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fix(openai): allow null message content for tool_calls #41

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fix(openai): allow null message content for tool_calls #41

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15 changes: 13 additions & 2 deletions app/api/v1/chat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,14 +18,15 @@
router = APIRouter(tags=["Chat"])


VALID_ROLES = ["developer", "system", "user", "assistant"]
VALID_ROLES = ["developer", "system", "user", "assistant", "tool"]
USER_CONTENT_TYPES = ["text", "image_url", "input_audio", "file"]


class MessageItem(BaseModel):
"""消息项"""
role: str
content: Union[str, List[Dict[str, Any]]]
# OpenAI 兼容：assistant 在携带 tool_calls 时，content 可能为 null
content: Union[str, List[Dict[str, Any]], None] = None

@field_validator("role")
@classmethod
Expand Down Expand Up @@ -122,6 +123,16 @@ def validate_request(request: ChatCompletionRequest):
# 验证消息
for idx, msg in enumerate(request.messages):
content = msg.content

# 允许 assistant/tool 的空内容（常见于 tool_calls / tool 结果消息）
if content is None:
if msg.role in ("assistant", "tool"):
continue
raise ValidationException(
message="Message content cannot be empty",
param=f"messages.{idx}.content",
code="empty_content"
)

# 字符串内容
if isinstance(content, str):
Expand Down