You’ve probably written hundreds of Rails migrations by now. You’ve added columns, dropped tables, created indexes, and maybe even thrown in a few puts statements to track what’s happening during those migrations. But here’s something that might surprise […]
We’ve all been there: you’re testing a new feature, changing data, and suddenly realize you’re in production, affecting real users. At Unagi, after a few scares, we decided to implement a simple and reusable solution to […]
Notifications are everywhere in modern web applications. Users expect to be notified when someone comments on their post, shares their content, or invites them to collaborate in a post. But as your Rails application grows, managing […]
Let’s say we want to build a blog application that allows users to highlight text within articles and attach notes to those highlights. The idea is that when a user selects some text, a dialog appears […]
While it’s true that we already have an infinite scroll article at Unagi, some releases have happened since it was written regarding the amazing Pagy gem. The implementation is almost identical to our previous article, but the performance improvements […]
Imagine we’re building a web application to organize our personal trip albums. We could have a list of albums, and when you click on each album, a grid of photos would be displayed. The HTML layout […]
Let’s imagine we have a simple app called Turbo Video, where users can watch their favorite videos. The app is straightforward — it displays the video’s title, description, and a video player. Something like this: The code for […]
Let’s imagine we have a dashboard with important data for our business (e.g., number of active users, number of sales, server status). These numbers change over time, and we don’t want to reload the page to […]
Let’s imagine an app with a search page. This page displays some content unrelated to search and includes a form for users to search within the app. To avoid reloading the whole page, we decided to […]
There are many times when a user’s action requires updating a page without reloading it. In the past, this often meant writing custom JavaScript, but in Rails 7, it’s possible to use Hotwire and a bit […]
A veces, necesitamos responder a las requests direccionando a diferentes rutas según ciertas condiciones; como pueden ser, si el usuario está logueado o no, desde qué tipo de dispositivo está accediendo (desktop o mobile), o incluso […]
Eager loading es una técnica utilizada en Rails para cargar en memoria asociaciones de Active Record de manera anticipada, evitando el problema de N + 1 queries. Este problema ocurre cuando, al cargar una colección de […]
Rails nos ofrece validaciones básicas para poder controlar los valores que vamos a persistir en nuestra base de datos. Algunas de ellas son por ejemplo: uniqueness, presence, length, etc. Si en nuestro modelo Person tenemos 3 […]
In modern web applications, providing a smooth and responsive user experience is paramount. Infinite scrolling is a popular technique that loads content dynamically as the user scrolls, eliminating the need for traditional pagination controls. In this […]
If you use Ruby on Rails, you’ve probably had that moment of surprise when you realize Rails already provides a method that does exactly what you needed. But have you ever wondered what’s behind those methods? […]
In this article, we’re going to keep digging into the cool stuff that Turbo and Hotwire have to offer. This time we’re going to build a Planning Poker web application, enabling users to participate in estimation […]
You’ve finally decided to add RuboCop to your project. You add the gem, run the “rubocop” command for the first time, and get something like this: And now what?… What is an offense? What isn’t? Can you […]
When we have an object with a belongs_to relationship, we often use a select tag to list the data of the related entity. For example, we might have a select with all the available categories for a product […]
Every time I need information about a project, like the Rails/Ruby version, database adapter, RubyGems version, or JavaScript runtime, I start opening files and checking everything by hand 🫠. Today I learned there is a command […]
In any software development process, automated tests are key to boosting code quality. RSpec, my favorite testing framework 😍, offers various configuration options to customize test output. In this article, we’ll explore how to enhance the […]
Ruby on Rails includes a variety of built-in validation options. However, some advanced features, such as grouping conditional validations using with_options, may still be unfamiliar to many. In this article, we aim to shed light on this […]
Until recently, deploying a dockerized application seemed like a daunting task. Fortunately, this has changed thanks to Kamal, a tool specifically designed to streamline the deployment of web applications through a simple yet efficient workflow. At Unagi, we’ve […]
Avoid dealing with long and complex regular expressions to validate email addresses in your Ruby on Rails models. You can make your code cleaner and more straightforward by using URI::MailTo::EMAIL_REGEXP. The Custom RegEx Way While it’s possible […]
En el proyecto en el que trabajo a diario, comenzamos a recibir numerosas solicitudes falsas de la nada. Esto resultó en múltiples excepciones del tipo ActionController::RoutingError siendo logueadas en Rollbar (aplicación para trackeo de errores en tiempo real). Como consecuencia, […]
In Ruby on Rails app testing, accurate text matching is crucial for validating functionality, especially in system tests where you’re testing the app end-to-end. However, differences in whitespace formatting can cause unexpected failures, making tests fragile […]
Ruby on Rails offers a useful feature called Counter Cache that refers to a column in the database that keeps track of how many associated records a model has. It’s particularly useful in scenarios where we […]
ActiveSupport::StringInquirer is a cool class in Ruby on Rails that comes in handy to deal with strings as boolean-like objects. It’s great for making conditional logic simpler and improving our code readability. When you wrap a string […]
While Ruby on Rails comes with smart defaults that usually do the trick, there might be moments when you feel like customizing how the has_many association reference behaves. Thankfully, you can easily do this by passing some options, […]
Did you know Ruby on Rails provides a couple of parameters for rails routes that will maximize your productivity? Let’s see how it works. Grep through Rails Routes You can grep through Rails routes with the `-g` option, […]
Were you aware of template variants in Ruby on Rails? It’s an option that the method render provides and can be used in our controllers to deal with customized layouts or views. Let’s see how it works with […]
The pluck method in Ruby on Rails provides a way to directly fetch specific columns from the database, returning the result as an array. This means that instead of retrieving full ActiveRecord instances with all their associated data […]
Ruby on Rails and Active Record offer a powerful feature that can enhance the efficiency of your code — default scopes for has_many associations. However, with every great power comes great responsibility so be extremely cautious with default […]
Ruby on Rails offers a wide range of tools and modules to make application development more efficient and structured. One of these modules is ActiveSupport::Configurable, which provides an elegant approach to handling configurations in our classes. What […]
In the world of Ruby on Rails, we’ve got three cool methods for figuring out how big our collections are: “length,” “count,” and “size.” They each have their quirks, and knowing the scoop to keep your […]
Making sure that attribute values are consistent is really important for handling and getting data efficiently. In Rails 7.1, ActiveRecord introduced a great feature — attribute value normalization — that makes it easier to keep your data standardized across your […]
One of the things I like most about Hotwire is the ability to change the elements of different sessions through broadcasts. We could already do this with ActionCable and some JavaScript, but thanks to Hotwire, we […]
In this article, we’re going to learn how to create an image slideshow using Ruby on Rails, Hotwire, and Tailwind CSS. We’ll also sync the navigation between the images across multiple windows. Our goal is to […]
Estoy fascinado con el rumbo que está tomando la comunidad de Ruby on Rails. La incorporación de Turbo 8, Hotwire, Solid Cache, Js No Build, y esta idea del One Person Framework, demuestran un enfoque claro […]
Podemos encontrarnos con casos en nuestra aplicación de Rails en los que necesitamos excluir algunos conjuntos de registros al recuperar datos. En tales casos, podemos usar el método #excluding para filtrar los registros no deseados. El método #excluding llegó con […]
Las bases de datos relacionales contienen, como su nombre lo indica, datos que se relacionan entre sí. Estas relaciones pueden ser de distintos tipos (1:1, 1:N, N:N) y ActiveRecord nos permite definirlas a través de belongs_to, has_many, has_one y has_and_belongs_to_many. De […]
Te compartimos una forma sencilla de encontrar consultas lentas a la base de datos sin necesidad de instalar gemas extras. Para ello, vamos a usar Active Support Instrumentation API para que, cada vez que una consulta a nuestra […]
En este artículo te voy a contar cómo podríamos resolver de manera muy sencilla el manejo de subdominios en una aplicación Ruby on Rails. El problema Imaginemos que desarrollamos una aplicación de venta de libros de recetas de “Cómo […]
Cuando trabajamos en un modelo en Rails y necesitamos agregar una validación uniqueness con case insensitive, por lo general seguimos estos pasos: 2. Agregamos la validación uniqueness al modelo con la opción case_sensitive en false : Eso parece ser la […]
Muchas veces tenemos que realizar varias operaciones en la BD y queremos que esas operaciones se comporten como si fuesen una sola. Es decir, si falla una de esas operaciones, queremos que se deshagan todas. Para lograr […]
Ruby es un lenguaje de programación sumamente expresivo, lo que significa que resulta muy fácil de leer y comprender. Esto lo podemos encontrar en la forma de escribir las clases, de invocar los métodos y en los […]
En este artículo veremos cómo encriptar datos a nivel de aplicación con Active Record Encryption, una de las features incorporadas en Rails 7. Active Record Encryption sirve para proteger información sensible en nuestra aplicación, como datos de […]
Los health checks son comprobaciones que se realizan periódicamente para asegurarnos de que una o más partes de nuestra aplicación estén funcionando correctamente. Son una pieza clave para monitorear la salud de nuestra app, ya que sirven para […]
Una de las razones más comunes por las cuales una aplicación puede volverse lenta tiene que ver con las operaciones con la Base de Datos.Las consultas SQL pueden resultar muy costosas en términos de tiempos y […]
Por defecto, las rutas en Rails generan URLs utilizando los IDs de los registros de nuestra base de datos. Así, es común encontrar una URL como esta: Este formato de URL, donde se usa únicamente un […]
Si hay algo que debemos evitar al momento de realizar tests en nuestra aplicación, son las consultas a servicios externos. Uno se podría preguntar porqué, y la respuesta no es solo una, ya que realizar esto […]
¿Sabías que let y let! no son lo mismo? A simple vista pueden parecerlo, pero no lo son y en este artículo te voy a explicar las principales diferencias. La respuesta corta es que let carga el […]
En Unagi trabajamos con Ruby on Rails. Cuando se trata de migrar la base de datos, está todo claro: se crea una migración de esquema por cada tabla o modificación que queramos hacer, y cada una tiene su […]
Today we’re discussing Cache Stampedes in Ruby on Rails and how to prevent them using :race_condition_ttl. What is a Cache Stampede? Imagine we have many applications (or threads) that need the same information from our database. We […]
