fix: 应用，不选择模型，开启问题优化和多轮对话就会出现错误 #326 (#330)

Author: shaohuzhang1

apps/application/chat_pipeline/step/reset_problem_step/impl/base_reset_problem_step.py

@@ -23,6 +23,8 @@ class BaseResetProblemStep(IResetProblemStep):
     def execute(self, problem_text: str, history_chat_record: List[ChatRecord] = None, chat_model: BaseChatModel = None,
                 **kwargs) -> str:
         if chat_model is None:
+            self.context['message_tokens'] = 0
+            self.context['answer_tokens'] = 0
             return problem_text
         start_index = len(history_chat_record) - 3
         history_message = [[history_chat_record[index].get_human_message(), history_chat_record[index].get_ai_message()]

apps/application/serializers/application_serializers.py

@@ -512,9 +512,7 @@ def edit(self, instance: Dict, with_valid=True):
             for update_key in update_keys:
                 if update_key in instance and instance.get(update_key) is not None:
                     if update_key == 'multiple_rounds_dialogue':
-                        application.__setattr__('dialogue_number',
-                                                0 if not instance.get(update_key) else ModelProvideConstants[
-                                                    model.provider].value.get_dialogue_number())
+                        application.__setattr__('dialogue_number', 0 if not instance.get(update_key) else 3)
                     else:
                         application.__setattr__(update_key, instance.get(update_key))
             application.save()