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Rails is all about Convention over Configuration, this includes the DB primary key, which is always set to be id column. What if you want to use different column as your primary key? Read on and I’ll show you how. NOTE: This article is written for Rails 4.1.1 /w Postgres Usecase My webstore uses a special string ID, called sku, this ID is unique and queried instead of id column. For the sake of si

In this tutorial, I’ll walk you through the concept behind using puma + NGINX, plus thorough instructions on setting them up on CentOS and Ubuntu. Concept Many people who come from the old Apache HTTPd day often ask me how reverse proxy + web server work? “It’s different paradigm” Reverse proxy software (such as Varnish or NGINX) would acts as a load balancer that routes all external requests to a

Ever wondering why some tests passed locally but failed on Travis? Ever questioning how could I go about to debug why that failed test on remote Travis? Read on as I show you how UPDATE: The below solution no longer works with current Travis, I’ve contacted Josh and he advises to contact support@travisci.org and Travis would open a VM for you. In one occassion, I had a failed Ruby test on Travis w