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Rails6を試す

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  • リリースされていたので、アップデートしてみる https://weblog.rubyonrails.org/2019/8/15/Rails-6-0-final-release/
  • 対象 https://github.com/umemak/hello_app
  • Gemfileを編集
    gem 'rails', '>=6.0.0'
  • bundle updateする環境を準備
    docker run -it -v `pwd`:/usr/src/work ruby bash
  • bundle update
    root@5655bc438c4d:/usr/src/work# bundle update
Fetching gem metadata from https://rubygems.org/............
Fetching gem metadata from https://rubygems.org/.
Resolving dependencies....
Bundler could not find compatible versions for gem "railties":
  In Gemfile:
    coffee-rails (= 4.2.2) was resolved to 4.2.2, which depends on
      railties (>= 4.0.0)

    jquery-rails (= 4.3.1) was resolved to 4.3.1, which depends on
      railties (>= 4.2.0)

    rails (>= 6.0.0) was resolved to 6.0.0, which depends on
      railties (= 6.0.0)

    sass-rails (= 5.0.6) was resolved to 5.0.6, which depends on
      railties (>= 4.0.0, < 6)

    web-console (= 3.5.1) was resolved to 3.5.1, which depends on
      railties (>= 5.0)

Bundler could not find compatible versions for gem "spring":
  In Gemfile:
    spring (= 2.0.2)

    spring-watcher-listen (= 2.0.1) was resolved to 2.0.1, which depends on
      spring (>= 1.2, < 3.0)
    とりあえず、エラーになっているgemのバージョン指定に>=をつけてupdateできた。
    root@5655bc438c4d:/usr/src/work# rails -v
Rails 6.0.0
  • 動作確認
    rails s
    execjsでエラー。https://github.com/rails/execjs の通りにgemをインストール
    gem install execjs
    まだエラー。JSの実行環境も必要らしいのでnodejsをインストール
    apt update
apt install nodejs -y

    root@d02c06050dc6:/usr/src/work# rails s
=> Booting Puma
=> Rails 6.0.0 application starting in development 
=> Run `rails server --help` for more startup options
Puma starting in single mode...
* Version 3.9.1 (ruby 2.6.3-p62), codename: Private Caller
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop
    動いた！ が、port開け忘れた。。。 docker再起動してもいいけどbundle install時間かかるし。。
  • docker commit 別のターミナル開いて、イメージにタグつけて保存して起動しなおす
    $ docker commit 5655bc438c4d rails6test
$ docker run -it -p 3000:3000 -v `pwd`:/usr/src/work rails6test bash
root@d02c06050dc6:/usr/src/work# rails s
=> Booting Puma
=> Rails 6.0.0 application starting in development 
=> Run `rails server --help` for more startup options
Puma starting in single mode...
* Version 3.9.1 (ruby 2.6.3-p62), codename: Private Caller
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop
    できた。
  • http://127.0.0.1:3000
    2019-08-18 02:08:23 +0000: Rack app error handling request { GET / }
#<LoadError: Error loading the 'sqlite3' Active Record adapter. Missing a gem it depends on? can't activate sqlite3 (~> 1.4), already activated sqlite3-1.3.13. Make sure all dependencies are added to Gemfile.>
    む。。。 Gemfileのsqlite3もバージョン指定を緩める。
    Started GET "/" for 172.17.0.1 at 2019-08-18 02:19:05 +0000
Cannot render console from 172.17.0.1! Allowed networks: 127.0.0.0/127.255.255.255, ::1
   (5.8ms)  SELECT sqlite_version(*)
Processing by ApplicationController#hello as HTML
  Rendering html template
  Rendered html template (Duration: 1.9ms | Allocations: 5)
Completed 200 OK in 39ms (Views: 30.3ms | ActiveRecord: 0.0ms | Allocations: 1383)
    できた！
  • https://github.com/umemak/hello_app/commit/84cc280f3776cc72d85c9bac088f8ef50cd5eaf8