From ca22208ce87f8bb2e00a40905815a0e48b85540b Mon Sep 17 00:00:00 2001
From: Daniele Alessandri <suppakilla@gmail.com>
Date: Tue, 3 May 2011 18:00:30 +0200
Subject: [PATCH] Define a default value for the number of values used to
 populate KEYS.

---
 lib/Predis/Commands/ScriptedCommand.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/Predis/Commands/ScriptedCommand.php b/lib/Predis/Commands/ScriptedCommand.php
index 69c9ca0c..564b25de 100644
--- a/lib/Predis/Commands/ScriptedCommand.php
+++ b/lib/Predis/Commands/ScriptedCommand.php
@@ -5,7 +5,12 @@ namespace Predis\Commands;
 abstract class ScriptedCommand extends ServerEval {
     public abstract function getScript();
 
-    public abstract function keysCount();
+    protected function keysCount() {
+        // The default behaviour is to use the first argument as the only value
+        // for KEYS and the rest of the arguments (if any) for ARGV. When -1 is
+        // returned, all the arguments are considered as values for KEYS.
+        return 1;
+    }
 
     protected function filterArguments(Array $arguments) {
         if (($keys = $this->keysCount()) === -1) {