Let's say you have an application similar to Twitter where you have Users and Tweets and User 'has_many' tweets and Tweet 'belongs_to' user and you want to display how many Tweets a User has or how many people follow his Tweets. Typically, what you would do is query users and count their Tweets in by … Continue reading Rails counter cache
Have you ever wondered what the difference between 'and' and && operators is in Ruby? Check the example below. If you look at the line you might think that the user_name should be a String, but the error message clearly says that it is not a String, it's the Struct object. So how is this? … Continue reading Ruby “gotchas” – ‘and’ and &&
In the previous part I showed you how to create a cart, add products to it and how to keep products in user's cart so they can leave the session and come back at a later time and their products will still be in their cart. In this part I will show you how to … Continue reading Building a Shopping Cart in Ruby on Rails (Part 2)
I am learning how to keep my controllers clean as they grow while I develop. I am also trying to make my controllers handle only the HHTP-related stuff and move any other logic outside of it to make it read better and optimize it. As I understand it, a Service Object implements all kind of … Continue reading My first Service Objects in Ruby on Rails
This blog post covers basic concepts of testing Rails applications. After reading this post, you will know: Why we should write tests Testing 'philosophies' Types of tests How to write unit and integration tests for your application. Why do you test it all? The 4 things that we are looking for in tests are: Catching … Continue reading Testing Rails Applications
On my Ruby on Rails course I was tasked to build an e-commerce web application. In this post, I’ll cover creating a shopping cart that will keep track of products and their quantity and allow users to remove items. The full list of requirements was this: display a list of products to the client client can … Continue reading Building a Shopping Cart in Ruby on Rails (Part 1)
