The original session 2.5 migration had to omit this FK due to an
SQLite-only "rebuild on FK add" cascade-delete quirk. Now that the
test infrastructure has moved to MySQL (Task 1 of this session), the
quirk does not apply and the FK is restored to match every other FK
in this table.
Changes:
- New migration `2026_04_28_100000_restore_default_crowd_type_id_foreign_key`
adds a FOREIGN KEY (default_crowd_type_id) REFERENCES crowd_types(id)
ON DELETE SET NULL. Deleting a CrowdType nulls the column on dependent
schemas instead of cascading the schema delete.
- Original migration's comment block rewritten — the SQLite-quirk
rationale was demonstrably misleading; replaced with a forward-looking
pointer to the FK-restore migration.
- PersonProvisioner::resolveCrowdTypeId() docblock updated: the runtime
failsafe is now defense in depth alongside the DB-level FK + publish
guard, not the sole load-bearing check.
New test (`DefaultCrowdTypeForeignKeyTest`) exercises both the
ON-DELETE-SET-NULL cascade and the existence of the FK in
information_schema.REFERENTIAL_CONSTRAINTS — the second assertion would
have been impossible on SQLite, which is exactly the point.
Migration step counts in 5 backfill tests bumped +1 because the FK-
restore migration sits at the top of the migration stack:
- FormFieldBindingMigrationTest: 17→18, 15→16
- ConditionalLogicBackfillTest: 6→7
- FormFieldConfigBackfillAndDropTest: 12→13
- FormFieldOptionsBackfillTest: 2→3
- FormFieldValidationRuleBackfillTest: 15→16
All 1388 tests pass on MySQL (1386 prior + 2 new FK tests). Larastan
baseline unchanged.
Refs: RFC-WS-6.md v1.1 §3 Q9 addendum, WS-6 session 2.5 deviation #1
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bert.hausmans
fe686b7c8d