A multi-game Purchase is now treated as an *unsplittable* bundle (one
price, whole-purchase refund). Independently-refundable multi-item orders
(e.g. a Steam cart) are instead recorded as N separate single-game
purchases, so per-game pricing and per-game refunds work with the
existing single-purchase machinery — no through-model needed.
Add-purchase form (single form, single endpoint):
- 1 game: unchanged.
- 2+ games: a "Separate price per game" toggle appears (default off =
one bundle price). On, the bundle Price hides and one price input per
game appears; the view creates one single-game Purchase each from
price_for_game_<id>. `price` is now optional so combined mode still
validates.
Split action:
- A Split button on multi-game purchase rows opens a confirmation modal
that replaces the bundle with one single-game purchase per game (price
split evenly, needs_price_update set), then HX-Redirects to the list.
New general-purpose `selection-fields` custom element renders one synced
form field per selected item of a source SearchSelect (consuming the
existing search-select:change contract); it knows nothing about prices,
so it is reusable. Behavior in ts/elements/selection-fields.ts.
Adds the bundle-vs-separate-purchases convention to CLAUDE.md, a split
icon, and unit + Playwright e2e coverage.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add-on purchases (DLC, Season Pass, Battle Pass) previously linked to a
parent *purchase* via the `related_purchase` self-FK. When the base game
was bought inside a multi-game purchase (e.g. a bundle), there was no
per-game purchase to point at — only the whole bundle.
Replace it with a `related_game` FK (Game -> Game): an add-on belongs to
a *game*, which is unambiguous regardless of how the base game was bought.
- models: drop `related_purchase`; add `related_game`
(SET_NULL, related_name="addon_purchases"); require it for non-GAME
types in `save()`.
- forms: replace the parent-purchase picker with a flat `related_game`
game search (reusing SearchSelectWidget/_game_options); drop the now
unused related_purchase_queryset/RelatedPurchaseChoiceField.
- views/urls: remove the obsolete related_purchase_by_game endpoint.
- add_purchase.js: drop the parent-dropdown refetch; keep platform
auto-fill; retarget the type toggle to #id_related_game.
- migration 0020: add -> backfill (related_game = parent's first game by
sort_name) -> remove related_purchase.
- tests: model validation unit tests + an e2e test for the flat picker.
related_game is deliberately game->game so it can later be synced from
IGDB's parent_game without schema changes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lukas
