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Ϩʔϧͷ৳͠ํ
!XJMMOFU
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3BJMT%FWFMPQFST
.FFUVQ
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No content
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$MFBO5FTU$PEF
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No content
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IUUQTXJMMOFUHJUCPPLTJPSTQFDTUZMFHVJEF
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ӳޠ൛͋Γ·͢
5IBOLT!HB[BZBT
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*❤$MFBO
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Shinichi Maeshima
!
"
#
@netwillnet
@willnet
http://blog.willnet.in
Rails Consultant
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8FBSFOPUIJSJOH
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͔͜͜Βຊ
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8PSLJOHXJUI3BJMT
XIJMFGFFMJOHTUSFTT
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։ൃॳظ
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։ൃதظ
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։ൃޙظ
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Ͳ͏ͨ͠ΒͭΒ͘ͳ͍͔
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దͳநԽ
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దͳநԽ
Կͯ͠Δͷ͔ͻͱͰ
͔ΔΑ͏ʹ͢Δ
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దͳநԽͷྫ CFGPSF
class Registration
def save
ApplicationRecord.transaction do
case @auth_hash[:provider]
when 'twitter' then register_by_twitter!
when 'facebook' then register_by_facebook!
when 'github' then register_by_github!
end
Friendship.create!(user: invitation.sender, friend: user)
Friendship.create!(user: user, friend: invitation.sender)
invitation.joined_at = Time.zone.now
invitation.receiver = user
invitation.save!
end
true
rescue ActiveRecord::RecordInvalid
false
end
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దͳநԽͷྫ BGUFS
class Registration
def save
ApplicationRecord.transaction do
register!
make_friends!
finish_invite!
end
true
rescue ActiveRecord::RecordInvalid
false
end
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దͳநԽ
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దͰͳ͍நԽͷྫ
class IssuesController < ApplicationController
before_filter :find_issue, :only => [:show, :edit, :update]
before_filter :find_issues, :only => [:bulk_edit, :bulk_update, :destroy]
before_filter :find_project, :only => [:new, :create, :update_form]
before_filter :authorize, :except => [:index]
before_filter :find_optional_project, :only => [:index]
before_filter :check_for_default_issue_status, :only => [:new, :create]
before_filter :build_new_issue_from_params, :only => [:new, :create, :update_form]
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3BJMT.7$
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3BJMTͷ.7$ʹ͓͚Δ՝
w.7$ɺਖ਼͔ͭ͑ͯ͘͠·͔͢ʁ
w.7$͚ͩͰϨΠϠΓͳ͍ͷͰʁ
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$POUSPMMFSΛਖ਼͘͠͏
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ѱ͍ྫ 'BU$POUSPMMFS
IUUQTHJUIVCDPNTIBLBDPEFGBUDPEFSFGBDUPSJOHUFDIOJRVFT
def create
@micropost = Micropost.new(micropost_params.merge(user: current_user))
if current_user.minor? && (profane_words_used = profane_words_in(@micropost.content))
current_user.increment(:profanity_count, profane_words_used.size)
current_user.save(validate: false)
send_parent_notifcation_of_profanity(profane_words_used)
flash.now[:error] = <<-MSG.html_safe
Profanity: '#{profane_words_used.join(", ")}' not allowed! You've tried to use profanity #{view_context.pluralize(current_user.profanity_count, "time")}!
Your parents have been notified!
MSG render 'static_pages/home' else if @micropost.save flash[:success] = "Micropost created!" redirect_to root_url else render 'static_pages/home' end end end endSlide 27
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'BU$POUSPMMFS㲈దͳ
நԽ͕Ͱ͖͍ͯͳ͍
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मਖ਼ޙ
def create
@micropost = Micropost.new(micropost_params.merge(user: current_user))
if @micropost.save_with_profanity_callbacks
flash[:success] = "Micropost created!"
redirect_to root_url
else
adjust_micropost_profanity_message
render 'static_pages/home'
end
end
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$POUSPMMFSͷ
w ϞσϧͷϝιουΛݺͿ
w Πϯελϯεมͷೖ
w Ϗϡʔͷબ ͘͠ϦμΠϨΫτઌͷબ
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ϩδοΫͷͯ͢Λ
ϞσϧʹͤΔؾ࣋ͪͰ
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class UsersController < ApplicationController
def create
@user = User.new(user_params)
if @user.save
UserMailer.thanks(@user).deliver_later
redirect_to @user, notice: '登録完了しました'
else
render :new
end
end
͜ͷ͘Β͍ڐ༰
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ͺͬͱݟ͔ͯΔൣғͳΒ
ίϯτϩʔϥʹॻ͍ͯେৎ
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.PEFMΛਖ਼͘͠͏
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࠶ܝ
ϩδοΫͷͯ͢Λ
ϞσϧʹͤΔؾ࣋ͪͰ
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ϩδοΫͷͯ͢Λ
ϞσϧʹͤΔ
'BU.PEFM
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'BU.PEFMͷԿ͕ྑ͘ͳ͍ͷ
w େͷ߹ɺϞσϧಉ͕࢜ີ݁߹ʹͳ͍ͬͯΔ
w ີ݁߹मਖ਼͕࿈͍͢͠
w "ΫϥεͷϝιουΛमਖ਼ͨ͠Β#Ϋϥεͷमਖ਼͕ඞཁ
ʹͳͬͯɺͦΕΛमਖ਼ͨ͠Β$Ϋϥεͷमਖ਼͕ʜ
w ˠόάͷݪҼʹͳΓ͍͢
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'BU.PEFMͷྫ
class User < ApplicationRecord
has_many :posts
has_many :friendships
has_many :friends, through: :friendships
def create_post_with_notifications!(body)
transaction do
posts.create!(body: body)
friends.each do |friend|
friend.notifications.create!("#{name}さんが投稿しました")
end
end
end
# 大量の似たようなメソッド
end
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ղܾࡦ
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1030ʹΓग़͢
class PostWithNotifications
def self.create!(creator:, body:)
new(creator: creator, body: body).create!
end
def initialize(creator:, body:)
@creator = creator
@body = body
end
def create!
ActiveRecord::Base.transaction do
create_post!
create_notifications!
end
end
private
attr_reader :creator, :body
def create_post!
creator.posts.create!(body: body)
end
def create_notifications!
creator.friends.each { |friend|
create_notification!(friend)
}
end
def create_notification!(friend)
friend.notifications.create!(
“#{creator.name}さんが投稿しました"
)
end
end
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IUUQUFDINFEQFFSDPKQFOUSZ
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7JFXΛਖ਼͘͠͏
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7JFXʹ
େ͖͍՝ͳ͍ ͣ
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͜͜·Ͱͷ·ͱΊ
w ϩδοΫΛϞσϧʹدͤΔ
w 1030 "DUJWF3FDPSEҎ֎ͷϞσϧ
Λ׆༻͢Δ
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͜Ε͚ͩͰฏۉҎ্
ͷՄಡੑ ࣾൺ
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͔࣍͠͠ͷΑ͏ͳέʔεͰ
·ͩࠔΔ
w େྔͷCFGPSF@pMUFS
w WBMJEBUJPODBMMCBDLͷ߹͚
w ͻͱͭͷΞΫγϣϯͰͨ͘͞ΜΔ͜ͱ͕͋Δ
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େྔͷCFGPSF@pMUFS
class IssuesController < ApplicationController
before_filter :find_issue, :only => [:show, :edit, :update]
before_filter :find_issues, :only => [:bulk_edit, :bulk_update, :destroy]
before_filter :find_project, :only => [:new, :create, :update_form]
before_filter :authorize, :except => [:index]
before_filter :find_optional_project, :only => [:index]
before_filter :check_for_default_issue_status, :only => [:new, :create]
before_filter :build_new_issue_from_params, :only => [:new, :create, :update_form]
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CFGPSF@pMUFS͕ଟ͍ͱ
Կ͕͔
w ͕ࣗؾʹ͍ͯ͠ΔίϯςΩετ ΞΫγϣϯ
Ͱͳ
ʹ͕࣮ߦ͞Ε͍ͯΔͷ͔͕Θ͔ΓͮΒ͍
w ࠷ऴతʹͲΜͳΠϯελϯεม͕ઃఆ͞Ε͍ͯΔ
ͷ͔Θ͔ΓͮΒ͍
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આ໌༻ͷͬͱ؆୯ͳྫ
class PostsController < ApplicationController
before_filter :set_posts, only: :index
before_filter :set_post, only: :show
before_filter :set_recommendations
def index
end
def show
end
private
def set_posts
@posts = post.page(params[:page).per(10)
end
def set_post
@post = post.find(params[:id])
end
def set_recommendations
@recommendation_categories = Category.recommendations
@recommendations = @recommendation_categories.posts
end
end
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CFGPSF@pMUFSBDUJPO
class PostsController < ApplicationController
def index
set_recommendations
set_posts
end
def show
set_recommendations
set_post
end
private
def set_posts
@posts = post.page(params[:page).per(10)
end
def set_post
@post = post.find(params[:id])
end
def set_recommendations
@recommendation_categories = Category.recommendations
@recommendations = Recommendations.new(@recommendation_categories)
end
end
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w ͕ࣗؾʹ͍ͯ͠ΔίϯςΩετ ΞΫγϣϯ
Ͱͳʹ͕࣮ߦ
͞Ε͍ͯΔͷ͔͕Θ͔ΓͮΒ͍ˠ
w ࠷ऴతʹͲΜͳΠϯελϯεม͕ઃఆ͞Ε͍ͯΔͷ͔Θ
͔ΓͮΒ͍ˠ
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ΫΤϦϝιουԽ
class PostsController < ApplicationController
def index
@recommendation_categories = fetch_recommendation_categories
@recommendations = fetch_recommendations(@recommendation_categories)
@posts = fetch_posts
end
def show
@recommendation_categories = fetch_recommendation_categories
@recommendations = fetch_recommendations(@recommendation_categories)
@post = fetch_post
end
private
def fetch_posts
post.page(params[:page).per(10)
end
def fetch_post
post.find(params[:id])
end
def fetch_recommendation_categories
Category.recommendations
end
def fetch_recommendations(categories)
Recommenadtions.new(categories)
end
end
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w ͕ࣗؾʹ͍ͯ͠ΔίϯςΩετ ΞΫγϣϯ
Ͱͳʹ͕࣮ߦ
͞Ε͍ͯΔͷ͔͕Θ͔ΓͮΒ͍ˠ
w ࠷ऴతʹͲΜͳΠϯελϯεม͕ઃఆ͞Ε͍ͯΔͷ͔Θ
͔ΓͮΒ͍ˠ
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Ұݟͳͦ͞͏ʹ
ݟ͑Δ
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Πϯελϯεม͕ଟ͍ͱʜ
class PostsController < ApplicationController
def index
@recommendation_categories = fetch_recommendation_categories
@recommendations = fetch_recommendations(@recommendation_categories)
@posts = fetch_posts
@ad = fetch_ad
@widget = fetch_widget
@sidebar = fetch_sidebar
@title = fetch_title
@cart = current_cart
@search = build_search_form
end
def show
# indexと同じようにたくさんのインスタンス変数への代入がある
end
private
# たくさんのプライベートメソッド
end
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Πϯελϯεม͕ଟ͍ͱʜ
w ϓϥΠϕʔτϝιου͕ଟ͘ͳΓݟ௨͕͠ѱ͘ͳΔ
w ˢΛϞσϧҠ͢ͱଟগ؇͞ΕΔ
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Ϗϡʔʹ͢ΦϒδΣΫτ͕
ଟ͍ͱݟͮΒ͍
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ղܾࡦ
ʮϏϡʔʹ͢มΛநԽʯ
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7JFX.PEFM 7JFX0CKFDU
class PostsController < ApplicationController
def index
@view_model = PostIndexViewModel.new
end
end
class PostIndexViewModel
def posts
@posts ||= Post.page(params[:page).per(10)
end
def recommendation_categories
@recommendation_categories ||= Category.recommendations
end
def recommendations
@recommendations ||= recommendation_categories.posts
end
end
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7BMJEBUJPO DBMMCBDL
ͷ
߹͚
class Post < ApplicationRecord
validates :body, presence: true, length: { maximum: 1000 }
validates :published_at, presence: true
validate :publish_at_should_after_current, unless: :by_admin
attr_reader :by_admin
def update_by_admin(attrs)
@by_admin = true
update(attrs)
end
def publish_at_should_after_current
return unless publish_at
return if publish_at > Time.zone.now
errors.add(:publish_at, 'は現在時刻より後にしてください')
end
end
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దͳநԽ
Կͯ͠Δͷ͔ͻͱͰ
͔ΔΑ͏ʹ͢Δ
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Կͯ͠Δͷ͔ͻͱͰ
͔ΔΑ͏ʹ͢Δ
߹͚
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ղܾࡦ
ϑΥʔϜ͝ͱʹΫϥεΛ࡞Δ
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'PS̼0CKFDU
class PostForm
include ActiveModel::Model
attr_accessor :post, :body, :publish_at
validates :body, presence: true, length: { maximum: 1000 }
validates :publish_at, presence: true
validate :publish_at_should_after_current
def save
post.attributes = { body: body, publish_at: publish_at }
post.save if valid?
end
private
def publish_at_should_after_current
return unless publish_at
return if publish_at > Time.zone.now
errors.add(:publish_at, 'は現在時刻より後にしてください')
end
end
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'PS̼0CKFDU
class AdminPostForm
include ActiveModel::Model
attr_accessor :post, :body, :publish_at
validates :body, presence: true, length: { maximum: 1000 }
validates :publish_at, presence: true
def save
post.attributes = { body: body, publish_at: publish_at }
post.save if valid?
end
end
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IUUQUFDINFEQFFSDPKQFOUSZ
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ͻͱͭͷΞΫγϣϯͰ
ͨ͘͞ΜΔ͜ͱ͕͋Δ
class PostsController < ApplicationController
def create
Hoge.prepare_create1 # なんらかの前処理1
@post = current_user.post.build(post_params)
Hoge.prepare_create2 # なんらかの前処理2
unless @post.save
Fuga.prepare_new # new を表示するためのいろいろな前処理
render :new and return
end
Foo.after # なんらかの後処理
Bar.after # なんらかの後処理2
end
end
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ϩδοΫΛϞσϧʹ
Ҡͯ͠TMJNʹͳΓ͖Εͳ͍
έʔε
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ղܾࡦ
ϞσϧͷϩδοΫΛݺͿՕॴΛ
நԽ͢Δ
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4FSWJDF0CKFDU
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ҙਓʹΑ͍ͬͯΖ͍Ζͳ
4FSWJDF͕͋Δ
w 1P&""ʮ4FSWJDF-BZFSʯ
w %%%ʮ4FSWJDFʯ
w ͦΕΒΛ౿·͑ͨ3BJMTͷʮ4FSWJDF0CKFDUʯ
w ͜Εෳछྨ͕͋Δ
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3BJMTͷ4FSWJDF0CKFDUʹ
ਓʹΑ༷ͬͯʑͳ࣮͕͋Δ
w ͖ͬ͞ͷ1030ͷྫΛ4FSWJDF0CKFDUͱݺΜͰ͍Δ
w ίϯτϩʔϥͷϩδοΫͷҰ෦ΛNPEVMFͷΫϥεϝιου
ʹҠͯͦ͠ΕΛ4FSWJDFͱݺΜͰ͍Δ
w ͦͷΞΫγϣϯͰ࣮ߦ͢Δ͜ͱΛ·ΔͬͱผΫϥεʹஔ͖
͑Δ
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͜ͷൃදͰͷ4FSWJDF0CKFDU
w ΞΫγϣϯͷࡉʑͨ͠෦Λ·Δͬͱ୲͏ΦϒδΣΫτ
w SFOEFS
SFEJSFDU@UPͳͲίϯτϩʔϥ͕Δ
w υϝΠϯϩδοΫϞσϧ͕Δ
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4FSWJDF0CKFDU
class CreatePostService
attr_reader :result
def self.call(user:, params:)
new(user: user, params: params).call
end
def initialize(user:, params:)
@user = user
@params = params
@result = true
end
def call
before_callback
unless post.save
fail!
prepare_new
return
end
after_callback
self
end
def post
@post ||= user.post.build(params)
end
private
attr_reader :user, :paramas
def before_callback
Hoge.prepare_create1
Hoge.prepare_create2
end
def after_callback
Foo.after
Bar.after
end
def prepare_new
Fuga.prepare_new
end
def fail!
@result = false
end
def post_params
params.require(:post).permit(:body)
end
end
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4FSWJDF0CKFDU
class PostsController < ApplicationController
def create
service = CreatePostService.call(user: current_user, params: params)
unless service.result
@post = service.post
render :new and return
end
redirect_to posts_path, notify: '作成されました'
end
end
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͜Ε͚ͩ͋Ε͋Δఔେ͖͍
3BJMTΞϓϦέʔγϣϯͰઓ͑Δ
w7JFX.PEFM
w'PSN0CKFDU
w4FSWJDF0CKFDU
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͔͠͠Ͳ͏ͬͯݱ
ʹಋೖ͢Δʁ
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νʔϜ։ൃʹ۩ମతͳྫ
Θ͔Γ͍͢υΩϡϝϯτ͕
ෆՄܽ
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౷Ұͨ͠ॻ͖ํʹ
༠ಋͰ͖Δπʔϧ͕༗Δͱྑ
͍ͷͰ
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IUUQTHJUIVCDPNXJMMOFUZVCB
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:VCBϙΤϜ
w 7JFX.PEFM
'PSN0CKFDU
4FSWJDF0CKFDUͷ࡞ิॿ༻HFN
w نʹΑΓ࡞ΓํͰ໎Θͳ͍Α͏ʹ
w 1030ͩͱຖճΒͳ͖Ό͍͚ͳ͍໘ͳهड़؆୯ʹ͔͚ΔΑ͏ʹ
w ඞཁͳͱ͜Ζ͚ͩಋೖͰ͖ΔΑ͏ʹ
w ಋೖࣺ͍ͯ͘͢͢͠࡞Γʹ
w ബ͘࡞Δ
w 3BJMTΤϯδχΞ͕ҧײͳ͑͘ΔΠϯλϑΣʔε
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ҙ
w WFSͰ͢
w ී௨ʹ͑ΔͣͰ͕͢ɺ͜Ε͔Β༷͕มΘΔՄೳੑ͕
͋Γ·͢
w ಛʹ:VCB'PSN
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1030Ͱ7JFX.PEFM
class PostViewModel
attr_reader :post
def initialize(post:, author:, other: nil)
@post = post
@author = author
@other = other
end
def title
post.title
end
def body
post.body
end
private
attr_reader :author, :other
end
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ຖճಉ͡Α͏ͳॲཧΛ
ॻ͔ͳ͚ΕͳΒͳ͍
class PostViewModel
attr_reader :post
def initialize(post:, author:, other: nil)
@post = post
@author = author
@other = other
end
def title
post.title
end
def body
post.body
end
private
attr_reader :author, :other
end
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:VCB7JFX.PEFM
class PostViewModel < Yuba::ViewModel
property :post
property :author, public: true
property :other, optional: true
def title
post.title
end
def body
post.body
end
end
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!WJFX@NPEFM
class PostsController < ApplicationController
def show
@view_model = PostViewModel.new(post: post, author: author)
end
end
<%= @view_model.post.title %>
<%= @view_model.author.name %>
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ඞͣ!WJFX@NPEFMΛ
ܦ༝͠ͳ͚ΕͳΒͳ͍
class PostsController < ApplicationController
def show
@view_model = PostViewModel.new(post: post, author: author)
end
end
<%= @view_model.post.title %>
<%= @view_model.author.name %>
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7JFX.PEFMΛల։ͯ͠
Πϯελϯεมʹׂ
class PostsController < ApplicationController
def show
view_model = PostViewModel.new(post: post, author: author)
render view_model: view_model
end
end
<%= @post.title %>
<%= @author.name %>
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:VCB4FSWJDF
class PostController < ApplicationController
def new
@post = CreatePostService.call(user: current_user).post
end
def create
service = CreatePostService.call(user: current_user, params: params)
if service.success?
redirect_to root_path
else
@post = service.post
render :new
end
end
end
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class CreatePostService < Yuba::Service
property :user, public: true
property :params, optional: true
def call
if post.save
notify_to_admin
else
fail!
end
end
def post
user.posts.build(post_params)
end
private
def notify_to_admin
AdminMailer.notify_create_post(post).deliver_later
end
def post_params
params.require(:post).permit(:title, :body)
end
end
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