eatvio-infra/database/seeders/BlogPostSeeder.php

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;
use App\Models\BlogPost;
use App\Models\User;
use App\Models\BlogPostComment;
use App\Models\Tag;

class BlogPostSeeder extends Seeder
{
    /**
     * Run the database seeds.
     */
    public function run(): void
    {
        $blogPosts = BlogPost::factory()->count(10)->create();

        if (User::count() > 0 && BlogPost::count() > 0) {

            $blogPosts->each(
                function ($blogPost) {
                    User::inRandomOrder()
                        ->first()
                        ->author_of_blog_post()
                        ->attach($blogPost->id);
                }
            );

            $comments = BlogPostComment::factory()->count(5)->make();

            $comments->each(
                static function ($comment): void {
                    $comment->author()->associate(
                        User::inRandomOrder()
                            ->first()
                            ->id
                    );

                    $comment->blog_post()->associate(
                        BlogPost::inRandomOrder()
                            ->first()
                            ->id
                    );

                    $comment->saveOrFail();
                }
            );

            $blogPosts = BlogPost::all();

            $blogPosts->each(
                static function ($blogPost): void {

                    $tags = Tag::factory()->count(5)->create();

                    $tagsIds = collect($tags)->map(fn($curTag) => $curTag['id']);
                    $blogPost->tags()->attach($tagsIds);
                }
            );
        }
    }
}