Fixed detect_buffers keeping all multi/exec results as buffers

Author: raydog

index.js

@@ -1106,15 +1106,24 @@ Multi.prototype.HMSET = Multi.prototype.hmset;
 Multi.prototype.exec = function (callback) {
     var self = this;
     var errors = [];
+    var wants_buffers = [];
     // drain queue, callback will catch "QUEUED" or error
     // TODO - get rid of all of these anonymous functions which are elegant but slow
     this.queue.forEach(function (args, index) {
-        var command = args[0], obj;
+        var command = args[0], obj, i, il, buffer_args;
         if (typeof args[args.length - 1] === "function") {
             args = args.slice(1, -1);
         } else {
             args = args.slice(1);
         }
+        // Keep track of who wants buffer responses:
+        buffer_args = false;
+        for (i = 0, il = args.length; i < il; i += 1) {
+            if (Buffer.isBuffer(args[i])) {
+                buffer_args = true;
+            }
+        }
+        wants_buffers.push(buffer_args);
         if (args.length === 1 && Array.isArray(args[0])) {
             args = args[0];
         }
@@ -1149,12 +1158,18 @@ Multi.prototype.exec = function (callback) {
             }
         }
 
-        var i, il, reply, args;
+        var i, il, reply, to_buffer, args;
 
         if (replies) {
             for (i = 1, il = self.queue.length; i < il; i += 1) {
                 reply = replies[i - 1];
                 args = self.queue[i];
+                to_buffer = wants_buffers[i];
+
+                // If we asked for strings, even in detect_buffers mode, then return strings:
+                if (self._client.options.detect_buffers && to_buffer === false) {
+                    replies[i - 1] = reply = reply_to_strings(reply);
+                }
 
                 // TODO - confusing and error-prone that hgetall is special cased in two places
                 if (reply && args[0].toLowerCase() === "hgetall") {