Imagine that you are implementing a payment processing system for the e-commerce system and discover that multiple customers were charged twice for exactly the same order. Ouch… Sounds like a real nightmare to deal wi... Read on →
In the typical Rails application, you can find the most of the validations in the ActiveRecord models, which is nothing surprising - ActiveRecord models are used for multiple things. Whether it is a good thing, or a b... Read on →
Adding consents for accepting Terms of Service/Privacy Policies must have been a top popular feature in the majority of the applications due to enforcement of GDPR in May ;). From the technical aspects that GDPR requi... Read on →
Few months ago I wrote a blog post about ActiveRecord before_validation callback and how it is used for wrong reasons and concluded that in most cases this is not something we should be using routinely. However, I mi... Read on →
Touching ActiveRecord models is quite a common thing in most of the Rails applications, especially useful for cache invalidation. By default, it updates updated_at timestamp with the current time, Here’s a typical exa... Read on →
Imagine that you are implementing an e-commerce platform and want to grab all orders from the current year. What would be the simplest way of doing it in Rails? Probably writing a query looking like this: Read on →
It’s nothing new that ActiveRecord callbacks are abused in many projects and used for the wrong reasons for many use cases where they can be easily avoided in favor of a much better alternative, like service objects. ... Read on →
Rails 5.0 is without a doubt a great release with plenty of useful changes and additions. The most notable change was probably ActionCable - the layer responsible for integrating your app with websockets. However, the... Read on →
Soft delete is a pretty common feature in most of the applications. It may increase complexity of the queries, nevertheless, not deleting anything might be a right default as the data might prove to be useful in the f... Read on →
Is validation in your models or form objects enough to ensure integrity of the data? Well, seems like you can't really persist a record when the data is not valid unless you intentionally try to bypass validation usin... Read on →
Ordering with ActiveRecord and PostgreSQL may seem like an obvious and simple thing: in most cases you just specify one or several criteria with direction of ordering like order(name: :asc) and that's all, maybe in mo... Read on →