回答編集履歴
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追記
test
CHANGED
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@@ -89,3 +89,59 @@
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リンク先に書いてある通りにやって10分でできました。dockerは便利ですね。
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**【追記】**
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以下のように`--rm`をつけないとゴミコンテンが増えてしまいます。
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```sh
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$ docker-compose run --rm web rails g controller StaticPages home help
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$ docker-compose run --rm web rails test
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```
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```sh
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$ docker-compose ps
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Name Command State Ports
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-----------------------------------------------------------------------------
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rails_db_1 docker-entrypoint.sh postgres Up 5432/tcp
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rails_web_1 bundle exec rails s -p 300 ... Up 0.0.0.0:3000->3000/tcp
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$ docker ps -a
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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52933a58373c rails_web "rails test" 13 minutes ago Exited (0) 13 minutes ago rails_web_run_4
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2b8ce1178dc0 rails_web "rails g controlle..." 14 minutes ago Exited (0) 14 minutes ago rails_web_run_3
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5c03a4144fe9 rails_web "rake db:create" 16 minutes ago Exited (0) 16 minutes ago rails_web_run_2
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718ffb33ba83 rails_web "bundle exec rails..." 16 minutes ago Up 7 minutes 0.0.0.0:3000->3000/tcp rails_web_1
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6103f114c226 462714f32758 "rails new . --for..." 20 minutes ago Exited (0) 20 minutes ago rails_web_run_1
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f902caef094a postgres "docker-entrypoint..." 22 minutes ago Up 7 minutes 5432/tcp rails_db_1
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```
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