Software Development on Team Qameta

We Will Be Driving Autonomously Long Before Any AI Provider Is Liable for Generated Code

Fri, 24 Apr 2026 00:00:00 +0000

At some point, no human will need to be behind the wheel anymore. That’s not a question of if, but when. Yet while autonomous vehicles are on their way to being fully accepted — socially and legally — will an AI provider ever take on liability for generated code? Very unlikely — and for one fundamental reason: the difference between a closed and an open system.

Deploy Vaultwarden Password Manager to Dokku Micro PaaS

Sat, 28 Dec 2024 17:12:00 +0100

Having an easy to use password manager using an existing Dokku setup is a great way to keep your passwords secure. In this post, I will show you how to deploy Vaultwarden Password Manager to Dokku Micro PaaS using a Dockerfile. Including DB setup, SSL and backup.

Identify unused Routes in Ruby on Rails

Fri, 17 May 2024 12:26:00 +0100

Rails routes map URLs of a Ruby on Rails application to controller actions. As a project grows, many new routes get added and older ones might become obsolete. Cleanup of unused routes is a good practice to keep the codebase clean and maintainable. This article shows how you can identify unused routes in Ruby on Rails before 7.1 and after 7.1 with built-in tooling.

Use Geocoder and MaxMind DB to Geocode IP Addresses

Wed, 29 Nov 2023 10:26:00 +0100

Utilizing IP addresses for communication is a fundamental aspect of many web applications employing HTTP(S) as their protocol, particularly those interconnected to the internet. However, a multitude of IP addresses are also generated through protocols such as SSH, SMTP, or IMAP. In this article, we’ll explore how to determine their origins and extract valuable data using the geocoder gem in conjunction with the MaxMind GeoLite2 Database.

Default URL Options in Ruby on Rails

Fri, 01 Sep 2023 15:45:00 +0100

Like most Ruby developers you have to set a default_url_options on a Ruby on Rails project. Depending on the use case you have to set several of them with different values.

The name of the method default_url_options is the same, but it is used in different contexts (controller, mail, or file storage, it may be confusing and can even have side effects for your project you have to figure out yourself. Depending on the value you set, they may be reused in other contexts like ActiveStorage, ActionMailer, and third-party gems like devise. I couldn’t find any official documentation for the most common cases (web, mail, file storage, test), I’ve written one.

Working with Legacy Ruby on Rails: spring.gem fork() Crash

Thu, 17 Aug 2023 10:25:00 +0100

Working with legacy Ruby on Rails applications is for most developers a problem, as they have a lot of extra work to do:

Use older documentation, which matches the legacy project
can’t use fixes and improvements of programming language
can’t use improvements and features of up-to-date framework version
have to use older and mostly unsupported third-party extensions
are maybe forced to write code, which must be changed for updates and upgrades

First of all, many developers will hit the CPU architecture change from x86/x64 to ARM64 using Apple Macs. Even installing older Ruby versions on a newer OS (operating system) on a x86/x64 architecture is hard. It produces a lot of problems, warnings, and errors.

Analyzing SassC::SyntaxError in Ruby on Rails 7.0

Thu, 29 Jun 2023 14:16:00 +0100

I was running a up to date Ruby on Rails 7.0 project using cssbundling-rails. The project was in production for several months. After pushing the code to Continuous Integration (CI) using GitHub Actions it failed with an error:

Deploy Ruby on Rails 7.0 to Dokku micro PaaS

Thu, 22 Jun 2023 17:02:00 +0100

This tutorial was tested with Dokku version 0.34.0

Deploying a Ruby on Rails application to a Dokku instance is pretty forward. There are only a few things you have to consider. In this guide, I will tell you, what might be the things and how to solve them. I was missing a complete guide with explanations aligned to the deployment of a default Ruby on Rails application.

Fixing require LoadError as an example for the matrix gem

Thu, 15 Jun 2023 16:52:00 +0100

Some gems like matrix or rexml were added at some point to ruby becoming so-called default gems. But they may be removed from being default in newer ruby versions, resulting in broken builds like for us with prawn:

Analyzing Geofeed Technology to improve IP networks

Tue, 28 Mar 2023 13:31:00 +0100

Geofeed is a list of IP networks with basic geolocation information. It is published using CSV format through an http(s) address. Most of these addresses are shared informally between trusted parties. Some were published on sites like Reddit: Starlink has published IP Geolocation mapping.

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Thu, 09 Mar 2023 15:35:00 +0100

Fix Flaky Rails System Tests caused by slow scrolling or animations

Fri, 03 Mar 2023 14:12:00 +0100

Flakiness on browser-based system tests (integration tests) in Ruby on Rails may have a lot of different reasons. One is scrolling, which may be slowed down by browser setup (smooth scrolling), JavaScript callbacks which result in some kind of events like for animations, etc.

Howto migrate from Webpacker to jsbundling-rails in Ruby on Rails

Thu, 23 Feb 2023 12:23:00 +0100

A lot of Ruby on Rails applications created with Ruby on Rails version 5.x or 6.x or even upgraded from the previous versions are using webpacker as their primary asset pipeline. But now as webpacker has retired, it is time to move on. jsbundling-rails is or will be the most obvious step to go. Don’t try to move to importmap-rails directly, as you may encounter more problems you have to solve.

Howto migrate from Webpacker to cssbundling-rails in Ruby on Rails for CSS

Wed, 15 Feb 2023 14:25:00 +0100

A lot of Ruby on Rails applications created with Ruby on Rails version 5.x or 6.x or even upgraded from the previous versions are using webpacker as their primary asset pipeline. But now as webpacker has retired, it is time to move on. cssbundling-rails is or will be the most obvious step to go.

Howto remove sprockets-rails from you Ruby on Rails project

Mon, 13 Feb 2023 14:21:00 +0100

Before removing sprockets-rails from dependencies of your Ruby on Rails project, check whether you are surfing images or fonts using sprockets through assets paths like:

app/assets/images
app/assets/fonts

… or any other assets except Style Sheets (CSS):

app/assets/js

If you are using cssbundling-rails the sprockets default path for Style Sheets is used by default:

Copy Files Compressed with Tar via ssh from and to a Linux Server

Mon, 30 Jan 2023 17:09:00 +0100

Copying files from a development machine or a server to another one may take up a lot of time, resources and traffic which dependent on the task may be more or less a problem. There are common Linux/Unix tools like scp and rsync to do the job, but they may be a wrong choice dependent on the task like:

New Alternative Search Engine: neeva and neevaAI

Thu, 26 Jan 2023 15:26:00 +0100

Today the new neevaAI search engine launched on Product Hunt. This is the third launch on Product Hunt with all new added AI functionality.

What is neeva?

Neeva is an alternative search engine focusing on better results. They say about theirself:

To use or not to use assert_predicate with minitest in Ruby

Mon, 16 Jan 2023 16:50:00 +0100

Recently RuboCop started to blame my assert something.booked? style tests in minitest and telling me this:

Minitest/AssertPredicate: Prefer using `assert_predicate(something, :booked?)`.

I’ve looked for the corresponding Pull Request and also checked the final Rubocop Minitest Style Guide: Assert Predicate.

According to the documentation, we can read:

Target Alternative Search Engines through IndexNow

Tue, 03 Jan 2023 16:19:00 +0100

Targeting alternative Search engines by simply looking to search engines market number may look like a waste of time, but there is a lot of value we may miss. IndexNow Technology is here to help you with this target.

Why targeting alternative search engines at all?

Targeting alternative Search engines to Google may look like a waste of time because of the market reach Google has, but there are many reasons you may consider:

Continuous Delivery

Thu, 08 Dec 2022 13:12:49 +0100

Delivering continuous and high-quality software is an important part of software development. By combining Continuous Integration and automated deployment through a Continuous Delivery System we can:

Deploy a branch on a separate staging environment for review
Merged code into staging branch can be deployed to staging test system for review.
Production-ready code merged to the production branch can be deployed automatically by the system without a trigger by the developer making it a repeatable and bulletproof process.

These are only view cases you may use a Continuous Delivery for. But to make it a success, you need to provide a special ground in your software development.

Define Default URL for ActiveStorage to fix Mixed Content Error

Tue, 15 Nov 2022 17:06:00 +0100

Using ActiveStorage with external services like AWS S3 for saving and surfing attachments like images is great. The setup is well explained in Active Storage Overview in Ruby on Rails Guides.

But if you start using it, you will maybe encounter some problems, which are not that easy to find or debug, as they mostly appear in production. One of the problems we encountered was a Mixed content related to ActiveStorage. This was not a big problem at first, as you get only a warning in a browser with default configuration. But after we added an iOS App, which was using WkWebViews, some random redirects to AWS S3 images stopped working. We couldn’t even see connections for these images to ActiveStorage endpoint of our Ruby on Rails Application in logs, which made it harder to debug.

Continuous Integration

Fri, 11 Nov 2022 13:12:49 +0100

As software change all time, modern software development needs a system, which checks these changes for:

can be built?
can be started?
is working as expected
is secure

A Continuous Integration System (CI) is an essential tool in our workflow and can:

Test Driven Development

Wed, 09 Nov 2022 10:12:49 +0100

Test Driven Software Development is our philosophy and for us the most important quality factor we can rely and improve on. By having a reliable test suite you:

Have a living documentation of your software
Knowledge around implementation is readable and executable
Have tests to stop bugs reappear in production
You can automate on it a lot of additional things like updates of third-party components

We Write Tests First

A very important point is to write tests first, to cover the thoughts and cases a developer is thinking about while trying to solve them in software. What you get on this approach for free:

Define Canonical URL in a Hugo Theme

Mon, 31 Oct 2022 10:59:00 +0100

Hugo is a Static site generator, but links to your site may contain optional parameters like ref=... which may produce duplicate content for search engines. You can use canonical URL to define, which URL should be used by Google and co.

Imprint

Mon, 10 Oct 2022 10:40:25 +0100

Konstantin Filtschew
Using business name: Team Qameta
Rudolf-Dietz-Str. 4
65550 Limburg
Germany

Vat ID: DE263051243

D-U-N-S®-Number: 3141 97656

Contact by mail: info@qameta.com

Happy to get also unwanted (spam) mail. We will use them for good.

Data Protection Policy

Sun, 15 May 2022 10:32:47 +0100

The Team Qameta website is operated by individuals who prioritize data protection. We expect our privacy and personal information to be respected, just as we respect yours.

Who is responsible?

Konstantin Filtschew
Rudolf-Dietz-Str. 4
65550 Limburg
Germany

Phone: +49 (0)177 675 10 53
Email: privacy@qameta.com