Feature toggles are commonly used to while developing new feature in existing application. It’s best alternative to branch based development. Feature toggles can be stored along with application code or you can store them separately and use them across services and update them without deploying your application changes. …

Let’s assume a scenario where you continuously sync images from other application into your application and you dont have a way to identify if image is updated or not. Here now instead of simply updating image every time you can compare MD5 hash of those images to identify if image is updated or not. Example1: When your images are present on internet new_image_url = 'http://source.com/user/100/profile.jpg' existing_image_url = 'http://destination.com/user/100/profile.jpg' new_image_file = URI.parse(new_image_url).open existing_image_file = URI.parse(existing_image_url).open new_image_md5 = Digest::MD5.file(new_image_file.path).hexdigest existing_image_md5 = Digest::MD5.file(existing_image_file.path).hexdigest if new_image_md5 != existing_image_md5 user.update_profile(new_image_file) end

Modules are commonly used to to group constants holding possible attribute values. Like in the example below we have a Order class and it has attribute status. Status can hold different values as pending, confirmed, cancelled etc. class Order < ApplicationRecord module Status PENDING = 'Pending'…

Sometimes your application get overwhelmed with requests. These requests can block other users from accessing the application. To prevent this you can set a threshold on number of requests a user can make for any endpoint in given span of time. I am using rack-attack gem to active this. Add…

After completing my secondary schooling I moved to another city in August 2010. I never got chance to move back to my hometown until 2020 when pandemic began. I came back to my hometown in July 2020, almost after 10 years. I am staying here from last 6 months now…

Uniq vs. Uniq (Rails ActiveRecord 3.1) While using ActiveRecord for data operations it’s very important to write optimal queries to avoid multiple sql queries or loading unused data in memory which may impact performance of the application. Lets explore one of the such queries. Scenario - You have a user table having column email and you…

We all know benefits of logging. It enable developers to quickly troubleshoot issues even before reproducing it. These can be logs generated by framework, custom logs added by developers. In Production environment we have many app servers running behind the load balancer. Request can be processed by any server and…

We all know benefits of logging. It enable developers to quickly troubleshoot issues even before reproducing it. In distributed systems, computing logs are stored in shared drive or sometimes on distributed servers itself. …

Here we will be using RingCaptcha authentication api to send OTP from Rails application. With free trial account you will get 100 OTP sms balance. Follow below steps to get started! Create a new RingCaptcha account Visit RingCaptcha portal and create your free trial account using your email address and phone number. …