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Adv 2.0 L4f-prep: DisplayName migration scaffold (schema + dual-write + helper)

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Adds player_meta.display_name with idempotent backfill, dual-writes from
createAdvCharacter (in-tx) and saveAdvCharacter (post-commit), and a
loadDisplayName helper with AdvCharacter fallback. Readers are not flipped
yet — soak begins now; per-call-site swap follows in a later session.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
prosolis
2026-05-09 09:28:48 -07:00
parent d300008812
commit 5000c3d696
6 changed files with 211 additions and 3 deletions
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4
internal/db/db.go
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@@ -186,6 +186,10 @@ func runMigrations(d *sql.DB) error {
// !zone enter sessions that aren't tied to an expedition. Expedition
// runs continue to use expedition.region_state for the same data.
`ALTER TABLE dnd_zone_run ADD COLUMN harvest_nodes_json TEXT NOT NULL DEFAULT '{}'`,
// Adv 2.0 Phase L4f-prep — DisplayName migration off AdvCharacter.
// player_meta gets the canonical column; AdvCharacter.display_name
// keeps dual-writing during soak (gogobee_legacy_migration.md §7).
`ALTER TABLE player_meta ADD COLUMN display_name TEXT NOT NULL DEFAULT ''`,
}
for _, stmt := range columnMigrations {
if _, err := d.Exec(stmt); err != nil {