Handling null amounts

[C10ne]

I'm looking for advice on what is the best way to deal with null amounts.

For example, if I have nullable field amount in database, I would do something like:

function getAmount(): ?Money
{
return $amount ? money($amount, 'USD') : null;
}

function setAmount(?float $value): void
{
$amount = $value ? money($value, 'USD')->getValue() : null;
}

Otherwise, I get exception that amount is invalid.

Is there another way to handle this case?

[andrewdwallo]

Always have a default value for amount, not nullable. Use 0. No amount can be interpreted as the same thing as 0.