marckohlbrugge

The Unofficial 37signals/DHH Rails Style Guide

About This Document

This style guide was generated by Claude Code through deep analysis of the Fizzy codebase - 37signals' open-source project management tool.

Why Fizzy matters: While 37signals has long advocated for "vanilla Rails" and opinionated software design, their production codebases (Basecamp, HEY, etc.) have historically been closed source. Fizzy changes that. For the first time, developers can study a real 37signals/DHH-style Rails application - not just blog posts and conference talks, but actual production code with all its patterns, trade-offs, and deliberate omissions.

How this was created: Claude Code analyzed the entire codebase - routes, controllers, models, concerns, views, JavaScript, CSS, tests, and configuration. The goal was to extract not just what patterns are used, but why - inferring philosophy from implementation choices.

AliOsm

KAMAL_REGISTRY_PASSWORD=dckr_pat_xXXxx_x0xXxXx-xX-XXX0xX0x-x
RAILS_MASTER_KEY=00x00xxx000xxx000000xx0x000x0x00
POSTGRES_PASSWORD=xXxxx0xXXx0
MEILI_MASTER_KEY=xXxxx0xXXx0
BLAZER_DATABASE_URL=postgres://service:{POSTGRES_PASSWORD}@service-name-postgres:5432/service_production

jjb

For years, people have been using jemalloc with ruby. There were various benchmarks and discussions. Legend had it that Jemalloc 5 didn't work as well as Jemalloc 3.

Then, one day, hope appeared on the horizon. @wjordan offered a config for Jemalloc 5.

Ubuntu/Debian

FROM ruby:3.1.2-bullseye
RUN apt-get update ; \

westonganger

module I18n
  class CustomExceptionHandler < ExceptionHandler
    def call(exception, locale, key, options)
      if exception.is_a?(MissingTranslation) && key.to_s != 'i18n.plural.rule'
        raise exception.to_exception
      else
        super
      end
    end
  end

lazaronixon

<%= form_with(model: billboard) do |form| %>
  <%= tag.div class: "dropzone", data: { controller: "dropzone", dropzone_param_name_value: "billboard[images][]", dropzone_url_value: rails_direct_uploads_url, dropzone_accepted_files_value: "image/*", dropzone_max_files_value: 3, dropzone_max_filesize_value: 0.300 } do %>
    <div class="dz-default dz-message flex flex-col items-center">
      <%= image_tag "upload.svg", size: 28, class: "colorize-black", aria: { hidden: true } %>
      <h5 class="font-semibold mbs-4">Drop files here or click to upload.</h5>
      <p class="text-sm text-subtle">Upload up to 10 files.</p>
    </div>
  <% end %>

  <div class="inline-flex items-center mbs-2 mie-1">

db0sch

If your master.key has been compromised, you might want to regenerate it.

No key regeneration feature at the moment. We have to do it manually.

1. Copy content of original credentials rails credentials:show somewhere temporarily.
2. Remove config/master.key and config/credentials.yml.enc
3. Run EDITOR=vim rails credentials:edit in the terminal: This command will create a new master.key and credentials.yml.enc if they do not exist.
4. Paste the original credentials you copied (step 1) in the new credentials file (and save + quit vim)
5. Add and Commit the file config/credentials.yml.enc

benhawker

Requisites:

• Create a free account at https://www.mailgun.com/
• Save your API Key as a environment variables: export MAILGUN_API_KEY=key-1111111111111111111111111

As example, I will use a model named Request.

chsh

#
# A:
# pubsub = PgPubSub.new('channelname')
# pubsub.subscribe do |data|
#  puts "data: #{data} is coming!"
# end
#
# B:
# pubsub = PgPubSub.new('channelname')
# pubsub.publish("hello world")

selenamarie

SQL for reporting queries

Datatypes: JSON, HLL

JSON

• http://www.postgresql.org/docs/9.3/static/functions-json.html