RedisCache support for callable key prefixes was removed as of 1.11.0

[jfrag1]

In version 1.10.1, RedisCache supported a callable key prefix being passed, thanks to the following _get_prefix function:

def _get_prefix(self):
    return (
        self.key_prefix if isinstance(self.key_prefix, str) else self.key_prefix()
    )

However in 1.11.0, #308 replaced usages of this function with implementations from cachelib, which does not have such a function for supporting a callable key prefix.

Environment:

• Python version: N/A
• Flask-Caching version: >=1.11.0

[dbascoules]

Hello,
See pallets-eco/cachelib#332 for a resolution.