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【Rails】Herokuでmaster.keyを設定する

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credentialsファイルからシークレットキーなどを読み込むような設定にしている場合、サーバー側にmaster.keyの情報を渡しておく必要があります。

Herokuでは以下のコマンドだけで設定できます。

ターミナル
$ heroku config:set RAILS_MASTER_KEY=`cat config/master.key`

デプロイするときにcredentials関係でエラーになった場合はマスターキーの確認をしてみてください。

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