The finance update command allows you to amend existing finance rows for cost recovery.

The command line allows you to specify only the fields that have changed, leaving the others intact. In order to check whether a value has been passed, the current logic is used:

new_finance["amount"] = amount if amount else old_finance["amount"]

So when no amount value is passed, amount will be set to None and so this will just end up as:

new_finance["amount"] = old_finance["amount"]

In other words: no change.

Unfortunately the condition also fails if you set amount to be zero. This means it's currently impossible to run a finance update command that sets the amount to zero, for example like this:

rctab sub finance update --finance-id <FIN_ID> --subscription-id <SUB_ID> --amount 0

Occasionally it's useful to set the amount of a finance row to zero, so it'd be useful if this was possible.