Usually you add errors to :base in ActiveRecord, in case no appropriate attribute could be used to add the error...
Let's say we have posts with an attribute title that is mandatory. Our example feature request is to tag...
Rails offers the fresh_when method to automatically compute an ETag from the given record, array of records or scope...
By activating strict_loading you force developers to address n+1 queries by preloading all associations used in the index...
Since Ruby 3.2.0 you can measure coverage support for eval statements and support has been added for the simplecov gem...
Rails partials have a lot of "hidden" features and this card describes some non-obvious usages of Rails Partials.
Not all email clients support external images in all situations, e.g. an image within a link. In some cases, a...
Since Rails 7 you are able to encrypt database information with Active Record. Using Active Record Encryption will store an...
In Rails 5+ you can access a helper from a controller using the helpers method: # Inside a controller action
How a macro can dynamically define a method that can be overridden with super in the same class.
In a Jasmine spec you want to spy on a function that is imported by the code under test. This...
Jasmine specs for the frontend often need some DOM elements to work with. Because creating them is such a common...
Jasmine specs that work with DOM elements often leave elements in the DOM after they're done. This will leak...
tl;dr The Chrome DevTools are a neat collection of tools for the daily work as a web developer. If...
tl;dr In Chrome DevTools in the Elements tab or in Firefox in the Inspector tab you can right click...
Unpoly's [up-observe], [up-autosubmit] and [up-validate] as well as their programmatic variants up.observe() and up.autosubmit...
You have uncommited changes (you can always check by using git status), which you want to discard.
The robots.txt file and HTML tag can be used to control the behavior of search engine crawlers. Both have different...
For Rails models where only one of multiple attributes may be filled out at the same time, there is no...
Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak...
The linked content includes a few design patterns implemented with Ruby on Rails. What is the card indented to achieve...
You can use the code below to check whether the browser can make connections to the current site: await isOnline...
I recently wanted to add a model for address information but also wanted to add a unique index to those...
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...