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Railsでmysqlにパスワードなしでアクセスできるように変更する

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はじめに

mysqlの再インストールをしたら、database.ymlにパスワードを書き込まないとDB作成ができなくなった。ローカルで開発している時は不便なので、パスワード不要に変更した。いずれまたハマりそうな気がするのでメモを残しておく。

手順

$ mysql -uroot -p
mysql> use mysql
mysql> update user set authentication_string=password("") where user='root'; 
mysql> flush privileges;
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