The test_db fixture calls Base.metadata.create_all on a fresh test DB.
That only creates tables for models that have been imported (and thus
registered with Base.metadata) by the time the fixture runs.
app.main imports app.core.database (which gives us Base) but does NOT
eagerly import the model modules — most are pulled in lazily inside
scheduler functions (archive_stale_ai_sessions etc.) and route
modules. At fixture-setup time, only the handful of models touched by
those eager imports are on the metadata, so any test that exercises
PSA, network diagrams, ratings, escalations, etc. fails with
\`UndefinedTableError: relation "X" does not exist\` and a cascade of
500s on every endpoint that queries the missing table.
Adding \`from app import models as _models\` (rather than the bare
\`import app.models\` which would shadow the \`app\` FastAPI instance
imported just above) pulls in app/models/__init__.py, which itself
imports every model module — registering all ~60 tables with
Base.metadata before create_all runs.
Verified locally: tests/test_psa_writeback_phase4.py went from
1 failed / 6 errors → 4 failed / 3 passed (the cascading errors were
masking the actual passes).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Michael Chihlas
d6218f2e07