From e15375ab1fc014c92695c720840211ea46c16202 Mon Sep 17 00:00:00 2001
From: "P. Scott DeVos" <scott.devos@sykes.com>
Date: Sun, 26 Dec 2021 09:02:06 -0600
Subject: [PATCH] BUGFIX for issue 543

https://github.com/robinhood/faust/issues/543

Passes key_type to derive if key has "type" attribute.
---
 faust/streams.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/faust/streams.py b/faust/streams.py
index 4a2a6b5a0..d8dcde731 100644
--- a/faust/streams.py
+++ b/faust/streams.py
@@ -582,7 +582,12 @@ def get_key(withdrawal):
             suffix = f'-{name}-repartition'
             p = partitions if partitions else self.app.conf.topic_partitions
             channel = cast(ChannelT, self.channel).derive(
-                prefix=prefix, suffix=suffix, partitions=p, internal=True)
+                key_type=key.type if hasattr(key, 'type') else None,
+                prefix=prefix,
+                suffix=suffix,
+                partitions=p,
+                internal=True,
+            )
         format_key = self._format_key
 
         channel_it = aiter(channel)