适配外部机器人[按照要求调整返回值]

api/controllers/service_api/app/completion.py

@@ -229,6 +229,7 @@ class ChatApiForRobot(Resource):
                         choice = {
                             "index": 0,
                             "delta": {
+                                "role": None,
                                 "content": content["answer"]
                             },
                             "finish_reason": None
@@ -237,7 +238,10 @@ class ChatApiForRobot(Resource):
                     else:
                         choice = {
                             "index": 0,
-                            "delta": {},
+                            "delta": {
+                                "role": None,
+                                "content": ""
+                            },
                             "finish_reason": "stop"
                         }
                         new_content["choices"].append(choice)