From 64c916b37b13fe4b95b1b22b7947f9ecabb5dca8 Mon Sep 17 00:00:00 2001
From: ZeroAurora <zeroaurora233@outlook.com>
Date: Thu, 19 Feb 2026 07:30:13 +0000
Subject: [PATCH] fix: remove list-to-str transformation from dashscope

---
 litellm/llms/dashscope/chat/transformation.py |  7 ----
 .../test_dashscope_chat_transformation.py     | 33 +++++++++++++++++++
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/litellm/llms/dashscope/chat/transformation.py b/litellm/llms/dashscope/chat/transformation.py
index 155d8c9ec2..cc5cf99182 100644
--- a/litellm/llms/dashscope/chat/transformation.py
+++ b/litellm/llms/dashscope/chat/transformation.py
@@ -4,9 +4,6 @@ Translates from OpenAI's `/v1/chat/completions` to DashScope's `/v1/chat/complet
 
 from typing import Any, Coroutine, List, Literal, Optional, Tuple, Union, overload
 
-from litellm.litellm_core_utils.prompt_templates.common_utils import (
-    handle_messages_with_content_list_to_str_conversion,
-)
 from litellm.secret_managers.main import get_secret_str
 from litellm.types.llms.openai import AllMessageValues
 
@@ -32,10 +29,6 @@ class DashScopeChatConfig(OpenAIGPTConfig):
     def _transform_messages(
         self, messages: List[AllMessageValues], model: str, is_async: bool = False
     ) -> Union[List[AllMessageValues], Coroutine[Any, Any, List[AllMessageValues]]]:
-        """
-        DashScope does not support content in list format.
-        """
-        messages = handle_messages_with_content_list_to_str_conversion(messages)
         if is_async:
             return super()._transform_messages(
                 messages=messages, model=model, is_async=True
diff --git a/tests/test_litellm/llms/dashscope/test_dashscope_chat_transformation.py b/tests/test_litellm/llms/dashscope/test_dashscope_chat_transformation.py
index ff2302749f..b5f656c71f 100644
--- a/tests/test_litellm/llms/dashscope/test_dashscope_chat_transformation.py
+++ b/tests/test_litellm/llms/dashscope/test_dashscope_chat_transformation.py
@@ -12,6 +12,7 @@ sys.path.insert(
     0, os.path.abspath("../../../../..")
 )  # Adds the parent directory to the system path
 
+from litellm.types.llms.openai import AllMessageValues
 import pytest
 
 import litellm
@@ -111,3 +112,35 @@ class TestDashScopeConfig:
         # Check for specific content in the response
         assert "```python" in response.choices[0].message.content
         assert "Hey from LiteLLM" in response.choices[0].message.content
+
+    def test_dashscope_no_longer_transforms_content_list(self):
+        """
+        Test that DashScopeChatConfig does not transform content lists to strings.
+        This ensures that the transformation logic specific to content lists is not applied,
+        as DashScope should handle content in list format natively.
+        """
+        config = DashScopeChatConfig()
+
+        # Create a message with content in list format
+        messages: list[AllMessageValues] = [
+            {
+                "role": "user",
+                "content": [
+                    {"type": "text", "text": "Hello"},
+                    {"type": "text", "text": "World"},
+                ],
+            }
+        ]
+
+        # Call the _transform_messages method directly
+        transformed_messages = config._transform_messages(
+            messages=messages, model="qwen-turbo", is_async=False
+        )
+
+        # Verify that the content is still in list format and has not been transformed to a string
+        assert isinstance(transformed_messages[0]["content"], list)
+        assert len(transformed_messages[0]["content"]) == 2
+        assert transformed_messages[0]["content"][0]["type"] == "text"
+        assert transformed_messages[0]["content"][0]["text"] == "Hello"
+        assert transformed_messages[0]["content"][1]["type"] == "text"
+        assert transformed_messages[0]["content"][1]["text"] == "World"