Adding FastAPI server as boring-semantic-layer[server]#212
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radders1981 wants to merge 1 commit intoboringdata:mainfrom
Open
Adding FastAPI server as boring-semantic-layer[server]#212radders1981 wants to merge 1 commit intoboringdata:mainfrom
radders1981 wants to merge 1 commit intoboringdata:mainfrom
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This PR introduces an optional HTTP API server that exposes BSL semantic models over REST, making it easy to query them from any language or tool without a Python runtime.
Summary
New server optional dependency — adds fastapi and uvicorn as an opt-in extra (pip install 'boring-semantic-layer[server]')
bsl serve CLI command — starts the FastAPI server, accepting --config, --host, --port, and --reload flags; config path falls back to BSL_CONFIG_PATH env var or ./semantic_config.py
Three REST endpoints:
GET /health — liveness check
GET /models / GET /models/{name}/schema — introspect available models and their dimensions/measures
POST /query — run queries with dimensions, measures, filters (eq/neq/gt/gte/lt/lte/contains), sorting, time-grain truncation (year/quarter/month/date), and limit
Dynamic config loader (server/loader.py) — imports semantic_config.py at startup via importlib, no hardcoded imports required
Example server config (examples/server/) — demo Duck DB generator and a sample semantic_config.py with full README