', 'Course topic'),
                new StringSchema('teacher', 'Name of the course instructor'),
                new NumberSchema('duration', 'Course duration in hours'),
            ],
            requiredFields: ['title', 'topic', 'teacher', 'duration']
        );

        $courseListSchema = new ArraySchema(
            name: 'courses',
            description: 'A list of web tech courses',
            items: $courseSchema
        );

        $response = Prism::structured()
            ->using(Provider::OpenAI, 'gpt-4o')
            ->withSchema(new ObjectSchema(
                name: 'career',
                description: 'The career path for a web tech developer',
                properties: [$courseListSchema]
            ))
            ->withPrompt('Generate 10 web tech courses')
            ->generate();

        $path = database_path('fixtures/courses.json');
        File::put($path, json_encode($response->structured));
    }
}