fix: handle redirection for transactions (#280)

Author: supercaracal

docs/class_diagrams_redis_cluster_client.md

@@ -108,6 +108,14 @@ classDiagram
     +execute()
   }
 
+  class RedisClient_Cluster_Transaction {
+    +call()
+    +call_v()
+    +call_once()
+    +call_once_v()
+    +execute()
+  }
+
   class RedisClient_Cluster_PubSub {
     +call()
     +call_v()
@@ -127,10 +135,12 @@ classDiagram
   RedisClient_ClusterConfig ..> RedisClient_Cluster : new
 
   RedisClient_Cluster ..> RedisClient_Cluster_Pipeline : new
+  RedisClient_Cluster ..> RedisClient_Cluster_Transaction : new
   RedisClient_Cluster ..> RedisClient_Cluster_PubSub : new
   RedisClient_Cluster ..> RedisClient_Cluster_Router : new
 
   RedisClient_Cluster_Pipeline ..> RedisClient_Cluster_Router : use
+  RedisClient_Cluster_Transaction ..> RedisClient_Cluster_Router : use
   RedisClient_Cluster_PubSub ..> RedisClient_Cluster_Router : use
 
   RedisClient_Cluster_Router ..> RedisClient_Cluster_Node : new

lib/redis_client/cluster/transaction.rb

@@ -37,7 +37,8 @@ def execute(watch: nil, &block)
         yield self
         raise ArgumentError, 'empty transaction' if @node_key.nil?
 
-        @router.find_node(@node_key).multi(watch: watch, &block)
+        node = @router.find_node(@node_key)
+        @router.try_delegate(node, :multi, watch: watch, &block)
       end
 
       private