DEPRECATION WARNING: ActiveModel::Errors#set is deprecated and will be removed in Rails 5.1. Use model.errors.add(:preferred_discount_amount, ["has an invalid format. Please enter a number."]) instead. (called from block (2 levels) in localize_number at /home/runner/work/openfoodnetwork/openfoodnetwork/lib/spree/localized_number.rb:38)
This fixes the error UK's is experiencing:
```
PG::AmbiguousColumn: ERROR: column reference "state" is ambiguous LINE
1: SELECT DISTINCT spree_orders.*, CASE WHEN state IN ('cancele...
^ : SELECT DISTINCT spree_orders.*, CASE WHEN state IN ('canceled',
'returned') THEN payment_total WHEN state IS NOT NULL THEN payment_total
- total ELSE 0 END AS balance_value, spree_orders.* FROM "spree_orders"
INNER JOIN "spree_shipments"
```
See
https://app.bugsnag.com/yaycode/openfoodnetwork-uk/errors/6058c45989d37300079e8312?event_id=6058ccd30075af73bcb20000&i=sk&m=nw.
In this class we properly calculated the balance taking into account the
orders in cancellation state so we need to use the new implementation if
we don't want to introduce a regression by using
`#old_oustanding_balance`.
I was initially a bit dubious because this method was checking
`order.payments` as well but now I see that was redundant. Is on
`payment_total` to take into account whether or not the order is paid or
any other payment related details.
This class is currently used and it gets skipped when the
:customer_balance toggle is enabled, so there's no point on abstracting
the balance with `OrderBalance`. It'll never go through its
`#new_outstanding_balance` branch and it'll be removed once we active
that toggle to everyone.
This will let us branch by abstraction. All existing calls to
`#outstanding_balance` will go through `OrderBalance` hence, will
check the feature toggle.
Note that by default, `OrderBalance` will end up calling
`#old_outstanding_balance`. As the name states, that's exactly what
`#outstanding_balance` was so far. This means no consumers will see any
change in behavior. We just added on item in the call stack (sort of).
