kaspth

create_table :stowaway_records do |t|
  t.string :record_type,      null: false
  t.jsonb :record_attributes, null: false, default: {}
  t.timestamps
  t.index :record_type
end

class Stowaway::Record < ActiveRecord::Base
  def self.preserve(record)
    create! record_type: record.class, record_attributes: record.attributes

kaspth

donuts = accounts.create :kaspers_donuts, name: "Kasper's Donuts"

kasper   = users.create :kasper,   name: "Kasper",   accounts: [donuts]
coworker = users.create :coworker, name: "Coworker", accounts: [donuts]

menu = menus.create account: donuts
plain_donut     = menu_items.create menu: menu, name: "Plain",     price_cents: 10_00
sprinkled_donut = menu_items.create menu: menu, name: "Sprinkled", price_cents: 10_10

supporter = users.create name: "Super Supporter"

kaspth

Here's the second weekly recap!

In last weeks recap, I shared where we were at in code and it looked like this:

# test_helper.rb
Oaken::Data.load_from "test/seeds"

# test/seeds/users.rb
User = Struct.new(:name, keyword_init: true)

kaspth

class FormBuilder
  def text_field(method, **options)
    tag.input type: :text, **options_for(__method__, method, **options)
  end

  def options_for(type, method, index: @index, namespace: @options[:namespace], multiple: false, **options)
    Options.new(self, type, method, index:, namespace:, multiple:, **options)
  end

  class Options

kaspth

# Provide a BulletTrain::Theme::FormBuilder, with extensions to
# go between Rails standard form helpers and BulletTrain's themed versions seamlessly.

# With standard Rails:
# form_with model: Post.new do |form|
#   form.themed.text_field # Use BulletTrain theming on just one field
#
#   form.themed.fields do # Need a nested section of fields but themed?
#   end
# end

kaspth

class Object::Proxy < SimpleDelegator
  def initialize(object, **values)
    super(object)
    @values = values
  end

  def method_missing(name, ...)
    @values.fetch(name) { super }
  end
end

kaspth

class Developer
  has_object :search_scorer, after_save_commit: :rebuild_later # Forward callback onto context object.
end

# From my https://github.com/kaspth/active_record-associated_object gem.
# app/models/developer/search_scorer.rb
class Developer::SearchScorer < ActiveRecord::AssociatedObject
  performs :rebuild # Adds `rebuild_later` to automatically generate a job to run the scoring calculation in.
  def rebuild
    record.update! search_score: new_score

kaspth

class Invoice
  delivers_exposition # only: :create ?
  # ^ shorthand for this:
  after_create_commit  -> { Exposition.deliver_later "invoice.create", self }
  after_update_commit  -> { Exposition.deliver_later "invoice.update", self }
  after_destroy_commit -> { Exposition.deliver_later "invoice.destroy", self }
end

class Exposition < Data.define(:service, :event, :gid)
  def initialize(service: "invoices", **) = super

kaspth

# app/views/cards/_card.html.erb
# <%= greeting %>
#
# ^ gets compiled onto ActionView::Base as a Ruby method, when called like this:
#
#   render "cards/card", greeting: "Hello"
#
# Here's roughly what the compiled source looks like:
class ActionView::Base
  def render_card(local_assigns, output_buffer) # Not the actual method name, and the arguments change if using strict locals

kaspth

require "tsort"

module Rails
  module Initializable
    extend ActiveSupport::Concern

    def run_initializers(group = :default, *arguments)
      @ran ||= true.tap do
        Initializer.tsort(initializers).each { instance_exec(*arguments, &_1.block) if _1.in?(group) }
      end