codesnips

service-object

ruby 
class SignupForm
  include ActiveModel::Model
  include ActiveModel::Attributes

  attribute :account_name, :string
  attribute :email, :string

Shallow Controller, Deep Params: Form Object Pattern

rails activemodel form-object
by codesnips 3 tabs
ruby 
module Retryable
  module_function

  def with_retries(tries: 3, base: 0.3, cap: 5.0, on: [StandardError])
    attempt = 0
    begin

Retry a Flaky HTTP Call with Exponential Backoff Using a Rails Service Object

rails http retries
by codesnips 3 tabs
ruby 
class OrderCreationService
  Result = Struct.new(:success?, :order, :error, keyword_init: true)

  def initialize(customer:, line_params:)
    @customer = customer
    @line_params = line_params

Transactional Order Creation With Nested Savepoints in Rails

rails activerecord postgres
by codesnips 3 tabs
ruby 
class ImportResult
  RowError = Struct.new(:line, :messages)

  attr_reader :imported, :row_errors

  def initialize

Streaming CSV Product Import With Per-Row Validation and Error Reporting in Rails

rails csv service-object
by codesnips 3 tabs
ruby 
class PriceBreakdown < Struct.new(:subtotal_cents, :discount_cents, :tax_cents, keyword_init: true)
  def initialize(*)
    super
    freeze
  end

Memoizing a Pricing Breakdown as an Immutable Value Object in Rails

rails memoization value-object
by codesnips 3 tabs
ruby 
require "csv"

class ProductImporter
  BATCH_SIZE = 500

  attr_reader :errors, :inserted

Bulk-Insert a Product CSV in Rails with a Service Object and upsert_all

rails csv bulk-insert
by codesnips 3 tabs
ruby 
class Cart < ApplicationRecord
  belongs_to :user, optional: true
  has_many :cart_items, dependent: :destroy

  scope :for_session, ->(token) { where(session_token: token) }
  scope :active, -> { where(merged_at: nil) }

Merge a Guest Cart Into a User's Cart on Login With a Rails Service Object

rails service-object devise
by codesnips 3 tabs