code:

Rails.application.config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins 'mysite.local', 'mysite.com', 'app.mysite.local', 'app.mysite.com'
    resource '*', headers: :any, methods: [:get, :post, :patch, :put, :delete], credentials: true
  end
end

code:

/(.*\.)?mysite\.com/

Ruby code:

class Person < ApplicationRecord
  has_many :person_organizations, dependent: :restrict_with_error

  has_many :organizations, through: :person_organizations

  scope :with_details, (lambda do
    includes(person_organizations: [:organization])
  end)
end

Ruby code:

Person.with_details.map { |p| puts p.organizations.map(&:external_reference_id) } # n+1 query  :(

Ruby code:

Person.joins(person_organizations: :organizations).select('organizations.external_reference_id')

code:

code:

# Schema: entries[ id, account_id, creator_id, created_at, updated_at, entryable_type, entryable_id ]
class Entry < ApplicationRecord
  belongs_to :account
  belongs_to :creator
  delegated_type :entryable, types: %w[ Message Comment ]
end

module Entryable
  extend ActiveSupport::Concern

  included do
    has_one :entry, as: :entryable, touch: true
  end
end

# Schema: messages[ id, subject, body ]
class Message < ApplicationRecord
  include Entryable
end

# Schema: comments[ id, content ]
class Comment < ApplicationRecord
  include Entryable
end

code:

<%= render "entries/entryables/#{entry.entryable_name}", entry: entry %>

code:

user.rb

has_many: :entries_users, class_name: 'EntriesUser'
has_many: :entries, through: :entries_users
has_many: :messages, through: :entries
has_many: :comments, through: :entries