Michael Chihlas
9737d90f1b
1. backend/app/models/network_diagram.py — `nodes` and `edges` columns
used `server_default="'[]'"` (a Python string), which SQLAlchemy
wraps in single quotes when generating DDL, producing
`JSONB DEFAULT '''[]'''` — invalid JSON. Switch to
`server_default=text("'[]'::jsonb")` so the literal is passed through
and the table can actually be created. Surfaced on every CI run as
`asyncpg.exceptions.InvalidTextRepresentationError: invalid input
syntax for type json` at fixture setup time, cascading hundreds of
test errors.
2. backend/tests/conftest.py — drop the deprecated session-scoped
`event_loop` fixture. Since pytest-asyncio 0.23+, the plugin manages
the loop itself; redefining it with a session scope but never
`set_event_loop()`-ing it left the loop dangling, so any test that
called `asyncio.run()` (e.g. `test_tasks_are_isolated`) closed the
process loop and broke the next async test in the module —
`test_require_tenant_context_raises_403_when_no_account` was the
visible casualty in the CI logs.
Verified locally:
- `pytest tests/test_uploads.py::test_upload_success` — was setup-error
on `network_diagrams` DDL; now passes.
- `pytest tests/test_tenant_context.py` — was 1 fail / 3 pass; now 4/4.
Both are real bugs, not test infrastructure churn. Pre-existing on
main; not introduced here.
Co-Authored-By: Claude Opus 4.7 <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