[Rails Tips] Rails 7.1 – ActiveRecord::QueryMethods#select has added support for hash values

Thuan Nguyen Van — Thu, 18 Jan 2024 01:45:59 +0000

Trong bản cập nhật mới nhất của, Rails 7.1 đã cho phép chúng ta query select theo giá trị hash chứ không cần phải sử dụng raw SQL nữa.

💎 Improvements:
1️⃣ New support query với giá trị Hash
2️⃣ Chúng ta không cần phải dùng truy vấn raw version nữa

💎 Bonus:
1️⃣ Cú pháp mới cũng support chúng ta sử dụng alias
2️⃣ Sử dụng tương tự cho ActiveRecord#reselect

Ruby

# Before Rails 7.1

Post.joins(:comments)
    .select(
      "posts.id as post_id, posts.title as post_title,
      comments.id as comment_id, comments.body as comment_body"
    )
    
Post.joins(:comments).select(:id, :title, "comments.body")

# After Rails 7.1

Post.joins(:comments)
    .select(
      posts: { id: :post_id, title: :post_title },
      comments: { id: :comments_id, body: :comment_body }
    )
    
Post.joins(:comments).select(:id, :title, comments: [:body] )

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[Rails Tips] Rails 7.1 – ActiveRecord::QueryMethods#select has added support for hash values