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RailsによるアジャイルWebアプリケーション開発

p.260まで。

第16章 タスクK:デプロイと本番環境

  • 過去のスタンダードはApache + Passenger
  • 今は Nginx + Unicorn がスタンダードのようだ
  • Capistranoを使って自動化しないと手間&ミスが起こる
  • 2 -> 3 になってコマンドや書き方が違うので注意
  • ログのローテート
    • config/environments/production.rb
    • daily や weeklyにしたい場合
    config.logger = Logger.new(config.paths["log"].first, 'dialy')
    • サイズでわけたい場合(10ファイル保持)
    require 'active_support/core_ext/numeric/bytes'
    config.logger = Logger.new(config.paths["log"].first, 10, 10.megabytes)

第17章 Depotのふりかえり

  • 成果物のドキュメント
    • sdocがGemfileに初期設定されている

https://rubygems.org/gems/sdoc

% sdoc -o doc/rails rails

f:id:yossk:20150128224141j:plain

  • コードの分量確認
% ./bin/rake stats
+----------------------+-------+-------+---------+---------+-----+-------+
| Name                 | Lines |   LOC | Classes | Methods | M/C | LOC/M |
+----------------------+-------+-------+---------+---------+-----+-------+
| Controllers          |   502 |   361 |       9 |      56 |   6 |     4 |
| Helpers              |    22 |    22 |       0 |       1 |   0 |    20 |
| Models               |    79 |    64 |       5 |       6 |   1 |     8 |
| Mailers              |    17 |    15 |       2 |       2 |   1 |     5 |
| Javascripts          |    40 |     3 |       0 |       2 |   0 |    -1 |
| Libraries            |     0 |     0 |       0 |       0 |   0 |     0 |
| Controller specs     |   328 |   269 |       0 |       0 |   0 |     0 |
| Feature specs        |    70 |    59 |       0 |       0 |   0 |     0 |
| Mailer specs         |    43 |    34 |       0 |       0 |   0 |     0 |
| Model specs          |    72 |    63 |       0 |       0 |   0 |     0 |
+----------------------+-------+-------+---------+---------+-----+-------+
| Total                |  1173 |   890 |      16 |      67 |   4 |    11 |
+----------------------+-------+-------+---------+---------+-----+-------+
  Code LOC: 465     Test LOC: 425     Code to Test Ratio: 1:0.9

第18章 Railsの構造

  • libフォルダもautoloadされるパスに最初から追加されている
    • lib/sample_libs/sample_class.rb が有ったとすると、requireすれば使える
require 'sample_libs/sample_class'
SampleClass.new.say
  • rakeタスク
    • lib/tasks/db_schema_migrations.rb
namespace :db do
  desc "マイグレーションバージョンを表示する"
  task schema_migrations: :environment do
    puts ActiveRecord::Base.connection.select_values(
      'select version from schema_migrations order by version'
    )
  end
end
% ./bin/rake db:schema_migrations
  • Controller は階層を付きでgenerate出来る
% rails g controller Admin::Books index show
      create  app/controllers/admin/books_controller.rb
       route  namespace :admin do
  get 'books/show'
  end
       route  namespace :admin do
  get 'books/index'
  end
      invoke  haml
      create    app/views/admin/books
      create    app/views/admin/books/index.html.haml
      create    app/views/admin/books/show.html.haml
      invoke  rspec
      create    spec/controllers/admin/books_controller_spec.rb
      invoke  helper
      create    app/helpers/admin/books_helper.rb
      invoke    rspec
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/admin/books.coffee
      invoke    scss
      create      app/assets/stylesheets/admin/books.scss

# 第19章 ActiveRecord

  • 単数形、複数形でうまくいかない場合は infrection を設定するより、self.table_name を設定してやるのが解りよさそう
  • _before_type_cast は Rubyの型に直す前の状態が取れる(全部文字列?)
% rails c --sandbox                                                                                                             [git:master]
Loading development environment in sandbox (Rails 4.2.0)
Any modifications you make will be rolled back on exit
[1] pry(main)> order = FactoryGirl.create(:order)
   (0.1ms)  SAVEPOINT active_record_1
  SQL (17.8ms)  INSERT INTO "orders" ("name", "address", "email", "pay_type", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?, ?)  [["name", "Guadalupe Kassulke Sr."], ["address", "East Helene"], ["email", "jairo_brekke@lubowitz.com"], ["pay_type", "現金"], ["created_at", "2015-01-28 13:08:39.837913"], ["updated_at", "2015-01-28 13:08:39.837913"]]
   (0.1ms)  RELEASE SAVEPOINT active_record_1
=> #<Order:0x007ff12b872368
 id: 102,
 name: "Guadalupe Kassulke Sr.",
 address: "East Helene",
 email: "jairo_brekke@lubowitz.com",
 pay_type: "現金",
 created_at: Wed, 28 Jan 2015 13:08:39 UTC +00:00,
 updated_at: Wed, 28 Jan 2015 13:08:39 UTC +00:00>
[2] pry(main)> order.created_at_before_type_cast
=> 2015-01-28 13:08:39 UTC
[3] pry(main)> order.created_at
=> Wed, 28 Jan 2015 13:08:39 UTC +00:00
  • 特別な列名

http://guides.rubyonrails.org/active_record_basics.html

class CreateBooks < ActiveRecord::Migration
  def change
    create_table :books, id: false do |t|
      t.string :isbn, null: false
      t.string :title
      t.integer :price

      t.timestamps null: false
    end

    add_index :books, :isbn, unique: true
  end
end
  • app/models/book.rb
class Book < ActiveRecord::Base
  self.primary_key = :isbn
end
% rails c --sandbox
Loading development environment in sandbox (Rails 4.2.0)
Any modifications you make will be rolled back on exit
[1] pry(main)> book = Book.new
=> #<Book:0x007fa4b3a44408 isbn: nil, title: nil, price: nil, created_at: nil, updated_at: nil>
[2] pry(main)> book.isbn = "4774165166"
=> "4774165166"
[3] pry(main)> book.title = "パーフェクト Ruby on Rails"
=> "パーフェクト Ruby on Rails"
[4] pry(main)> book.save
   (0.1ms)  SAVEPOINT active_record_1
  SQL (0.4ms)  INSERT INTO "books" ("isbn", "title", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["isbn", "4774165166"], ["title", " ーフェクト Ruby on Rails"], ["created_at", "2015-01-28 13:26:19.199587"], ["updated_at", "2015-01-28 13:26:19.199587"]]
   (0.1ms)  RELEASE SAVEPOINT active_record_1
=> true
[5] pry(main)> book.id
=> "4774165166"
[6] pry(main)> book.isbn
=> "4774165166"
[7] pry(main)> Book.find "4774165166"
  Book Load (0.2ms)  SELECT  "books".* FROM "books" WHERE "books"."isbn" = ? LIMIT 1  [["isbn", "4774165166"]]
=> #<Book:0x007fa4b7ce1158
 isbn: "4774165166",
 title: "パーフェクト Ruby on Rails",
 price: nil,
 created_at: Wed, 28 Jan 2015 13:26:19 UTC +00:00,
 updated_at: Wed, 28 Jan 2015 13:26:19 UTC +00:00>
  • 多対多 has_and_belongs_to_many
    • アソシエーションモデルを作製することなく(実テーブルは必要)、命名規則によって検索する
    • has_many :hoge, through: :moge で良い気がするので、多分使うことない
      • モデルが存在しないことも抵抗がある