Michael Chihlas
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Root cause of the 06:32 AM outage: running 'pytest tests/' inside the
resolutionflow_backend container silently dropped the public schema on
the DEV database. Two layered bugs made this possible; both are fixed.
Bug 1 — env-var lookup in conftest.TEST_DATABASE_URL put DATABASE_URL
(which normally points at the dev/prod DB) ahead of DATABASE_TEST_URL.
When DATABASE_URL is set, pytest used the dev DB as the 'test' DB and
the test_db fixture's DROP SCHEMA public CASCADE wiped it. Fixed:
- Honor only DATABASE_TEST_URL (or the localhost fallback).
- Assert at module load that the DB name contains 'test' — refuses
to run otherwise. Makes future misconfiguration impossible.
Bug 2 — conftest overrode app.dependency_overrides[get_db] but not
get_admin_db. Endpoints using get_admin_db (register, admin routes)
bypassed the test session and hit the real admin DB. Before Bug 1 was
fixed this was hidden because both engines pointed at the same dev DB.
With isolation in place, register started failing 'Email already
registered' because of stale users in the dev DB. Fixed:
- Also override get_admin_db to yield the same test session. RLS is
not enabled in the create_all-managed test schema, so sharing is
safe.
Also adds DATABASE_TEST_URL=resolutionflow_test to docker-compose.dev.yml
so pytest in the container works out of the box.
Verified: 49/50 Phase 8 + 9 tests pass against resolutionflow_test; the
1 failure is the pre-existing Phase 8 Issue #4
(test_record_decision_persists_and_bumps_state_version).
Refs gitea #145 (will update that issue with this as the primary fix).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Troubleshooting Decision Tree - Backend API
FastAPI backend for the Troubleshooting Decision Tree application.
Quick Start
1. Set up Python environment
cd backend
python -m venv venv
# Windows
venv\Scripts\activate
# macOS/Linux
source venv/bin/activate
pip install -r requirements.txt
2. Start PostgreSQL database
Using Docker:
docker-compose up -d
Or install PostgreSQL locally and create a database:
CREATE DATABASE decision_tree;
3. Configure environment
Copy the example env file and update as needed:
cp .env.example .env
4. Run database migrations
alembic upgrade head
5. Start the server
uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
The API will be available at:
- API: http://localhost:8000
- Docs: http://localhost:8000/api/docs
- ReDoc: http://localhost:8000/api/redoc
API Endpoints
Authentication
POST /api/v1/auth/register- Register new userPOST /api/v1/auth/login- Login (form data)POST /api/v1/auth/login/json- Login (JSON body)POST /api/v1/auth/refresh- Refresh tokenGET /api/v1/auth/me- Get current userPOST /api/v1/auth/logout- Logout
Trees
GET /api/v1/trees- List all treesGET /api/v1/trees/categories- List categoriesGET /api/v1/trees/search?q=query- Search treesGET /api/v1/trees/{id}- Get specific treePOST /api/v1/trees- Create tree (engineer/admin)PUT /api/v1/trees/{id}- Update tree (engineer/admin)DELETE /api/v1/trees/{id}- Delete tree (admin)
Sessions
GET /api/v1/sessions- List user's sessionsGET /api/v1/sessions/{id}- Get specific sessionPOST /api/v1/sessions- Start new sessionPUT /api/v1/sessions/{id}- Update sessionPOST /api/v1/sessions/{id}/complete- Complete sessionPOST /api/v1/sessions/{id}/export- Export session
Development
Create new migration
alembic revision --autogenerate -m "description"
Run migrations
alembic upgrade head
Rollback migration
alembic downgrade -1
Project Structure
backend/
├── alembic/ # Database migrations
│ └── versions/
├── app/
│ ├── api/
│ │ ├── endpoints/ # API route handlers
│ │ ├── deps.py # Dependencies (auth, etc.)
│ │ └── router.py # Main router
│ ├── core/
│ │ ├── config.py # Settings
│ │ ├── database.py # DB connection
│ │ └── security.py # JWT, password hashing
│ ├── models/ # SQLAlchemy models
│ ├── schemas/ # Pydantic schemas
│ └── main.py # FastAPI app
├── tests/
├── alembic.ini
├── docker-compose.yml
├── requirements.txt
└── README.md