The New Asynchronous Query Loading

?? Ruby on Rails X-ray: Uncovering Rails 8 Hidden Gems! ??

Hey Rubyists! Ready to explore some of the major but lesser-known changes in Rails 8? Let’s put on our X-ray glasses and dive deep into the Rails 8 codebase to uncover these hidden treasures! ??♂???

?? Topic: The New Asynchronous Query Loading

Rails 8 brings a game-changing feature: asynchronous query loading. This enhancement allows your Active Record queries to be loaded asynchronously, improving performance and responsiveness in your Rails applications.

Let's take a closer look:

Imagine a Rails application with a complex dashboard that loads multiple data sets. Traditionally, each query would block the request until it's completed. With asynchronous query loading, queries can be run in parallel, reducing the total load time.

How to Use Asynchronous Queries in Rails 8:

1. Enable Asynchronous Queries: Rails 8 makes enabling asynchronous queries by default in your application configuration easy.

# config/application.rb
module YourApp
   class Application < Rails::Application
      config.active_record.async_query_executor = :global_thread_pool
  end
end        

2. Using Asynchronous Queries: Once enabled, you can mark queries to be executed asynchronously.

# app/controllers/dashboard_controller.rb
class DashboardController < ApplicationController
   def index
      @users = User.async.all
      @posts = Post.async.recent.limit(10)
      @comments = Comment.async.latest.limit(5)
  end
end        

How It Works:

• Async Method: The async method indicates that the query should be executed asynchronously.
• Global Thread Pool: Queries are run in a global thread pool, optimizing performance without overloading the database.

Deeper Insight with X-ray Vision:

The asynchronous query loading in Rails 8 leverages Ruby’s concurrent features to improve performance. Here’s a peek under the hood:

# ActiveRecord::Base
module ActiveRecord
  class Base
    def self.async
      AsyncQueryBuilder.new(self)
    end
  end

  class AsyncQueryBuilder
    def initialize(klass)
      @klass = klass
    end

    def method_missing(name, *args, &block)
      query = @klass.send(name, *args, &block)
      Concurrent::Promise.execute { query.load }
    end
  end
end
        

Fun Fact:

Did you know? With asynchronous query loading, your Rails app can handle more concurrent users without a performance hit, making it feel faster and more responsive!

Why Use Asynchronous Queries in Rails 8?

• Performance Boost: Run multiple queries in parallel, reducing total load time.
• Improved Responsiveness: Enhance user experience by making your app faster.
• Scalability: Better handle high traffic without overloading your database.

?? Pro Tip: Use asynchronous queries judiciously. Ensure that your database can handle the concurrent load and monitor performance to avoid bottlenecks.

Ready to supercharge your Rails 8 app with asynchronous queries? Give it a try and watch your app's performance soar! If you’ve got any cool Rails 8 tricks up your sleeve, share them in the comments below! ??

Happy coding! ???

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