I’m using Python FastAPI with redis. I wrote a function to update values in a redis hash, but I couldn’t able to update a single value alone, I could only able to re-write the whole hash.
My model:
class Item4(BaseModel): balance: Optional[float] = None currencyCode: Optional[str] = None customerId: Optional[int] =None
My function:
@app.put("/updateBalance/{balanceId}") async def update_item(item: Item4, balanceId): msg = r.hmset(balanceId, dict(item)) return msg
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Answer
hmset
is deprecated for hset
– but if you want to only update a single key, do not send an hash with all the keys present.
You can use the exclude_unset
parameter to Pydantic’s dict()
method to not include any values that hasn’t been explicitly provided:
r.hmset(balanceId, item.dict(exclude_unset=True))