floatformat() returns a str; saving that to ExchangeRate.rate (FloatField)
via create() leaves the Python instance attribute as a str. Reading it back
on the same instance (rate = exchange_rate.rate) then caused
`purchase.price * rate` to fail with "can't multiply sequence by non-int
of type 'float'".
Fix: pass the raw float from the API directly to ExchangeRate.objects.create.
Also replace floatformat(..., 0) on the converted price with round(..., 2)
to keep a numeric type throughout.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lukas
1fcef255a6
