I’m trying to extend Spree::Adjustable::Adjuster as documented in the guide (http://guides.spreecommerce.org/developer/adjustments.html). The directions aren't to hard to follow and I followed them to a T but I'm getting the following error:
`<module:Adjuster>': uninitialized constant Spree::Adjustable::Adjuster::Base (NameError)
What version of Spree are you using?
This feature was added in 3.1.
https://github.com/spree/spree/blame/3-1-stable/core/app/models/spree/adjustable/adjuster/base.rb
https://github.com/spree/spree/blame/master/guides/content/developer/core/adjustments.md#L99-L146