Ruby On Rails

Tutorials

Caution when using before_destroy with model association

Caution when using before_destroy with model association The other day, I was tasked with calling an external service when destroying a user. This kind of task is pretty straightforward in Rails, you call a method in a before_destroy callback on your model.

Postgres tips for Rails developers

Postgres tips for Rails developers This week at RailsConf, we found ourselves sharing a lot of tips for using PostgreSQL with Rails. We thought it might be worthwhile to write up many of these and share more broadly. Here you’ll find some tips that will help you in debugging and im...

The Fastest Way to Generate a Heap Dump on Heroku

The Fastest Way to Generate a Heap Dump on Heroku You’ve got an app with runaway memory use, what do you do hotshot? What do you do? If you’ve exausted the usual suspects it might be time to take drastic steps. It might be time to take a production heap dump. I previously wrote about doing this o...

Improving capistrano deployment performance

Improving capistrano deployment performance Measure itTons of shipments don't even have asset changes, so why bother compiling again when we can reuse the previously compiled assets? There's a gem for that! capistrano-faster-assets.

3 ways to do eager loading (preloading) in Rails 3

3 ways to do eager loading (preloading) in Rails 3 You are probably already familiar with the method #includes for eager loading data from database if you are using Rails and ActiveRecord. But do you know why you someties get few small and nice SQL queries and sometimes one giant query with every ...

Reliable notifications between two apps or microservices

Reliable notifications between two apps or microservices Let’s say you have 2 systems or microservices (or processes). And one of them needs to be notified when something happened in another one. You might believe it is not so hard unless you start thinking about networking, reliability, and consistency.

Conditionality is filtering. Don't filter control flow, filter data.

Conditionality is filtering. Don't filter control flow, filter data. A few weeks ago our client decided to change the URL structure of some of the most important pages. There were a few reasons to do it. They don’t matter so much right now. The business just decided to prioritize one kind of benefits over another k...

Using VueJS for Nested Forms in Rails: Part 1

Using VueJS for Nested Forms in Rails: Part 1 Learn how to use VueJS as an alternative to Cocoon and other methods of building dynamic nested forms with Rails.

How to Control Flow in Ruby Blocks

How to Control Flow in Ruby Blocks I recently found myself needing to return early from a block passed into a method in Ruby. Although the way to do this is fairly simple and obvious in hindsight, it seemed to surprise some of my Ruby-enthusiast colleagues. I decided to write this ...

Why Is Ruby Multithreading Slow?

Why Is Ruby Multithreading Slow? And I decided to run it with ruby 't.rb' instead of from within irb. Of course, I didn’t get what I expected — I got no output at all, and my program exited immediately. It didn’t take me long to figure out the problem — the main thread exiting be...

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