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...
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
tl;dr You should decouple migrations from models by embedding models into the migration. To use STI in this scenario...
ActiveType::Object inherits from ActiveRecod::Base and is designed to behave like an ActiveRecord Object, just without the database...
To allow HTTP 304 responses, Rails offers the fresh_when method for controllers. The most common way is to pass...
Greg Molnar has written a neat article about creating a single-file Rails app. This is not meant for production...
I recently wanted to add a model for address information but also wanted to add a unique index to those...
Imagine these models and associations: class Deck < ApplicationRecord has_many :cards end class Card < ApplicationRecord belongs_to :deck, optional: true...
There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...
tl;dr You can use attribute? as shorthanded version of attribute.present?, except for numeric attributes and associations. Technical Details
RSpec's let allows you to super into "outside" definitions, in parent contexts. Example: describe '#save' do subject { described_class.new(attributes...
Sometimes we write plain SQL queries in migrations so we don't have to mock ActiveRecord classes. These two migrations...
The usual way to build a relation in a ActiveSupport::Concern is this: module MyModule extend ActiveSupport::Concern
To attach files to your records, you will need a new database column representing the filename of the file...
CarrierWave comes with a set of default configuration options which make sense in most cases. However, you should review these...
When you repeat a subpattern with a *, + or {...} operator, you may choose between greedy, lazy and possessive modes. Switching modes...
Recently I made an upgrade from Bootstrap 3 to Bootstrap 4 in a bigger project. Here are some tips how...
When deploying a Rails application that is using Webpacker and Capistrano, there are a few configuration tweaks that optimize the...
Sometimes you want to find the inverse of an ActiveRecord scope. Depending on what you want to achieve, this is...
It sometimes happen that a database dump, that would want to insert into your development database, does not match the...
If a model inherits from others or uses many concerns / traits, it might be hard to see in the code...
When logging in Rails, you can use the log_tags configuration option to add extra information to each line, like...