I ran into this recently. Almost the exact same usecase, although I had canceled line items, instead of posts. There is one usecase where this works, though.

I ran into this recently. Almost the exact same usecase, although I had canceled line items, instead of posts. There is one usecase where this works, though. class Post < ActiveRecord::Base default_scope { include(:author) } end In my case, the parent model depended on the child-model to be present when running a few methods (calculating the total for line items), so I decided to do this for eager loading.