Couldn't Find Handler For: puma, thin, falcon, webrick This morning, I was trying to learn Rack and how Rails uses it. So I created a new gem using the bundle gem command. Then
All the Database Tasks in Rails Once you start programming in Rails, you inevitably come across db:migrate, which applies the migration to your database. Then you make a mistake and
How to Drop a Table in Rails So you created a migration to add a table that you thought you were going to need. You also ran that migration so that table
How to Debug Ruby Code For a long time, I delayed learning Ruby as I didn’t know how to debug Ruby code. Coming from a .NET background, I was
How to Test Rails Source Code One of the best ways to understand any codebase is to read the tests, and Rails is no exception. In this post, we will learn
Include and Extend Here’s a neat trick I learned today. Typically, when a class includes a module, the module methods become instance methods on the including class.
Modifying Objects in Place Every time you create or copy something in memory, you add work for GC. Here are some tips from the book Ruby Performance Optimization to
Class Metaprogramming in Ruby A Ruby class definition is just regular code that runs. When you use the class keyword to create a class, you aren’t just dictating
How to Implement Callbacks in Ruby There are at least three places in Ruby where you can package code to be executed later. In a block, a proc/lambda, and a
A List of Middleware Used by Rails Here’s a list of middleware Rails uses in a development environment. You can view the middleware by running the bin/rails middleware command from
Caching in Rails These are the notes I took while reading the Rails caching guide. Caching is one of the most effective ways to boost an application’s
A Brief Introduction to Rake Rake is a task runner written in Ruby. It performs repetitive tasks, such as 1. Making database backup 2. Running tests 3. Watch for file
