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.

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.