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[Rails] 任意のファイルにアプリケーションログを吐く

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基本はlog/production.loglog/development.logに吐かれるログだが、特定機能のログは別ファイルに残したい場合など。

configへ設定

今回はlog/foo.logに吐かれるようにしてみます。

environments/production.rb
config.another_logger = Logger.new(Rails.root.join('log/foo.log'))

使う

fuga_controller.rb
Rails.application.config.another_logger.info('bar')

これだけです。

並行して、通常通りproduction.logに吐かせたいものは

fuga_controller.rb
Rails.logger.info('buzz')

にて。

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