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【初心者】赤文字なんて怖くない!Railsのエラーについて考えてみる。

Last updated at Posted at 2019-11-23

勉強の忘備録に。更新していきます。

ターミナルでRubyonRailsで新しくアプリケーションを作成しようとした時、
以下のようなエラーが出ました。

An error occurred while installing mysql2 (0.5.2), and Bundler cannot
continue.
Make sure that `gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'`
succeeds before bundling.

以下のコードを書く事で解決しました。

$ gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/' -- --with-cppflags=-I/usr/local/opt/openssl/include --with-ldflags=-L/usr/local/opt/openssl/lib
$ cd ~/projects/【プロジェクトの名前】
$ bundle install

ただし先程までちゃんと作成できていたのに、
突然できなくなる原因の根源は不明です…

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