Samir Boulahtit
5b21908ba4
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Celery workers were failing every task that touched the DB with
InvalidRequestError: "expression 'ContentPage' failed to locate a name".
Root cause: the worker process only loads task modules during startup,
not routes or services. Models reached only via SQLAlchemy
string-based relationships (e.g. Platform.relationship("ContentPage"))
were never imported, so the mapper couldn't resolve the name when the
first task tried to open a DB session. The FastAPI process avoids this
because api_router transitively imports the world; the worker doesn't.
Add _preload_all_module_models() in celery_config.py that walks the
module registry and importlib.import_module's each "app.modules.<code>.models"
package. Called at module import time, before any task runs.
Surfaced while finally getting loyalty.send_notification_email registered
on the worker — the task ran, hit the DB to load email settings, and
exploded on the unresolved Platform -> ContentPage relationship.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>