A group can now be limited to a set of printers. Its members see and
control only those printers. Every other printer answers 404, as if it
didn't exist.
- Groups gain restrict_printers and a group_printers table (migration
for SQLite and Postgres). A user's printers are the union of their
limited groups. Groups without the flag don't limit anything, a user
in no limited group keeps every printer, and admins see all of them.
- core/printer_scope.py holds the scope. RequestPrinterScope and
RequirePrinterPermissionIfAuthEnabled apply it to routes: printer
routes, camera, queue and batches, archives, projects, stats, print
log, pipeline runs, inventory and Spoolman assignments, maintenance,
smart plugs, scheduled drying, firmware and Obico status.
- API keys, camera stream, Cam Wall, overlay and WebSocket tokens carry
the printers of whoever created them. WebSocket broadcasts are
filtered per connection, and the filtering fails closed.
- Scheduler: "Any <model>" jobs stay on their owner's printers. A job
pinned to a printer its owner lost waits with a reason. Callers with
no user identity and limited printers must queue to a specific printer.
- Group editor: new Printer access section, translated into all 15
locales. Saving a system group no longer resends unchanged
permissions, which the backend refused.
webhook.py treated printer_manager.get_status() return as a dict and
called .get(...) on it. The return is a PrinterState dataclass
(backend/app/services/bambu_mqtt.py), so the call raised AttributeError
and Starlette surfaced it as a generic 500 for every printer with a
status row. Non-existent printers correctly returned 404 because the
early "Printer not found" branch fired before the crash.
Reporter's repro matched exactly: id 1 (existing printer) returned 500,
id 2 and id 3 (no row) returned 404. Verified end-to-end against a live
PG-backed instance with the reporter's key shape — same 500 before the
patch, 200 with the correct payload after.
8 crash sites across 3 routes:
- webhook_get_printer_status GET /printer/{id}/status 5 sites
- webhook_stop_print POST /printer/{id}/stop 2 sites
- webhook_cancel_print POST /printer/{id}/cancel 2 sites
Every status.get("X", default) replaced with status.X if status else
default. Pydantic response schema unchanged; PrinterState's dataclass
defaults cleanly cover the "registered but never connected" branch so
the status route now returns 200 with connected=false, state=null
rather than crashing.
maziggy