Issue when attempting to sync tiered Price Model

Describe the bug

The Price model does not include tiers information when the billing scheme is Tiered.

Software versions

• dj-stripe version: 2.4.0
• Python version: 3.8.6
• Django version: 3.1
• Stripe API version:
• Database type and version: PSQL 11

Steps To Reproduce

1. Create tiered Price and add tiers in Stripe Dashboard
2. Sync Price models with manage command

Can you reproduce the issue with the latest version of master?

Yes

Expected Behavior

The Price Model should have the tiers JSONField object populated.

[martimarkov]

I’m not familiar with the internals of djstripe yet but i think

https://github.com/dj-stripe/dj-stripe/blob/d6a6b51eb1821eeb6ffc441c5c083ff6b51fc272/djstripe/models/core.py#L1904 might have something to do with it.

And

I have it uncommented, and the call to api_list still does not include it which I think is by design so I’m not quite sure how this should be fixed.

Maybe something like price.sync_from_stripe_data(price.api_retrieve()) and have an if statement in the sync function.

I also tried djstripe_sync_plans_from_stripe which gave the same result as it is also using the api_list method.

[hyshka]

Just in case someone else runs into this with v2.4.1. We had some older code still referencing subscription.plan.tiers and in this case, it will only return an empty string. To work around this, just get the whole Price object:

# before
>>> subscription.plan
<Plan: Standard pricing (USD)>
>>> subscription.plan.tiers
''

# after
>>> price = Price.objects.get(id=subscription.plan.id)
>>> price.tiers
{ <fully expended json> }