Rails 7: implementing ActiveRecord Callbacks and Transaction Rollback Behavior on Complex Updates
I'm trying to debug I'm having trouble with ActiveRecord callbacks when performing complex updates in my Rails 7 application. I have a model that is supposed to update multiple associated records within a transaction, but I'm running into issues where the rollback behavior is not what I expect. For example, I have a `User` model that has many `Posts`, and I'm trying to update the `User` attributes and also update all `Posts` in one transaction. Here's a simplified version of my code: ```ruby class User < ApplicationRecord has_many :posts before_update :ensure_posts_are_updated def ensure_posts_are_updated posts.each do |post| post.update!(title: "Updated Title") end end end ``` And here's how I'm invoking the update: ```ruby User.transaction do user = User.find(params[:id]) user.update!(name: params[:name]) end ``` However, if the `update!` for any `Post` fails, it raises an exception and rolls back the entire transaction, including the user update, which is expected. But I noticed that if `update!` fails due to validation errors, the `before_update` callback doesn’t seem to handle the rollback consistently. Here's the behavior I'm seeing: ``` ActiveRecord::RecordInvalid: Validation failed: Title need to be blank ``` My expectation was that if the `Title` of a `Post` is invalid, only that `Post` should unexpected result and the user update should still succeed. I’ve tried using `update` instead of `update!`, but that doesn't give me the feedback I need for validating changes. Is there a good way to manage this while keeping the user update intact if the posts unexpected result validation? Any best practices for handling such cases in Rails 7 would be greatly appreciated! My development environment is Windows 10. What am I doing wrong?