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.
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...
To retrieve only unique combinations of the selected attributes: You can omit rows, where all selected columns are equal with...
Du verstehst was eine Custom Resource ist und warum das nützlich sein kann. Du weißt, was ein Operator ist...
Let's assume that we have a model Movie that registers a callback function when a new instance of Movie...
Mit SQL spricht man mit relationalen Datenbanken. Ziele Verstehe die folgenden SQL Befehle SELECT WHERE ORDER INNER JOIN, LEFT JOIN...
Using ActiveRecord's #signed_id and .find_signed methods you can create URLs that expire after some time. No conditionals...
When an object is created / updated, various callbacks are executed in this order: before_validation after_validation before_save
To delete a specific redis-DB you need to use the FLUSHDB-command in combination with the SELECT-command. For...
TLDR if you define a equality method for a class you must also implement def hash. Ruby has a lot...
In diesem Kapitel sprechen wir darüber wie Container eigentlich funktionieren. Es ist zwar nicht zwingend erfoderlich um diese zu verwenden...
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 cards editor has a feature "Cite other card" to create links to other cards in the same deck as...
Du hast alle Aufgaben der Card erfüllt Inhalte Configuring the AWS CLI Switching roles (AWS CLI) Aufgaben
tl;dr You should decouple migrations from models by embedding models into the migration. To use STI in this scenario...
You might use screen or tmux to run a temporary command on a server which continues to run after the...
Jasmine specs for the frontend often need some DOM elements to work with. Because creating them is such a common...
The owner of a scheduled CI/CD pipeline in GitLab will always be notified if the pipeline fails. Follow these steps...