Little programming joys

Crystal, TDD and Conway’s Game of Life.

How I learned a new programming language having fun and using tests.

Writing Command APIs in Ruby — Part 3

Command validation and responses

Introduction

Writing Command APIs in Ruby — Part 1

How to setup a new command application

Using helper methods inside your controllers

Have you ever needed to use a helper method inside your controller? I did, a few…

Ordering by nulls on Postgres

By default Postgres will order by ASC and NULL values will be placed on the end of list, but with the NULLS {FIRST|LAST} option you can setup the ordering by NULL values as you wish:

Writing Slack Command APIs in Ruby — Part 4

Sending direct messages via Chat API

The Postgres RETURNING clause

How to return data related to updated rows.

The problem

Here is my situation. I have a products table and each product needs to be approved by someone.

The initial solution

Less is good.

Learning how to embrace constraints.