Hello. I am Toyonaga from Rakuma. I continue to hit against the wall with competitive programming. When do you make a Unique constraint on a database? I had a conversation like this with my senior in the past. This is the scene where I was…

It seems better to have a Unique constraint on the database side when guaranteeing the uniqueness of data

Hello, My name is Zoe, a server side engineer in Rakuma. I like to polish my sneakers these days. This post is about Rails x puma-dev x puma server environment. The original motivation for this post is my laggy local Rails environment with…

rails x puma-dev x puma server environment

Hi, I am Toyonaga from Rakuma, so easy to get tan, by the way. Well, this is quite sudden, but have you heard the script “INSERT ... ON DUPLICATE KEY UPDATE” of MySQL? The script “INSERT, UPDATE” huge data at once. We were using the script…

This story is counter stop to use ON DUPLICATE KEY UPDATE with MySQL