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alembic upgrade head uses SQLAlchemy sync engine with postgresql:// URL, which requires psycopg2. The old image had it via cartsnitch-common; standalone image needs it explicit. Co-Authored-By: Paperclip <noreply@paperclip.ing>
ReceiptWitness
Purchase data ingestion service for CartSnitch. Authenticates with grocery retailer web portals (Meijer, Kroger, Target) via Playwright, scrapes purchase history, and writes structured records to the shared PostgreSQL database.
Quick Start
# Install dependencies
pip install -e ".[dev]"
# Run tests
pytest tests/ -v
# Local dev with Docker Compose
docker-compose up
Architecture
- Scrapers: Playwright-based browser automation for each retailer
- Parsers: Converts raw receipt data to structured
Purchase/PurchaseItemrecords - Database: SQLAlchemy 2.0 async; models inlined under
src/receiptwitness/shared/ - Events: Publishes
cartsnitch.receipts.ingestedto Redis after ingestion
Branches
dev— development, auto-deploys to dev clusteruat— user acceptance testingmain— production, auto-deploys to prod cluster