Ruby On Rails

Tutorials

Rails 6 adds delete_by and destroy_by methods.

Rails 6 adds delete_by and destroy_by methods. Rails has provided methods like find_by, find_or_initialize_by, and find_or_create_by to fetch, initialize, and create record respectivley, based on the passed conditions.Similar method to delete or destroy record(s) was missing in Rails.As per th...

Exploring Linux File Locking Mechanisms in Ruby | λ Lambda Papers

Exploring Linux File Locking Mechanisms in Ruby | λ Lambda Papers An exploration of File Locking mechanisms and their pitfalls on Linux in Ruby.On a recent automation spree I produced a couple of hundred lines of ruby that needed persistence. The built-in PStore is a natural choice for a project that size. I’ve ...

How to Make Colors With Ruby and Bitwise Operations

How to Make Colors With Ruby and Bitwise Operations Leverage softPwn on the Raspberry Pi to control a mutli-colored LED with Ruby hexadecimal primitives, and some bitwise operations.The RGB LED I'm working with has four pins. Three of these pins take input that control the brightness level for (R)...

Let's hash this out.

Let's hash this out. How hashes have changed in the last few versions of Rails, and how you can handle them to minimize the pain of your next upgrade.Ruby hashes are wonderfully versatile. You can store any kind of object using any kind of key and do all sorts of wack...

Getting Started with AWS S3 IAM Policies Security Config for Rails Apps

Getting Started with AWS S3 IAM Policies Security Config for Rails Apps Storing files on S3 is for many developers, the first contact with AWS cloud. Unfortunately, the “quick and easy” configuration can be insecure. If you are uploading files to an S3 bucket but never configured a custom AWS IAM policy it’s possible ...

How MJIT Generates C From Ruby - A Deep Dive

How MJIT Generates C From Ruby - A Deep Dive I’ll give you the short version here: Ruby parses your code. It turns it into an Abstract Syntax Tree, which is just a tree-data-structure version of the operations you asked it to do. Before Ruby 1.9, Ruby would directly interpret the tree struct...

Debugging hidden memory leaks in Ruby

Debugging hidden memory leaks in Ruby In 2015 I wrote about some of the tooling Ruby provides for diagnosing managed memory leaks. The article mostly focused on the easy managed leaks.This article covers tools and tricks you can use to attack leaks that you can not easily introspect i...

Action Cable for Rails API

Action Cable for Rails API Rails 5 introduced us to action cable that is a web socket for rails.ActionCable can be used for chats, synced editing app, or real-time app notifications.When creating a new rails API or app, action cable comes builtin the app.There are many arti...

Cross domain session sharing in Rails - Part 1

Cross domain session sharing in Rails - Part 1 We have multiple micro services at Memory.ai which talk to each other and share data. As we are extracting more and more micro services, we were facing the problem of adding authentication layer in every service. In an ideal world, only one servic...

Three Awesome Libraries to Assess Code Quality in Ruby

Three Awesome Libraries to Assess Code Quality in Ruby As part of our Rails upgrade business we get to evaluate a lot of codebases every month. We usually need a quick way to assess the quality of the code we get. For this we like to use CodeClimate and SimpleCov.CodeClimate is free for open source pr...

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