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[8.0.1] association_basics.mdの原文更新を訳文に反映 #1799

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[8.0.1] association_basics.mdの原文更新を訳文に反映 #1799

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2 changes: 1 addition & 1 deletion guides/source/ja/association_basics.md
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Expand Up @@ -2513,7 +2513,7 @@ class Author < ApplicationRecord
end
```

上の宣言のままでは、`@author.books.size`の値を知るためにデータベースで`COUNT(*)`クエリをデフォルトで実行します。
上の宣言のままでは、`author.books.size`の値を知るためにデータベースで`COUNT(*)`クエリをデフォルトで実行します。

これを最適化するには、以下のように、そのモデルに「**従属する側の**モデル（`belongs_to`を宣言している側のモデル）」にカウンタキャッシュを追加します。これにより、Railsはデータベースにクエリを送信せずにキャッシュから直接カウントを返せるようになります。

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