回答編集履歴
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追記
test
CHANGED
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@@ -9,3 +9,31 @@
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Successfully installed mysql2-0.5.3
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1 gem installed
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＜追記＞
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ちなみにrails newの時にmysqlを指定すれば、bundlerが勝手にmysql2をインストールしてくれます。
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1 source 'https://rubygems.org'
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2 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
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4 ruby '3.0.0'
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6 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
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7 gem 'rails', '~> 6.1.3'
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8 # Use mysql as the database for Active Record
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9 gem 'mysql2', '~> 0.5'
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