I dont think that's true. I'm aware that there's an order_id in spree_adjustments but I think we will probably drop that field later on. Considering we still want to adjust orders, to have adjustments at the order level the `adjustments` association on an order will only contain adjustment targeted at orders, not the ones at line items or shipments. Please see:

```ruby
    has_many :adjustments, -> { order('created_at ASC') }, as: :adjustable, dependent: :destroy
    has_many :line_item_adjustments, through: :line_items, source: :adjustments

    has_many :shipment_adjustments, through: :shipments, source: :adjustments
```

That's why I was not sure how to sum those adjustments and why I think one option is to have a `total` field in line item and shipments. Makes sense?