Ruby On Rails

Tutorials

Ruby Infinity: How It Works

Ruby Infinity: How It Works What is infinity in Ruby?It’s something that has a starting point but no ending.In Ruby, we can express this concept of infinity with the Float::INFINITY constant.You may be wondering how this is useful.Let me explain with examples!.

Rails 6 adds support for Optimizer Hints

Rails 6 adds support for Optimizer Hints Many relational database management systems (RDBMS) have a query optimizer. The job of the query optimizer is to determine the most efficient and fast plan to execute a given SQL query. Query optimizer has to consider all possible query execution ...

Migrate tags in Rails to PostgreSQL array from ActsAsTaggableOn

Migrate tags in Rails to PostgreSQL array from ActsAsTaggableOn ActsAsTaggableOn is a swiss army knife solution if you need to add tags to your ActiveRecord model.Just by adding one gem to your Gemfile and acts_as_taggable to the model you get everything you need: adding tags, searching for a model by tag, get...

Launch: Autoscaling Sidekiq on Heroku

Launch: Autoscaling Sidekiq on Heroku “We have a very uneven Sidekiq workflow with a large number of jobs that get enqueued overnight. Rails Autoscale lets us get those jobs done quickly without paying for idle workers most of the day.” —Geoff, worker autoscaling beta userIt’s been my...

3 Defensive Programming Techniques for Rails

3 Defensive Programming Techniques for Rails Incidents happen all the time because of bad code deploys. You write some code that passes code review, it then is automatically shipped to production after a test suite passes, and BAM, an outage happens. This fairly common occurrence has ways to...

Algebraic effects for Ruby

Algebraic effects for Ruby Affect is a tiny Ruby gem providing a way to isolate and handle side-effects in functional programs. Affect implements algebraic effects in Ruby, but can also be used to implement patterns that are orthogonal to object-oriented programming, such a...

Six Ruby array methods you need to know

Six Ruby array methods you need to know Arrays are one of the fundamental structures of programming. Being able to quickly manipulate and read data out of them is vital to success in building stuff with computers. Here are six methods you can’t do without.

Cache large drop-downs in Rails

Cache large drop-downs in Rails Today I noticed that a couple of drop-downs in a key form were taking several seconds to load.At first I figured it's a slow query, because the drop-downs load data from the DB and there's several dozen records. But, no, queries take only a couple...

GraphQL Voyager for Rails

GraphQL Voyager for Rails It’s been almost a year now working and building with GraphQL backed APIs. One of the best things about GraphQL has always been their dev tooling.Firing up GraphiQL, and crafting a query on the fly has been amazing.But, one of the struggles I’ve f...

More than "Hello World" in Docker: Build Rails Sidekiq web apps in Docker

More than "Hello World" in Docker: Build Rails Sidekiq web apps in Docker There is no shortage of web tutorials on how to display "Hello World" in Docker. The problem is that the path from getting your app to say "Hello World" in Docker, to running production-grade applications in AWS, is often not as straightforward. E...

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