Active Record - Hashimoto-Noriaki/rails-rspec-memo GitHub Wiki https://zenn.dev/nakamura_fumiya/articles/c3ebcbe66a70b6 https://qiita.com/7coco/items/2e3a9e720d29791f1cfc#:~:text=ActiveRecord%3A%3ARelation%20%E3%81%AF%[…]8D%E4%BD%9C%E3%81%8C%E5%8F%AF%E8%83%BD%E3%80%82 https://www.docswell.com/s/pink_bangbi/K88ELK-2022-10-22-133810 https://zenn.dev/nakamura_fumiya/articles/c3ebcbe66a70b6