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環境構築 5 Railsの導入

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#1. bundlerをインストール
Rubyの拡張機能(gem)を管理するためのbundler(バンドラー)をインストール。
ターミナルに入力

% gem install bundler --version='2.1.4'

#2. Railsをインストール

% gem install rails --version='6.0.0'

#3. rbenvを再読み込み
rbenvを読み込んで、変更を反映させる。

% rbenv rehash

#4. Railsが導入できたか確認
Rails 6.0.0のような表示がされれば問題なくインストールが完了。

% rails -v
Rails 6.0.0  # 「Rails」のあとに続く数字は変わる可能性があります
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