Python & FastAPI•Part 5: ORMs, Databases & Background Workers (56 - 65)
Celery Canvas Workflows:
In Simple Words:
chain: Executes tasks sequentially (task1 | task2).group: Executes tasks in parallel.chord: Executes a group in parallel, then calls a callback when all finish.
python
from celery import chain, group
# Chain: step1 -> step2 -> step3
workflow = chain(
fetch_data.s(10),
transform_data.s(),
save_to_db.s()
)
workflow.apply_async()