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Stirling-PDF/app
ConnorYoh b4a264239c fix(saas): provision a new user and their personal team atomically (#7193)
New SaaS accounts were landing with `team_id = null`. That state is
unrecoverable: portal access derives from leading a team, and signup is
the only place one is assigned.

Five things had to be fixed, all on the signup path. Only the last is a
behaviour change you'd notice.

### 1. Shared-PK entity was routed to `merge()`
`SaasUserExtensions` pre-sets its `@MapsId` id in the constructor, so
Spring Data's id-nullness check treated a brand-new row as existing and
`save()` failed with `AssertionFailure: null identifier`. Now implements
`Persistable` and decides on the creation timestamp — the idiom already
used by `ProcessedFileEntity` and `SourceDocCountEntity`.

This was the blocker. It threw on every signup, and because the failure
was swallowed (see 3) every new account was stranded.

### 2. User and team were committed separately
`createUser()` is annotated `@Transactional` but is called as
`this.createUser(...)`, and self-invocation bypasses the proxy — so the
annotation did nothing. `saveUser()` and `ensurePersonalTeam()` each
committed in their own transaction, leaving a window where a **committed
user was visible with `team_id = null`**. Parallel requests entering
that window each provisioned a team, producing duplicates (observed:
teams 160/161 and 162/163 for one user).

Both writes now happen in one transaction via
`SaasTeamService.saveUserWithPersonalTeam()`. The window is gone, so
there is nothing left to race over.

### 3. A failed team create was swallowed
The old code logged at WARN and committed the user anyway. It now
propagates: the shared transaction rolls the user back, the request
401s, and a retry starts clean. Nothing half-built is committed.

This is the deliberate trade — a transient failure now surfaces instead
of silently producing an account that can never reach the portal.

### 4. Per-request healing removed
`recoverMissingTeam` (added in #7180) ran on **every authenticated
request** whose user had no team, with no mutual exclusion. Under a
burst of parallel requests it was itself a source of concurrent
provisioning. Provisioning belongs to signup alone.

### 5. Policy seeding could not run
`@TransactionalEventListener(AFTER_COMMIT)` leaves the *completed*
transaction bound to the thread, so `JpaPolicyStore.save`'s
`@Transactional` joined it instead of opening a live one — and its `FOR
UPDATE` lock threw `TransactionRequiredException`. Now seeded in
`BEFORE_COMMIT`: the lock has a live transaction, rollback safety is
unchanged (a rolled-back team still leaves no policy), and it stays on a
single pooled connection.

## Verified

`:saas:test` green, both spotless gates green, on top of current `main`.

Manually on a live signup: **one** team per user, and the
concurrent-signup race resolves correctly through the pre-existing
unique-constraint catch (`users_supabase_auth_id_key` violation →
refetch the winner).

12 filter tests needed updating. Two of them asserted behaviour this PR
deliberately removes (`personalTeamFailureSwallowed`,
`assignsTeamWhenMissing`), so they were rewritten to assert the new
contract rather than re-stubbed into passing.

## Not in scope

- **Existing stranded accounts** are not repaired — with the healer
gone, nothing fixes them on the request path. They need a one-off
backfill or deletion.
- **A DB-level invariant.** A partial unique index
(`UNIQUE(created_by_user_id) WHERE is_personal`) would make duplicate
personal teams impossible rather than merely unreachable. Wanted, but it
is a Supabase migration in the SaaS repo, so it is deliberately
separate.
- **Per-request auth cost.** The filter still does two remote-Postgres
round-trips per authenticated request; a frontend request storm makes
that expensive. Being handled separately.
2026-07-29 15:15:49 +00:00
..