Deserialization error on Pricing plans with null Price per Unit or Flat Fee

[pat-eason]

Building out a test "create customer with subscription and products" method I kept getting a deserialization error when I would attempt to create a subscription with plans that had either nulls in the price per unit or flat fee. The UI allows for creating those kinds of plans and doesn't throw an error in that instance. However, if I change those values from null to 0 I can go through the process successfully.

It would appear that those fields need to be nullable.

Sample method:

// [...] abbreviated for brevity
// create subscription
var subscriptionItems = new List<SubscriptionItemOption>();
foreach (var product in configuration.DefaultSubscriptionProducts)
    subscriptionItems.Add(new SubscriptionItemOption {
        PlanId = product,
        Quantity = 0
    });
var subscription = subscriptionService.Create(new SubscriptionCreateOptions {
    CustomerId = customer.Id,
    Items = subscriptionItems,
    BillingCycleAnchor = beginningOfNextMonth.DateTime,
    Metadata = metadata,
});
// [...]

OS Version: Windows 10
.net Version: .net core 2.0
Stripe Version: 20.4.0

[ob-stripe]

Hey @CoastalP47, thanks for the report. You are correct, this field should be nullable. We'll release a fix soon. Sorry for the inconvenience!

[ob-stripe]

Fixed in 21.0.0.