SOLID is a popular group of design principles and if you are a developer, for sure you had contact with it.

It is must if you want to get a nice job, but still many programmers have a problem to deal with this in 100%.

This is my explanation what is SOLID about in Ruby ecosystem.

Accessors can be hard to understand for new developers. 

In this article i will try to explain how they work and when to use them.

In simple words CQRS is dividing the reading part of the model from the writing part.

Instead of one, we have 2 models with different responsibilities.

Value Object is quite popular design pattern, but it can be messy to implement it well.

This is my implementation of value objects. 

Sometimes raising error is not enough. As probably you know, you can use command like this:

raise ActiveModel::StrictValidationFailed, "Some message"

This command will return 500 error on your website + it will log into your console the name of the error and message you passed in.

But it won't give you any context. This is big problem if for example you call API and your response is bad.
You want to know, what is happening there directly.

Fortunately there is some solution for it.

Today i've suffered some issue with a SSH key. I've tried to clone my repository from Gitlab.com.

Unfortunately i've received an error:

Permission denied (publickey,keyboard-interactive)

I've thought, i have problem with a SSH key. Unfortunately, adding a SSH key did not resolve the problem.

How to resolve it?