Heroku | How it Works
Heroku's architecture enables deployment with nothing but Git. Deployment is fast, simple, and just works – all you do is push code to your repo on Heroku.
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How to Work With Time Zones in Rails
When dealing with time zones in Rails, there is one key fact to keep in mind:
Rails has configurable time zones, while
Ruby is always in the server's time zone
Thus, using Ruby's time API will give you wrong results for different...
3 ways to run Spring (the Rails app preloader) and how to disable it
spring ...
The most obvious way to use spring is to call it explicitly:
spring rails console
spring rake db:migrate
Binstubs
Binstubs are wrapper scripts around executables. In Rails they live inside bin/. If you...
Best practices: Writing a Rails script (and how to test it)
A Rails script lives in lib/scripts and is run with bin/rails runner lib/scripts/.... They are a simple tool to perform some one-time actions on your Rails application. A Rails script has a few advantages over pasting some prepared code into a R...
How to revert features for deployment, merge back, and how to stay sane
Removing features and merging those changes back can be painful. Here is how it worked for me.\
tl;dr: Before merging back: reinstate reverted features in a temporary branch, then me...
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
How to upgrade Rails: Workflow advice
When upgrading Rails versions -- especially major versions -- you will run into a lot of unique issues, depending on the exact version, and depending on your app.
However, it is still possible to give some generic advice on how you want to tackle...
How to make your application assets cachable in Rails
Note: Modern Rails has two build pipelines, the asset pipeline (or "Sprockets") and Webpacker. The principles below apply for both, but the examples shown are for Sprockets.
Every page in your application uses many assets, su...
How Rails and MySQL are handling time zones
When working with times and dates in Rails applications, you need to deal with the following problem:
- In Rails,
Timeobjects have a time zone. You can get the zone name by doingtime_object.zone. - This zone is considered when doing time ca...
How to negate scope conditions in Rails
Sometimes you want to find the inverse of an ActiveRecord scope. Depending on what you want to achieve, this is quite easy with Rails 7, and a bit more complicated with Rails 6 and below, or when the inverse scope may contain NULL values. [1]
The...