Upgrade rails from 5.2 to 6.0

The main things to handle during upgrading API centric application’s rails version from 5.2 to 6.0 include configuration tuning and deprecation warnings fixing.

Upgrade to ruby 2.7.6

Ruby v2.7.6 is the latest version before v3.0 at the time of this writing and upgrading to v2.7.6 may encounter a breaking issue if the application uses libraries that depend on BigDecimal.

How to handle bigint in json stringify

As we know the BigInt type is availble in JavaScript as a data type able to represent any arbitrary large integer number, which is a good supplement when a value exceeds what number could represent. However, when working with applications where you need exchange data with JSON format, the bigint values become a problem because JSON does not know how to serialize bigint values by default, in such cases, one solution is to convert the bigint into string as this post shows.

Upgrade socket.io from v3 to v4

Following Upgrade socket.io from v2 to v3, this post is about upgrading socket.io and its associated packages to the latest versions as of when this post is written and the only setting changes seem to be from the redis-adapater and the way to import client io this time (for our specific use case).

Upgrade socket.io from v2 to v3

socket.io and its related libraries such as socket.io-redis-adapter and socket.io-redis-emitter had a few breaking changes in either functions or behaviors since v3 which might cause issues during the v2-to-v3 migration. This post lists what was encountered and how to solve it for specific use cases based on hands-on experience.

JS resources

Since I find myself writing code more and more in JavaScript nowadays regardless of backend or frontend development, I figure out I should at least give it a look seriously, the first time in more than 10 years, and here are the resources I find useful while diving into this long overlooked programming language.

How to protect files in linux with gpg

When working under shared linux machine or environment, sometimes it is necessary to hide or protect some files that contain sensitive information, fortunately there is a tool called GnuPG that most Linux distributions already have pre-installed and we can conveniently make use of this tool and this post is about how easy and quick we can use it for a very basic scenario.

Where is ruby defined? defined?

Ever wonder where ruby’s defined? is defined? Because it looks so like a method, you might end up trying to check out a bunch of places, such as: Object, Kernel, BasicObject, or even Class or Module, but only to find no luck locating it in any of such places. Well, only until you’ve realized it, the answer is pretty simple: defined? is not a method but an operator or a keyword.

Switch rails server from unicorn to puma

In rails apps among the commonly-used two popular web servers, unicorn serves requests with worker processes, while puma can do it with both process workers and threads. Therefore, switching to puma from unicorn can not only help improve concurrency but also reduce memory usage. Plus, since rails 5.0, the default web server used is puma.

Upgrade rails from 5.1 to 5.2

Upgrading application rails version from 5.1 to 5.2 is much easier than doing from 4.2 to 5.0 or from 5.0 to 5.1, there are very few changes to handle and chances are there is no test failure.