When a nginx reverse proxy complains about upstreams sending too big headers, tweaking the buffers responsibly can help to prevent...
If you use a newer SSH key generated with the ED25519 algorithm instead of RSA (see Create a new SSH...
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.
HTTP header values must only contain low-ASCII (7-bit) characters for safe transport. From RFC 7230: Historically, HTTP has...
Not all email clients support external images in all situations, e.g. an image within a link. In some cases, a...
Carrierwave's BaseUploader can have some validations that you can use by overriding a certain method, which's expected name...
Since Rails 7 you are able to encrypt database information with Active Record. Using Active Record Encryption will store an...
Sometimes I ran across a GitHub merge request of a gem where it was not completely obvious in which version...
In Rails 5+ you can access a helper from a controller using the helpers method: # Inside a controller action
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...
Du verstehst was eine Custom Resource ist und warum das nützlich sein kann. Du weißt, was ein Operator ist...
Du verstehst, warum man Healthchecks u.ä. haben möchte. Du weißt auch, dass solche Checks nicht exklusiv für Kubernetes...
A severe bug was found in ImageMagick by Bryan Gonzalez from Ocelot Team. It allows to embed the content of...
Rails includes milliseconds in Time / DateTime objects when rendering them as JSON: JSON.parse(User.last.to_json)['created_at'] #=> "2001-01-01...
vertical-align is hard. Have you ever wanted to vertically center an icon with text? This usually means "vertically align...
Im Kapitel 502 Eine Applikation als Container mit CI pipelines deployen hast du eine Applikation auf AWS deployed. In diesem...
Sometimes, the rails dev server doesn't terminate properly. This can for example happen when the dev server runs in...
Du weißt, für was man persistenten Speicherplatz in Kubernetes braucht. Was ist eine StorageClass? Für das Einbinden eines storage...
Du weißt, welcher Linux Service für das starten/stoppen/löschen von Containern zuständig ist. Wie wird die Authentifizierung für Requests...
Du verstehst, welche Aufgaben der Kubernetes API Server übernimmt. Du weißt, wie der API Server in das Management des...
When you use the :as option to map a power to a controller method you can now override the generated...