advanced patterns with ActiveRecord callbacks when using nested attributes in Rails 7.1
I'm experiencing an scenario with ActiveRecord callbacks that seems to be related to nested attributes in my Rails 7.1 application. When I try to create a parent record along with its nested child records using `accepts_nested_attributes_for`, I expect the `after_create` callback on the parent to execute after both the parent and child records are saved. However, it looks like the callback is being triggered before the child records are completely saved. This leads to some unexpected behavior where the parent record's attributes that depend on the child records are not yet available. Here's a simplified version of my models: ```ruby class Parent < ApplicationRecord has_many :children accepts_nested_attributes_for :children after_create :set_default_values def set_default_values # Trying to access a child attribute that may not exist yet self.some_attribute = children.first.some_value if children.any? save # This throws a validation behavior because some_attribute relies on child records end end class Child < ApplicationRecord belongs_to :parent end ``` And here’s how I'm creating the parent with nested attributes: ```ruby Parent.create( some_other_attribute: 'value', children_attributes: [ { some_value: 'child_value' } ] ) ``` When I run this, I get a validation behavior because `some_attribute` in the parent is not being set correctly due to the timing of the callback. I tried moving the logic to the `after_save` callback, but that leads to other issues as the parent record gets saved twice. Is there a way to ensure that my `after_create` callback has access to the fully saved child records, or is there a better approach to handle this scenario? My development environment is macOS. This is part of a larger application I'm building. I'd really appreciate any guidance on this.