https://github.com/spatie/first-or-create-racing-condition-demo

A demo Laravel app to demonstrate the dangers of using firstOrCreate in a queued environment
https://github.com/spatie/first-or-create-racing-condition-demo

eloquent laravel php queues

Last synced: 2 months ago
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A demo Laravel app to demonstrate the dangers of using firstOrCreate in a queued environment

• Host: GitHub
• URL: https://github.com/spatie/first-or-create-racing-condition-demo
• Owner: spatie
• Created: 2018-06-19T21:46:38.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2022-03-09T16:22:21.000Z (almost 3 years ago)
• Last Synced: 2024-05-09T22:24:36.516Z (9 months ago)
• Topics: eloquent, laravel, php, queues
• Language: PHP
• Homepage: https://freek.dev/1087-breaking-laravels-firstorcreate-using-race-conditions
• Size: 1.48 MB
• Stars: 7
• Watchers: 4
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        

[](https://supportukrainenow.org)

# A demo Laravel app to demonstrate the dangers of using firstOrCreate in a queued environment

Read [this blogpost on murze.be](https://murze.be/breaking-laravels-firstorcreate-using-race-conditions) first to get familiar with the problem.

## Support us

[](https://spatie.be/github-ad-click/first-or-create-racing-condition-demo)

We invest a lot of resources into creating [best in class open source packages](https://spatie.be/open-source). You can support us by [buying one of our paid products](https://spatie.be/open-source/support-us).

We highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. You'll find our address on [our contact page](https://spatie.be/about-us). We publish all received postcards on [our virtual postcard wall](https://spatie.be/open-source/postcards).

## Usage

To run this demo you'll need to have Redis installed

1. Clone the repo

2. Install the dependencies with `composer install`

3. Copy `.env.example` to `.env`

4. Create a `racing_condition_demo` database

5. Run `php artisan key:generate`

6. Run `php artisan migrate`

7. In a seperate terminal start Horizon with `php artisan horizon`

8. Run `php artisan create-products`

If you look in the `products` table of the database multiple records with the same uuid will have been created.