Unexpected ActiveRecord transaction rollback on nested associations in Rails 7.1
I'm experiencing an scenario where a transaction is rolling back unexpectedly when creating nested associations in Rails 7.1. I have a `User` model that has many `Posts`, and each `Post` has many `Comments`. When I try to create a user along with their posts and comments in a single transaction, it seems to unexpected result without clear behavior messages. Here's the code I'm using: ```ruby User.transaction do user = User.create!(name: 'John Doe') posts = user.posts.create!([{ title: 'First Post', comments_attributes: [{ body: 'Great post!' }] }, { title: 'Second Post', comments_attributes: [{ body: 'Interesting read!' }] }]) end ``` The above code raises an `ActiveRecord::RecordInvalid` behavior, but what confuses me is that the behavior message doesn’t specify which part of the transaction is failing. I've tried wrapping the creation of posts and comments separately, but I still face the same scenario. When I isolate the user creation and the posts/comments creation into separate transactions, they work fine, so it seems to be something about the nested attributes within this single transaction. I’ve also checked my strong parameters in the controller, and they seem to be set up correctly: ```ruby def user_params params.require(:user).permit(:name, posts_attributes: [:title, comments_attributes: [:body]]) end ``` I’m using PostgreSQL as my database and have confirmed that the table structure is correct. Is there a best practice or configuration I might be missing that could help in debugging this nested transaction scenario? Any insights would be appreciated! This is part of a larger CLI tool I'm building. This is part of a larger service I'm building. Am I missing something obvious?