ruby on rails

A web-app framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

https://rubyonrails.org/

Starky and Hutch sessions

2024-11-18

• side read Active record migration 📅 2024-11-18

Questions

2024-11-07

• side read Active record basics 📅 2024-11-07
• side kubetailrb reads logs from file 📅 2024-11-07 ✅ 2024-11-01

Questions

• PR: https://github.com/doctolib/doctolib/pull/183991/files
  • What is ->
  • It looks like a sugar syntactic for Proc
  • Read Ruby Blocks, Procs & Lambdas - The Ultimate Guide!.
• Inheritance with brackets [7.2]: Is it a class named with brackets?

class CreateBooks < ActiveRecord::Migration[7.2]

• Like an alias.

• see Dir[]

• Foo.new { |f| ... end } purpose compared to “classic” imperative approach?

book = Book.new do |b|
  b.title = "Metaprogramming Ruby 2"
  b.author = "Paolo Perrotta"
end
# vs
book = Book.new
book.title = "Metaprogramming Ruby 2"
book.author = "Paolo Perrota"

• It can be useful for constructor with mandatory arguments.
• It’s also more performant in some situations:

def foobar
  # A is memory hungry
  a = A.new
  # do something with a
 
  # long method...
end
# a is only release here
 
# VS
 
def foobar
  A.new do |a|
    # do something with a
  end
  # A will be released
 
  # long method...
end

2024-10-28 - ice breaker

• Session formats:
  • Duration: 1 hour per week, on Mondays, and we can shorten the session if it’s too long.
  • Read a section from Rails guides and check together in doctolib monolith code base to illustrate the principle.
    • Primary subjects to check out: model + controllers + active job
  • Also possible review together some code.
  • Progress status of the project kubetailrb.
    • This project will not highlight the features of rails’s ActiveRecord. Either find another project or find a way to use the ActiveRecord with kubetailrb.
  • Q&A

Questions

• Are the ruby exercises from uniq are relevant or not?
  • Teck Wan Wong doesn’t know as he didn’t do the tutorials on uniq.
• Does ruby on rails at doctolib differ a lot from the framework?
  • Tutorials on the internet can make me understand doctolib.
  • Use react + slim (for SEO) for frontend.
• Concurrency in ruby?
• We can install a gem with --user-install. What’s the difference without this flag? Is it useful if I’m using rbenv?
  • It should be most likely about precedence, i.e. ruby would take from the user installation directory before the installation directory.

Tips

• Use bundle open ${gem_name} to open the source code of the gem.

Resources

• Ruby on Rails Guides
• Ruby on Rails — The Rails Doctrine
• Ruby on Rails Tutorial | Learn Enough to Be Dangerous