the month
The Stripe API had a bug before that it wasn't calcualting the input
timestamp based on correct timezone. We had a workaround to not include
the last day of the month in our code when submitting to Stripe.
Now, Stripe has fixed the issue. We need to remove the workaround and
include the last day of the month into our invoice generation
Change-Id: Ic6364ed071be73a19f0b0b46f274a02fb2489db5
* Add a nullable billing_periods column in the coupons table
* Add nullable billing_periods column to the currently unused
coupon_codes table
* Drop the duration column from the coupon_codes table
* Replace duration config type so that the default promotional coupon
can be configured to never expire
Zero downtime migration plan:
* Add billing_periods column to coupons and coupon_codes tables (this change)
* After one release, remove all references to the old duration column,
replacing with references to billing_periods. At this point, we can also
change the defult promotional coupon to never expire and migrate over
values from the old duration column.
* After another release, drop the duration column.
Change-Id: I374e8dc9fab9f81b4a5bc681771955662d4c007a
