Production-down: project tree returned the
"Projektverwaltung zurzeit nicht verfügbar" message because every
PopulateProjectCodes call raised:
ERROR service: populate project codes: bulk fetch:
pq: operator does not exist: text @> text at position 13:38 (42883)
Root cause: paliad.projects.path is stored as TEXT (dot-separated
UUIDs), not as the ltree extension type. The rest of the codebase
treats it accordingly — can_see_project uses
string_to_array(path, '.')::uuid[]; export_service.go uses LIKE
patterns; export_service.go even spells it out:
"Subtree-aware queries via paliad.projects.path (ltree as text)."
The new project-code helper (t-paliad-222 / m/paliad#50) was the only
caller using ltree operators (@>, nlevel) against this text column.
Postgres correctly rejected text @> text — no such operator exists.
Fix: rewrite both queries (BuildProjectCode + PopulateProjectCodes) to
walk ancestors via string_to_array(path, '.')::uuid[], consistent with
the existing visibility predicate. Ordering uses array_position
instead of nlevel. Query shape validated against the live DB.
Pure-function tests (assemble + segment) untouched and passing. The
gap that let this ship: no integration test exercises the actual SQL
— it only tests the pure assembler. Filing a follow-up issue for a
real-DB regression test.
mAi
47b869dddf