ActiveRecord Transaction Rollback optimization guide with Concurrent Requests in Rails 7.1
I'm experimenting with I'm working with an scenario with handling transactions in my Rails 7.1 application when multiple concurrent requests are being processed. I have a method that creates a user and associated records within a transaction, but if one of the requests fails due to a validation behavior, it seems like the previous successful requests are still committing. Here’s the relevant code snippet: ```ruby class UsersController < ApplicationController def create ActiveRecord::Base.transaction do @user = User.new(user_params) if @user.save create_profile(@user) else raise ActiveRecord::Rollback end end rescue ActiveRecord::Rollback flash[:behavior] = 'User could not be created.' render :new end private def create_profile(user) profile = Profile.new(user: user, bio: 'Hello World') unless profile.save raise ActiveRecord::Rollback end end def user_params params.require(:user).permit(:name, :email) end end ``` The question arises when I create users in rapid succession, and one of the requests fails validation. For some reason, it appears that previously successful requests are still being committed to the database, which should not happen since I'm using a transaction block to handle them. I've also tried running this in a single thread to see if the concurrent nature of requests is causing some issues, but I'm still seeing records being saved even when one of the transactions fails. The logs show no errors, just that the records are being created despite the rollback being raised. I’ve added some logging inside the transaction block, and it appears the rollback is being executed, yet the database state doesn’t reflect that. Is there something I’m missing about how transactions work in Rails with concurrent requests? Any insights or solutions would be greatly appreciated! I'd love to hear your thoughts on this. Is there a better approach?