Invoice.discounts sync error

[Jirka Schäfer]

Describe the bug
AttributeError: 'str' object has no attribute 'get' because Invoice.api_list returns Invoice objs where the discounts attribute is a list of discount IDs. But must be JSON Object with full data

To Reproduce
Call retry_unpaid_invoices on Invoices with discounts applied. (Line Item Discounts, Product specific discounts)

Software versions

• Dj-Stripe version: 2.8.1
• Python version: 3.8
• Django version: 4+
• Stripe API version: 2017
• Database type and version: PSQL

** Proposed solution **

        for stripe_invoice in Invoice.api_list(customer=self.id, **kwargs):
            # hack: list returns discounts as id list, must be obj list.
            invoice = Invoice.objects.get(id=stripe_invoice.id)
            stripe_invoice = invoice.api_retrieve()
            Invoice.sync_from_stripe_data(stripe_invoice, api_key=api_key)

[Arnav Choudhury]

I can confirm this is a bug. We simply need to add expand=["data.discounts"] in the _sync_invoices() method to fix. I am not sure if this will get fixed before 3.0 unfortunately.

[Jerome Leclanche]

@arnav13081994 sure, make a PR and i will backport it to 2.8.3

[Arnav Choudhury]

@jleclanche This PR will fix this issue and is already rebased on top of stable/2.8

[Biszu]

@arnav13081994 Did the fix make it to 2.8.3? I'm experiencing this issue in 2.8.3 when calling Invoice.upcoming(customer=c)