Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
FormObject for building complex forms
Search
Dmytro Piliugin
November 30, 2013
Programming
2
100
FormObject for building complex forms
FormObject for building complex forms
Dmytro Piliugin
November 30, 2013
Tweet
Share
Other Decks in Programming
See All in Programming
ご注文の差分はこちらですか? 〜 AWS CDK のいろいろな差分検出と安全なデプロイ
konokenj
3
550
dbt民主化とLLMによる開発ブースト ~ AI Readyな分析サイクルを目指して ~
yoshyum
3
1.1k
PHP 8.4の新機能「プロパティフック」から学ぶオブジェクト指向設計とリスコフの置換原則
kentaroutakeda
2
1k
Rails Frontend Evolution: It Was a Setup All Along
skryukov
0
260
ISUCON研修おかわり会 講義スライド
arfes0e2b3c
1
460
効率的な開発手段として VRTを活用する
ishkawa
0
160
[SRE NEXT] 複雑なシステムにおけるUser Journey SLOの導入
yakenji
0
130
ニーリーにおけるプロダクトエンジニア
nealle
0
930
可変変数との向き合い方 $$変数名が踊り出す$$ / php conference Variable variables
gunji
0
150
スタートアップの急成長を支えるプラットフォームエンジニアリングと組織戦略
sutochin26
1
7.1k
Model Pollution
hschwentner
1
160
生成AI時代のコンポーネントライブラリの作り方
touyou
1
280
Featured
See All Featured
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
Embracing the Ebb and Flow
colly
86
4.8k
Making the Leap to Tech Lead
cromwellryan
134
9.4k
Navigating Team Friction
lara
187
15k
We Have a Design System, Now What?
morganepeng
53
7.7k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
830
Building a Modern Day E-commerce SEO Strategy
aleyda
42
7.4k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
22k
Testing 201, or: Great Expectations
jmmastey
43
7.6k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
A designer walks into a library…
pauljervisheath
207
24k
Transcript
FormObject for building complex forms Dmytro Piliugin @suaron dmytro.piliugin@gmail.com
MVC Model Controller View
MVC Model Controller View
MVC Model Controller View FromObject
None
None
None
1 class SignupsController < ApplicationController! 2 def new! 3 @signup_form
= SignUpForm.new! 4 end! 5 ! 6 def create! 7 @signup_form = SignUpForm.new(params)! 8 if @signup_form.save! 9 redirect_to home_path! 10 else! 11 render :new! 12 end! 13 end! 14 end
1 class SignUpForm! 2 include ActiveModel::Model! 3 ! 4 attr_reader
:user! 5 attr_reader :items! 6 ! 7 def initialize(params = {})! 8 @user = User.new(user_params(params))! 9 @items = build_items(items_params(params))! 10 end! 11 ! 12 def build_items(items_attributes)! 13 items_attributes.map do |attributes|! 14 Item.new(attributes)! 15 end! 16 end! 17 ! 18 def user_params(params)! 19 params.fetch(:user, {}).slice(:email).to_hash! 20 end! 21 ! 22 def items_params(params)! 23 params.fetch(:user, {}).fetch(:items, {}).values.map do |item_hash|! 24 item_hash.slice(:title).to_hash! 25 end! 26 end! 27 ! 28 end
1 class SignUpForm! 2 include ActiveModel::Model! 3! 4 ...! 5
! 6 def save! 7 valid? && persist! 8 end! 9 ! 10 validate :at_least_one_item_should_be_presence! 12 def at_least_one_item_should_be_presence! 13 if @items.empty?! 14 errors.add(:items, 'at least one should be present')! 14 end! 15 end! 16 ! 17 def valid?! 18 super! 19 @user.valid?! 20 @items.each(&:valid?)! 21 errors.empty? && @user.errors.empty? \! 22 && @items.all?{ |item| item.errors.empty? }! 23 end! 24 ! 25 ...! 26! 27 end
1 class SignUpForm! 2 include ActiveModel::Model! 3 ! 4 ...!
18 ! 19 def save! 20 valid? && persist! 21 end! 22 ! 23 ...! 34! 41 private! 42 def persist! 43 ActiveRecord::Base.transaction do! 44 company = Company.create!! 45 order = company.orders.create!! 46 ! 47 @user.company = company! 48 @user.save!! 49 ! 50 @items.each do |item|! 51 item.order = order! 52 item.save!! 53 end! 54 ! 55 return true! 56 end! 57 end! 58 ! 59 ...! 87! 88 end
41 private! 42 def persist! 43 ActiveRecord::Base.transaction do! 44 company
= Company.create!! 45 order = company.orders.create!! 46 ! 47 @user.company = company! 48 @user.save!! 49 ! 50 @items.each do |item|! 51 item.order = order! 52 item.save!! 53 end! 54 ! 55 AdminMailer.delay.notify(order.id)! 56 ! 57 return true! 58 end! 59 end
41 private! 42 def persist! 43 ActiveRecord::Base.transaction do! 44 company
= Company.create!! 45 order = company.orders.create!! 46 ! 47 @user.company = company! 48 @user.save!! 49 ! 50 @items.each do |item|! 51 item.order = order! 52 authorize_and_save(item)! 53 end! 54 ! 55 return true! 56 end! 57 end! 58 ! 59 def authorize_and_save(object)! 60 if current_ability.can?(:create, object)! 61 object.save!! 62 else! 63 errors.add(:security, "not authorised")! 64 raise ActiveRecord::Rollback! 65 end! 66 end
slides: https://speakerdeck.com/suaron/ formobject-for-building-complex-forms/ code: http://github.com/suaron/fo
References • http://railscasts.com/episodes/416-form-objects • http://matthewrobertson.org/blog/2012/09/20/ decoupling-rails-forms-from-the-database/ • http://robots.thoughtbot.com/activemodel-form- objects •
http://pivotallabs.com/form-backing-objects-for-fun- and-profit/
Q/A