OSS Gateワークショップ 2016-06-11: ota42y: collectiveidea/delayed_job: 作業ログ about workshop

[ota42y]

• rails new中にrdoc/riの警告？メッセージが出る
• 1.9.2以上で実行しているならそもそも不要では？

note

Depending on your version of ruby, you may need to install ruby rdoc/ri data:

<= 1.8.6 : unsupported
 = 1.8.7 : gem install rdoc-data; rdoc-data --install
 = 1.9.1 : gem install rdoc-data; rdoc-data --install
>= 1.9.2 : nothing to do! Yay!

[ota42y]

• reading readme
• テスト落ちてる(´･_･`)？

[ota42y]

• 使い方
• 非同期に処理を実行できるgem

[ota42y]

• install
• Railsしかサポートしてないのでrailsも入れる

[ota42y]

• install
• nokogiriのインストール長い…(´･_･`)

bundle init

Gemfile
gem "rails"
gem 'delayed_job_active_record'

bundle install --path vendor/bundle
Using bundler 1.11.2
Installing delayed_job 4.1.2
Installing rails 4.2.6

[ota42y]

• インストール終わった
• 次は試しに動かす

[ota42y]

• 動かし方を読む
• ActiveRecordをバックエンドとして使うには job tableが必要らしい。AR以外をバックエンドにできるのかか？

[ota42y]

• AR以外のバックエンドが使えるのか調べる
• mongodbをバックエンドにできるらしい(別のgemも必要)
  If you plan to use delayed_job with Mongoid〜

[ota42y]

• job tableを作る
• rails newしてなかった…使い方間違えてた(｀・∀・´≡｀・∀・´)

note
rails generate delayed_job:active_record
rails newしろよーエラー

[ota42y]

• railsのインストール
• gem i rails

[ota42y]

• 他にどんなgemを使ってるか読む
• gem i rails中暇なので。
• activesupportが必須gem

[ota42y]

• テスト用railsアプリを作る
• API-modeは5移行なので4.2.6を入れてるので普通に作る
• ralis new delayed_job_test

[ota42y]

• gemの依存関係調査
• gemfileとgemspecの関係がわからない…
  • gemfile側にもrakeや platforms :rubyがあるけど、gemspec側にもdependencyがある
    • platforms指定はGemfilesじゃないとできない？
      • だとしたらrakeはgemspec側でも良いのでは？

[ota42y]

• rubocopってgemfileに書く必要あるの？
  • いつもコマンドで実行しているイメージ
  • requireしてないなら不要？開発時に必ず使うパスがある？

[ota42y]

• delayed_jobを入れる
• gem 'delayed_job_active_record'を書いてbundle install
  • delayed_jobは直接入れず、AR用のgemから依存関係で入るみたい
  • 多分mongodb版も同じかと

note

Installing delayed_job 4.1.2
Installing delayed_job_active_record 4.1.1

[ota42y]

• job table用のmigrationとか作る
• rails generate delayed_job:active_record
  • bin/delayed_jobもできた

code

Running via Spring preloader in process 16874
      create  bin/delayed_job
       chmod  bin/delayed_job
      create  db/migrate/20160611022955_create_delayed_jobs.rb

[ota42y]

• job tableのmigration実行
• rake db:migrate
  • エラー(´･_･`)

code

rake aborted!
Gem::LoadError: You have already activated rake 10.4.2, but your Gemfile requires rake 11.1.2. Prepending `bundle exec` to your command may solve this.
files/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
files/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
files/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
LoadError: cannot load such file -- bundler/setup
files/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
files/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
files/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)

[ota42y]

• システムのrake が使われてた
• bundle exec rake ではなく rake で実行していた

code

rake --version
rake, version 10.4.2
bundle exec rake --version
rake, version 11.1.2

[ota42y]

• システムのrake消す
• できない
  • default gemらしい。
  • 必須だから消せない→知らないうちに古いrake使ってる可能性が

note

gem uninstall rake
ERROR:  While executing gem ... (Gem::InstallError)
    gem "rake" cannot be uninstalled because it is a default gem

[ota42y]

readme にbundle exec rakeにして欲しい

[ota42y]

• そもそもbundle exec rake実行してもrequireに失敗するのでは？
• グローバルにrakeのバージョン指定してインストールしてみる

[ota42y]

• rakeを11.1.2に上げる
• gem install rake -v 11.1.2

note

rake --version
rake, version 11.1.2

[ota42y]

• rake11.1.2でbundleを使わずにマイグレーションする
• rake db:migrate
  • 通った(´･_･`)！
  • rakeタスク内でdependencyのgemをrequireしてなければいけるのかな…？

note

== 20160611022955 CreateDelayedJobs: migrating ================================
-- create_table(:delayed_jobs, {:force=>true})
   -> 0.0033s
-- add_index(:delayed_jobs, [:priority, :run_at], {:name=>"delayed_jobs_priority"})
   -> 0.0006s
== 20160611022955 CreateDelayedJobs: migrated (0.0041s) =======================

[ota42y]

• 4.2向けに読めって項目
• For Rails 4.2, see below
  • https://github.com/collectiveidea/delayed_job#rails-42
  • 設定してね

[ota42y]

• 開発時の機能
• 100個のjobごとか、queueが終わったタイミングでコードをリロードする
  • delayed_jobの再起動は要らないらしい…便利
  • jobとqueueのfinishってどう違うの？
    • queueのfinishはキューの一つの処理が終わったとき？キューがからになったとき？
  • 読み込む範囲はdelayed_jobが読み込むコード全て？delayed_job本体への変更は？
    • （リロードする周りに変更があった場合にリロードされる？）

どう扱うか検討しよう

[ota42y]

• queue_adapterの設定
• config.active_job.queue_adapter = :delayed_job
• 何故必要なのか？
  • http://guides.rubyonrails.org/active_job_basics.html#setting-the-backend
  • sidekiqから切り替えるため？
    • デフォルトだとsidekiqが使われる？
    • このgem独自では無い部分があるの？

[ota42y]

• rails4系の制約
• protected_attributes gemを使っている場合はgemfileの上に書く必要があるらしい
  • 何かと競合するから？
  • gemfileの書き順によってロード順が変わる？
  • requireの評価順で挙動が変わるのかな？？

[ota42y]

• protected_attributes gem
  • https://github.com/rails/protected_attributes
• mass-assignmentとは
  • http://wada811.blogspot.com/2013/08/strong-parameters-mass-assignment-vulnerability-countermeasure-in-rails4.html
    • user.update_attributes(params[:user])とかで予期せぬデータが変更されるアレ
  • permitで回避されるはずだけど、このgemは何をするgem何だろう？

[ota42y]

• model作る
• rails g model user name:string

note

      invoke  active_record
      create    db/migrate/20160611045154_create_users.rb
      create    app/models/user.rb
      invoke    test_unit
      create      test/models/user_test.rb
      create      test/fixtures/users.yml

[ota42y]

• delayed job用のメソッド作る
• こんな感じ

note

class User < ActiveRecord::Base
  def update_name(new_name)
    @name = new_name
    @name.save
  end
end

[ota42y]

• migration
• bundle exec rake db:migrate

note

== 20160611045154 CreateUsers: migrating ======================================
-- create_table(:users)
   -> 0.0014s
== 20160611045154 CreateUsers: migrated (0.0015s) =============================

[ota42y]

• 試してみる
• rails c

irb(main):001:0> u = User.create
   (0.1ms)  begin transaction
  SQL (0.4ms)  INSERT INTO "users" ("created_at", "updated_at") VALUES (?, ?)  [["created_at", "2016-06-11 04:57:29.630331"], ["updated_at", "2016-06-11 04:57:29.630331"]]
   (53.2ms)  commit transaction
=> #<User id: 1, name: nil, created_at: "2016-06-11 04:57:29", updated_at: "2016-06-11 04:57:29">
irb(main):002:0> u.name = "test"
=> "test"
irb(main):003:0> User.first
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" ASC LIMIT 1
=> #<User id: 1, name: nil, created_at: "2016-06-11 04:57:29", updated_at: "2016-06-11 04:57:29">

irb(main):004:0> u.save
   (0.1ms)  begin transaction
  SQL (0.3ms)  UPDATE "users" SET "name" = ?, "updated_at" = ? WHERE "users"."id" = ?  [["name", "test"], ["updated_at", "2016-06-11 05:02:18.719362"], ["id", 1]]
   (50.6ms)  commit transaction
=> true

irb(main):009:0* User.first
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" ASC LIMIT 1
=> #<User id: 1, name: "test", created_at: "2016-06-11 04:57:29", updated_at: "2016-06-11 05:02:18">

[ota42y]

• delay用メソッド動かす
• u.update_name('update_name_sync')
  • エラー
  • saveメソッド間違えてた(´･_･`)

  def update_name(new_name)
    name = new_name
    save
  end

[ota42y]

• 同期保存
• アップデートされてる

irb(main):006:0* u = User.create(name: 'before')
   (0.2ms)  begin transaction
  SQL (0.3ms)  INSERT INTO "users" ("name", "created_at", "updated_at") VALUES (?, ?, ?)  [["name", "before"], ["created_at", "2016-06-11 05:06:42.352407"], ["updated_at", "2016-06-11 05:06:42.352407"]]
   (14.8ms)  commit transaction
=> #<User id: 5, name: "before", created_at: "2016-06-11 05:06:42", updated_at: "2016-06-11 05:06:42">
irb(main):007:0> u.update_name('after_sync')
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
=> true
irb(main):008:0> u
=> #<User id: 5, name: "before", created_at: "2016-06-11 05:06:42", updated_at: "2016-06-11 05:06:42">
irb(main):009:0> User.last
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 5, name: "before", created_at: "2016-06-11 05:06:42", updated_at: "2016-06-11 05:06:42">

[ota42y]

• 非同期保存
• まだ呼ばれてない

u = User.create(name: 'async_before')
   (0.1ms)  begin transaction
  SQL (0.3ms)  INSERT INTO "users" ("name", "created_at", "updated_at") VALUES (?, ?, ?)  [["name", "async_before"], ["created_at", "2016-06-11 05:07:38.432976"], ["updated_at", "2016-06-11 05:07:38.432976"]]
   (52.3ms)  commit transaction
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">
u.delay.update_name('after_async')
   (0.1ms)  begin transaction
  SQL (0.4ms)  INSERT INTO "delayed_jobs" ("handler", "run_at", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["handler", "--- !ruby/object:Delayed::PerformableMethod\nobject: !ruby/object:User\n  raw_attributes:\n    name: async_before\n    id: 6\n    created_at: &1 2016-06-11 05:07:38.432976000 Z\n    updated_at: *1\n  attributes: !ruby/object:ActiveRecord::AttributeSet\n    attributes: !ruby/object:ActiveRecord::LazyAttributeHash\n      types:\n        id: &4 !ruby/object:ActiveRecord::Type::Integer\n          precision: \n          scale: \n          limit: \n          range: !ruby/range\n            begin: -2147483648\n            end: 2147483648\n            excl: true\n        name: &3 !ruby/object:ActiveRecord::Type::String\n          precision: \n          scale: \n          limit: \n        created_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter\n          subtype: &2 !ruby/object:ActiveRecord::Type::DateTime\n            precision: \n            scale: \n            limit: \n        updated_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter\n          subtype: *2\n      values:\n        id: \n        name: \n        created_at: \n        updated_at: \n      additional_types: {}\n      materialized: true\n      delegate_hash:\n        name: !ruby/object:ActiveRecord::Attribute::FromUser\n          name: name\n          value_before_type_cast: async_before\n          type: *3\n          value: async_before\n        id: !ruby/object:ActiveRecord::Attribute::FromUser\n          name: id\n          value_before_type_cast: 6\n          type: *4\n          value: 6\n        created_at: !ruby/object:ActiveRecord::Attribute::FromUser\n          name: created_at\n          value_before_type_cast: *1\n          type: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter\n            subtype: *2\n          value: *1\n        updated_at: !ruby/object:ActiveRecord::Attribute::FromUser\n          name: updated_at\n          value_before_type_cast: *1\n          type: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter\n            subtype: *2\n          value: *1\n  new_record: false\n  active_record_yaml_version: 0\nmethod_name: :update_name\nargs:\n- after_async\n"], ["run_at", "2016-06-11 05:08:24.300926"], ["created_at", "2016-06-11 05:08:24.301219"], ["updated_at", "2016-06-11 05:08:24.301219"]]
   (11.1ms)  commit transaction
=> #<Delayed::Backend::ActiveRecord::Job id: 1, priority: 0, attempts: 0, handler: "--- !ruby/object:Delayed::PerformableMethod\nobject...", last_error: nil, run_at: "2016-06-11 05:08:24", locked_at: nil, failed_at: nil, locked_by: nil, queue: nil, created_at: "2016-06-11 05:08:24", updated_at: "2016-06-11 05:08:24">
u
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">
User.last
  User Load (0.3ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">

[ota42y]

• 非同期テーブルに入ってるか確認
• 別バックエンドならActiveRecordが違うネームスペースになりそう

Delayed::Backend::ActiveRecord::Job.first
  Delayed::Backend::ActiveRecord::Job Load (0.2ms)  SELECT  "delayed_jobs".* FROM "delayed_jobs"  ORDER BY "delayed_jobs"."id" ASC LIMIT 1
=> #<Delayed::Backend::ActiveRecord::Job id: 1, priority: 0, attempts: 0, handler: "--- !ruby/object:Delayed::PerformableMethod\nobject...", last_error: nil, run_at: "2016-06-11 05:08:24", locked_at: nil, failed_at: nil, locked_by: nil, queue: nil, created_at: "2016-06-11 05:08:24", updated_at: "2016-06-11 05:08:24">

[ota42y]

• queueのjobを実行させる
  • https://github.com/collectiveidea/delayed_job#running-jobs
• どう実行させるんだ…？
  • bundle exec rake jobs:work

[ota42y]

• 変わったか確認
• 変わってない？

irb(main):034:0> User.last
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">
irb(main):035:0> u
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">
irb(main):036:0> u.reload
  User Load (0.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 6]]
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">
irb(main):037:0> Delayed::Backend::ActiveRecord::Job.count
   (0.2ms)  SELECT COUNT(*) FROM "delayed_jobs"
=> 0
irb(main):038:0> u
=> #<User id: 6, name: "async_before", created_at: "2016-06-11 05:07:38", updated_at: "2016-06-11 05:07:38">

[ota42y]

• 実行はされている
  • delayd_jobのテーブルが無くなってる

'''
[Worker(host:MBA.local pid:46727)] Starting job worker
[Worker(host:MBA.local pid:46727)] Job User#update_name (id=1) RUNNING
[Worker(host:MBA.local pid:46727)] Job User#update_name (id=1) COMPLETED after 0.0196
[Worker(host:MBA.local pid:46727)] 1 jobs processed at 15.6516 j/s, 0 failed
'''

[ota42y]

• sqliteの中身を見よう
• http://www.sequelpro.com/

[ota42y]

• sqliteはこっちだ
• http://sqlitebrowser.org/

[ota42y]

• 更新されない
• databaseからキューは消えてる
  • 実行もされているログは出ている
• データは変わってない
• ログファイルの一を探す

[ota42y]

• ログ見つつ実行
• tail -f log/development.log
• 実行はされているみたい？

t IS NULL)  ORDER BY priority ASC, run_at ASC LIMIT 5
  SQL (51.0ms)  UPDATE "delayed_jobs" SET "locked_at" = '2016-06-11 05:29:20.436216', "locked_by" = 'host:MBA.local pid:46727' WHERE "delayed_jobs"."id" IN (SELECT "delayed_jobs"."id" FROM "delayed_jobs" WHERE ((run_at <= '2016-06-11 05:29:20.435786' AND (locked_at IS NULL OR locked_at < '2016-06-11 01:29:20.435800') OR locked_by = 'host:MBA.local pid:46727') AND failed_at IS NULL) AND "delayed_jobs"."id" = ?  ORDER BY priority ASC, run_at ASC)  [["id", 3]]
  Delayed::Backend::ActiveRecord::Job Load (0.3ms)  SELECT  "delayed_jobs".* FROM "delayed_jobs" WHERE "delayed_jobs"."id" = ? LIMIT 1  [["id", 3]]
  User Load (0.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 6]]
2016-06-11T14:29:20+0900: [Worker(host:MBA.local pid:46727)] Job User#update_name (id=3) RUNNING
   (0.1ms)  begin transaction
   (0.1ms)  commit transaction
   (0.1ms)  begin transaction
  SQL (0.5ms)  DELETE FROM "delayed_jobs" WHERE "delayed_jobs"."id" = ?  [["id", 3]]
   (55.9ms)  commit transaction
2016-06-11T14:29:20+0900: [Worker(host:MBA.local pid:46727)] Job User#update_name (id=3) COMPLETED after 0.0597

[ota42y]

• printfデバッグ
• 以下のように変更

class User < ActiveRecord::Base
  def update_name(new_name)
    puts new_name
    name = new_name
    save
  end
end

irb(main):002:0> u.update_name('test')
test
   (0.1ms)  begin transaction
  SQL (0.3ms)  UPDATE "users" SET "name" = ?, "updated_at" = ? WHERE "users"."id" = ?  [["name", "test"], ["updated_at", "2016-06-11 05:34:36.231199"], ["id", 8]]
   (49.6ms)  commit transaction
=> true
irb(main):003:0> u.
Display all 375 possibilities? (y or n)
irb(main):003:0> User.last
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 8, name: "test", created_at: "2016-06-11 05:34:30", updated_at: "2016-06-11 05:34:36">

User.last
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 8, name: "test_async", created_at: "2016-06-11 05:34:30", updated_at: "2016-06-11 05:35:11">

できてた

[ota42y]

• activerecordの謎挙動

u.nameではアクセスできるのに、インスタンスメソッド内部で

  def update_name(new_name)
    name = new_name
    save
  end

とやるとアクセスできない…(´･_･`)？

[ota42y]

• priorityのテスト
• 低いやつと高いやつで上書きする
• priority無しでは順に実行して順に処理→最終的に2回目の方に
• priorityありにして、低いやつ高いやつで実行→最終的に低いやつの方になるはず

prority無し

  def update_name_low(new_name)
    self.name = new_name
    save
  end

  def update_name_high(new_name)
    self.name = new_name
    save
  end

u = User.last
u.delay.update_name_low('low_name')
u.delay.update_name_high('hih_name')
User.last # not change
  User Load (0.2ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" DESC LIMIT 1
=> #<User id: 8, name: "test_async", created_at: "2016-06-11 05:34:30", updated_at: "2016-06-11 05:35:11">

bundle exec rake jobs:work
実行

[ota42y]

• readme読み直した
• rails2はもう要らないのでは？

rails 2 not support
so delete this line?
See the 2.0 branch for Rails 2.

[ota42y]

bundle exec rakeが正しいのか
bin/rakeが正しいのか？

railsのおすすめドキュメントにどう書いてあるか

[ota42y]

• railsでは一般的にどうrakeを使うか
  • rails guide
    • http://guides.rubyonrails.org/command_line.html#rake
  • rails readme

[ota42y]

• そもそもbin/rakeで動くの？
• ./bin/rake db:drop
  Running via Spring preloader in process 79829
• springが邪魔をして動いてるかわからない…？

[ota42y]

• bundle exec rake db:dropではログが出ないので正しい挙動だ

[ota42y]

• rakeだとエラーになる
• bin/rakeだとエラーにならない

rake db:migrate
rake aborted!
Gem::LoadError: You have already activated rake 10.4.2, but your Gemfile requires rake 11.1.2. Prepending `bundle exec` to your command may solve this.

bin/rake

bin/rake db:migrate
Running via Spring preloader in process 85569
== 20160611022955 CreateDelayedJobs: migrating ================================
-- create_table(:delayed_jobs, {:force=>true})
   -> 0.0041s
-- add_index(:delayed_jobs, [:priority, :run_at], {:name=>"delayed_jobs_priority"})
   -> 0.0008s
== 20160611022955 CreateDelayedJobs: migrated (0.0051s) =======================

== 20160611045154 CreateUsers: migrating ======================================
-- create_table(:users)
   -> 0.0006s
== 20160611045154 CreateUsers: migrated (0.0007s) =============================

[ota42y]

• rails guide敵にはbin/rake
  • http://guides.rubyonrails.org/command_line.html#rake
• readmeには特に無い
  • https://github.com/rails/rails
• どっちが良いのかググる
  • https://www.google.co.jp/search?sourceid=chrome-psyapi2&ion=1&espv=2&ie=UTF-8&q=bundle%20exec%20or%20bin%2Frake&oq=bundle%20exec%20or%20bin%2Frake&aqs=chrome..69i57.3247j0j9

[ota42y]

• delayed_jobはrails3も対象なので、rails 3で使えないbin/rakeは使えない
• rails2は別ブランチ
• bundle install してるのにbundle execしないのおかしい
  • bundle exec 必須にするのは正しいのか？

[ota42y]

• こんな感じで送る

このgemのセットアップ手順ではbundle installしてる。
実行する段階では
rails generate delayed_job:active_record
rake db:migrate

となってるので、system rakeが使われる。
system rakeとbundle installによってインストールされたrakeバージョンは異なる場合がある。
bundle installで入れる事を前提としているなら、Readmeのコマンドも
bundle exec rails generate delayed_job:active_record
bundle exec rake db:migrate
とbundle execをつけるべき



% rake db:migrate
rake aborted!
Gem::LoadError: You have already activated rake 10.4.2, but your Gemfile requires rake 11.1.2. Prepending `bundle exec` to your command may solve this.
/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
LoadError: cannot load such file -- bundler/setup
/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)

[ota42y]

• 聞かないと問題ないかわからないので、聞こう

[ota42y]

In the README.md, use bundle install.
And gerenate database command like this.

rails generate delayed_job:active_record
rake db:migrate

But, this command not use bundler's rails and rake.
So, when rails&rake in global and in Gemfile.lock are different version,
we got error like this.

% rake db:migrate
rake aborted!
Gem::LoadError: You have already activated rake 10.4.2, but your Gemfile requires rake 11.1.2. Prepending `bundle exec` to your command may solve this.
/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
LoadError: cannot load such file -- bundler/setup
/workspace/delayed_job_test/config/boot.rb:3:in `<top (required)>'
/workspace/delayed_job_test/config/application.rb:1:in `<top (required)>'
/workspace/delayed_job_test/Rakefile:4:in `<top (required)>'
(See full trace by running task with --trace)

So we should use bundle exec when setup database table.

Same problem in this line.

rails generate delayed_job:upgrade
rake db:migrate

[ota42y]

The rails 2.x is very old, and it's no longer supported.
(http://guides.rubyonrails.org/maintenance_policy.html)

So I think this link is not necessary.

[ota42y]

collectiveidea/delayed_job#919
collectiveidea/delayed_job#920

[ota42y]

なんでacive_jobから切り替える必要あるのか？

[ota42y]

メンターがおかしいぞ？ってぼやいていたので空き時間にさくっと。
fluent/fluentd-docs#229

[kou]

お疲れさまでした！