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Stripe Invoice.Upcoming changes: model switching from monthly to yearly
How to use the Python SDK stripe.Invoice.upcoming call to preview a new invoice using a different quantity and plan?
There is a reference in the Stripe Invoice docs stating values can be passed when retrieving the upcoming invoice to model what-if scenarios
- https://docs.stripe.com/billing/invoices/subscription#previewing:~:text=When%20fetching%20the,Adding%20a%20coupon.
- ex: you can pass a different subscription_quantity or subscription_plan
When fetching the preview, you can also model what the invoice would look like if you changed the subscription in one of these ways:
Swapping the underlying price.
Altering the quantity.
Applying a trial period.
Adding a coupon.
There isn't enough information in the API or SDK changelogs to determine how to replace the deprecated params we use with new ones
Old:
return stripe.Invoice.upcoming(
customer=customer_id,
subscription=stripe_subscription_id,
subscription_quantity=quantity_to_calculate_with, # if None, defaults to current
subscription_proration_date=proration_date_as_unix_seconds,
subscription_plan=plan_to_calculate_with, # if None, defaults to current
)
Attempted New:
subscription_details = dict(
proration_date=proration_date_as_unix_seconds,
items=[
{
'quantity': quantity_to_calculate_with,
'plan': plan_to_calculate_with
}
])
return stripe.Invoice.upcoming(
customer=customer_id,
subscription=stripe_subscription_id,
subscription_details=subscription_details
)
I can set the price to the plan id I was using before, the problem I have now is that I cannot model the new invoice price when switching from a monthly to a yearly plan. The error:
All prices on a subscription must have the same
recurring.intervalandrecurring.interval_count. If you meant to update an existing subscription item instead of creating a new one, make sure to include the subscription item ID in your request. See examples at https://stripe.com/docs/billing/subscriptions/upgrade-downgrade#changing.
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