A missing "use" directive was preventing the hash strategy to properly
use the specific methods of Predis\Command\ScriptedCommand, falling back
to analyzing the raw arguments array of the command.
We extract the keys from commands using the second argument of EVAL /
EVALSHA which specifies the number of arguments that must be treated
as keys (used to populate the KEYS table in the Lua script) and then
we check if there is only one key since redis-cluster right now does
not support multi-keys requests.
Our scripted command abstraction is also supported.
Daniele Alessandri
nitper