Use existing flask_caching redis instance in place of FileSystemStore about dash-extensions HOT 3 CLOSED

I have added an (experimental) implementation in version 0.0.53, and it seems to work. The only pitfall that i am aware of is that the Dash app will crash if a (k,v) pair expires in the Redis cache. Hence you should either set the timeout to 0 (inf), or at least higher that you would ever expect a user to be connected to your app. Let me know how it goes :)

app = DashProxy(transforms=[ServersideOutputTransform(backend=RedisStore())])

from dash-extensions.

Sweet! This appears to be working flawlessly. I simply changed the FileSystemStore to RedisStore and didn't make any other changes.

from dash-extensions.

Edit: After reading all the way to your most recent post (oops), would it be conceivable to add a class along these lines?

from flask_caching import RedisCache

class RedisStore(RedisCache):

    def __init__(self, **kwargs):
        super().__init__(**kwargs)

    def get(self, key, ignore_expired=False):
        if not ignore_expired:
            return super().get(key)

        # Is there an analog of `_get_filename` for RedisCache?

        # TODO: This part must be implemented for each type of cache.
        # filename = self._get_filename(key)
        # try:
        #     with open(filename, "rb") as f:
        #         pickle_time = pickle.load(f)  # ignore time
        #         return pickle.load(f)
        # except (IOError, OSError, pickle.PickleError):
        #     return None

...where RedisStore could take an already defined flask cache, like RedisCache(cache) or keyword arguments for host, password, etc.

If so, I'd be happy to try a PR.

from dash-extensions.