This is a checklist I use to work on issues. For this purpose I extracted several cards related to the...
Rails partials have a lot of "hidden" features and this card describes some non-obvious usages of Rails Partials.
In the past we validate and set default values for boolean attributes in Rails and not the database itself.
Since Rails 7 you are able to encrypt database information with Active Record. Using Active Record Encryption will store an...
To retrieve only unique combinations of the selected attributes: You can omit rows, where all selected columns are equal with...
Das Standardtool für Monitoring auf AWS ist Cloudwatch. Du hast dir in den AWS Kapiteln Cloudwatch sicherlich schon grundsätzlich angesehen...
Mit SQL spricht man mit relationalen Datenbanken. Ziele Verstehe die folgenden SQL Befehle SELECT WHERE ORDER INNER JOIN, LEFT JOIN...
When an object is created / updated, various callbacks are executed in this order: before_validation after_validation before_save
We had a strange behaviour on one of our mariadb-servers: Everyday at around midnight we saw that the root...
When changing glibc versions, it's possible to end up with corrupt indexes in PostgreSQL. Are My Indexes Affected?
When changing the glibc version, it's possible that the upgrade also includes changes to how locales work.
The Oracle mysql client has an odd behavior if your server uses latin1 as default character-set-server. Command
Erfülle die Aufgaben Zeige deinem Mentor in einer Live-Demo was du umgesetzt hast. Wenn du Aufgabe 4 betrachtest...
You might use screen or tmux to run a temporary command on a server which continues to run after the...
The owner of a scheduled CI/CD pipeline in GitLab will always be notified if the pipeline fails. Follow these steps...
If you're frequently switching between projects, you might be annoyed by RubyMines behavior of opening the last project on...
Wir arbeiten in einem Umfeld in dem sich fast alles um das Web und HTTP dreht. Wir betreiben Webseiten und...
Der zuverlässige und perfomante Betrieb von relationalen Datenbanken kann sehr aufwendig und komplex sein. Dies gilt vor allem, wenn man...
If you're experiencing that your bundle install command fails with an error message like this, rubygems.org might...
Unpoly's [up-observe], [up-autosubmit] and [up-validate] as well as their programmatic variants up.observe() and up.autosubmit...
tl;dr Since Rails 7+ you can use ComparisonValidator for validations like greater_than, less_than, etc. on dates, numerics...
Here are a few common patterns that will probably lead to flaky specs. If you notice them in your specs...
tl;dr git checkout is the swiss army of git commands. If you prefer a semantically more meaningful command for...
The robots.txt file and HTML tag can be used to control the behavior of search engine crawlers. Both have different...