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【Laravel】 Symfony\Component\Debug\Exception\FatalThrowableError : Class 'Doctrine\DBAL\Driver\PDOMySql\Driver' not found

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#はじめに
知識を整理するための個人的な備忘録です。

カラム型の変更をした際、

$ composer require doctrine/dbal

のコマンドでdoctrine/dbalを入れてからphp artisan migrateしたのにエラーが出た。

Symfony\Component\Debug\Exception\FatalThrowableError  : Class 'Doctrine\DBAL\Driver\PDOMySql\Driver' not found

#解決方法
原因は

・composer require doctrine/dbalだけでインストールすると、今は3.x系が入ってしまう
・3.x系はDriverディレクトリの構成が変わっているので、migrateする時に2.x系にあったPDOMySqlがnotfoundになる

らしい。

$ composer require "doctrine/dbal:2.*"

doctrine/dbal をバージョン指定で入れ直すことで解決。

#参考

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