Kolosek | Ruby on Rails development company

Nesha Z.

Rails Associations

Rails Associations

An association is a connection between two Active Record models. It makes much easier to perform various operations on the records in your code. We will divide associations into four categories: 1. One to One 2. One to Many 3. Many to Many 4. Polymorphic One to Many If you

Testing GraphQL Server in NodeJS

Testing GraphQL Server in NodeJS

When we started using GraphQL in our NodeJS project [https://kolosek.com/sails-graphql-guide/], we had a struggle with writing tests: we read numerous blogs, searching for the best way. Unfortunately, there didn't seem to be one, so we made one ourselves and here we'll share our way of testing GraphQL

Anatomy of Sails.js API with GraphQL

Anatomy of Sails.js API with GraphQL

If you're having troubles with organizing API for the Node.js [https://kolosek.com/learn-about-node] app, using the Sails.js [https://sailsjs.com/] framework with the GraphQL [http://graphql.org/graphql-js/], know that you're not the only one - we've been there too. Since this is not an every-day combination

Git Branches

Several developers contribute to the same source code, and while some will be fixing bugs the others would be implementing new and different features. The problem raises, how to maintain different versions of the same code base? This is where the branch function shines!

Rails 5 Change Database Column

Rails 5 Change Database Column

While working on a Rails application, we all have had to change the database column in some way. You can change the column name and the column type, as well as changing the column with the type conversion. Changing the Column Name Before we can change a column, we have

Git Commands Tutorial - Part 2

Git Commands Tutorial - Part 2

In the last Git Commands article, we have learned how to use Git options and what they can do. Today, we will extend our reach and discover everything there is to know about commonly used Git Commands.

Git Commands Tutorial - Part 1

Git Commands Tutorial - Part 1

There are many different ways to use Git. The most common are the original command line tools and GUI (Graphical User Interfaces). Here, we will cover the most important commands you should know about when you are working with Git.

Rails Debugging

Rails Debugging

Even the best Rails developers in the world have to debug their code from time to time. Unlike other frameworks, Rails makes it easy to debug your code, so you can limit your downtime and get your applications up and running. Debugging has never been easier!

Rails respond_to block Explained

Rails respond_to block Explained

When you start your first Rails application you might think that controller actions are only capable of rendering HTML. So why and how to use a respond_to block? Here, we will show you how handy respond_to blocks can be. respond_to The first step is to create a

RSpec Rails Controller Test

RSpec Rails Controller Test

Rails is a web development framework, where model, view and controller are important aspects of your application. Controllers, just like models and viewers, need to be tested with Ruby communities favorite tool, RSpec. Controllers in Rails accept HTTP requests as their input and deliver back and HTTP response as an

React JSX - How to do it the right way - Part II

React JSX - How to do it the right way - Part II

In the previous part of React JSX series [https://www.kolosek.com/react-jsx-loops/], we took a look at how to correctly loop through arrays and objects in React. In this article, we'll help you learn how to write conditional statements when rendering components. Everything below applies to React Native as

React JSX - How to do it the right way - Part I

React JSX - How to do it the right way - Part I

Usually, when developing a website, you'll need some dynamical rendering, like a listing of items, showing some element under a certain condition and so on. You're all aware of the standard JS syntax - a for loop, or an if/else - but when you try to write those under

Rails Join Table Ultimate Tutorial

Rails Join Table Ultimate Tutorial

This is a complete tutorial for creating join table in Ruby on Rails. It will show how to generate and create a join table and how to address associations between different models. It will also show you how to write a form with multiple select boxes and how to handle

Update Firefox on Ubuntu

Update Firefox on Ubuntu

There is an easy way to update Firefox and there is a little bit more complex way to do it. We'll cover both of them. Easy way to update Firefox sudo apt-get update sudo apt-get install firefox And voila! You are done. Easy, wasn't it? If it wasn't it and

Healthcare Startups

Healthcare Startups

The revolution of the tech era had to undoubtedly bring changes in the field of medicine. Whether we like it or not, we are constantly attached to our digital devices, smartphones, tablets… And whether we like it or not, we all at some time need medical help. So, why wouldn’

CarrierWave Upload Multiple Images [2018 Update]

CarrierWave Upload Multiple Images [2018 Update]

When you are building a web application, you definitely want to add an option for image uploading as well. In this tutorial, we will show you the necessary steps to enable upload multiple images/files using CarrierWave in Rails 4+ from scratch. A similar procedure can be applied for nested