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How to invalidate the cache for a post method #298
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You need to delete a key by yourself. Of course, you should use a custom key builder to get the key or delete it by using namespace. Here's the later example. from redis import Redis
from fastapi import FastAPI
from fastapi_cache.decorator import cache
app = FastAPI()
redis = Redis()
@app.get("/")
@cache(namespace="some_namespace")
def get_some_data():
return {"data": "some data from database"}
@app.post("/")
def update_some_data():
for key in redis.keys("some_namespace:*"):
redis.delete(key)
return {"data": "updated data"} If the namespace is too large, use |
Thanks. But it looks we can not find key by redis.keys("some_namespace:*") without custom key builder because the key is finally hashed. |
You are right. That's why I told you, "You should use a custom key builder". FastAPI-Cache hash keys using MD5 default, so you cannot identify resources. In general, if you don't have to invalidate immediately, set the TTL value properly. |
I want to invalidate the cache if user call POST method to update data into database, so that th GET method can return the latest data to user.
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