Rails not rolling back transaction after failed save()

Question

I have this domain model: A user has group of items, and the state of the items can fail a validation.

Validation works fine, and I even see exceptions get called wh

Answer 1

Adding an item to the collection saves it immediately (unless the user is unsaved). The call to save creates its own transaction and that is what is rolled back, not the transaction in which the item is saved

You could force everything into the same transaction by creating one explicitly.

begin
  User.transaction do
    @user.items << item
    @user.save!
    render :json => {}, :status => :ok
  end
rescue ActiveRecord::RecordInvalid
  render :json => {:status => :error, :errors => item.errors}, :status => :bad_request
end