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# Service objects are classes that inherit from this base and implement two instance methods:
# * initialize(*args, **params) => void
# * perform() => Promise
class ServiceBase
  include ActiveModel::Validations
  
  # invokes the service and returns a Promise
  def self.perform(*args, **params)
    klass = params.any? ? new(*args, **params) : new(*args)
    klass.perform_in_transaction

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layout	title	description	tags
default	SQL Style Guide	A guide to writing clean, clear, and consistent SQL.	data process

Purpose

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require 'keyword_struct'

Mobiledoc = KeywordStruct.new(:version, :markups, :atoms, :cards, :sections) do
  Markup = Struct.new(:tag, :attrs)
  Atom = Struct.new(:name, :text, :payload)
  Card = Struct.new(:name, :payload)

  # Parses a serialized Mobiledoc into a collection of Ruby objects
  def self.parse(str)
    json = JSON.parse(str)

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/**
 * Mobiledoc 0.3.1
 * https://github.com/bustlelabs/mobiledoc-kit/blob/master/MOBILEDOC.md#specification
 */
interface Mobiledoc {
  version: '0.3.1';
  markups: Markup[];
  atoms: Atom[];
  cards: Card[];

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    # forgiveness is faster than permission
    private def catch_uniqueness_errors
      yield
    rescue ActiveRecord::RecordNotUnique => e
      field = e.cause.message.match(/index_([a-z_]*)_on_([a-z_]*)/)[2]
      raise unless field
      errors.add(field, :taken)
    end

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REPRO

1. click Group
2. DESYNC: notice that Group is unchecked and true

VARIATION: on change

1. modify template to bind the action on="change"
2. click Foo
3. notice that Group is checked and true

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Sidekiq Retries

Want to use Sidekiq's exponential backoff, but give up sooner? This table will help you pick a retry number.

class MyWorker
  ...
  sidekiq_options retry: N
  ...
end

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#!/usr/bin/env ruby

X = 'hello'

module A
  X = 'world'
end

module A::B
  def self.tst

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class QueueTimeMiddleware
  def initialize(app)
    @app = app
  end

  def call(env)
    if env['CONTENT_LENGTH'].to_i > 10000
      env['HTTP_X_QUEUE_START'] = nil
    end

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module Retriable
  # This will catch any exception and retry twice (three tries total):
  #   with_retries { ... }
  #
  # This will catch any exception and retry four times (five tries total):
  #   with_retries(:limit => 5) { ... }
  #
  # This will catch a specific exception and retry once (two tries total):
  #   with_retries(Some::Error, :limit => 2) { ... }
  #