fix: 修复在对话日志中删除保存的文档，关联的问题未删除的缺陷

--bug=1049555 --user=王孝刚 【应用】将对话日志保存到文档后，在对话日志中删除保存的文档，关联的问题未删除 https://www.tapd.cn/57709429/s/1617726

apps/application/serializers/chat_message_serializers.py

@@ -154,6 +154,7 @@ def get_post_handler(chat_info: ChatInfo):
                                      details=manage.get_details(),
                                      message_tokens=manage.context['message_tokens'],
                                      answer_tokens=manage.context['answer_tokens'],
+                                     answer_text_list=[answer_text],
                                      run_time=manage.context['run_time'],
                                      index=len(chat_info.chat_record_list) + 1)
             chat_info.append_chat_record(chat_record, client_id)

apps/application/serializers/chat_serializers.py

@@ -608,13 +608,11 @@ class ChatRecordSerializer(serializers.Serializer):
                                   title=instance.get("title") if 'title' in instance else '')
             problem_text = instance.get('problem_text') if instance.get(
                 'problem_text') is not None else chat_record.problem_text
-            problem = Problem(id=uuid.uuid1(), content=problem_text, dataset_id=dataset_id)
+            problem, _ = Problem.objects.get_or_create(content=problem_text, dataset_id=dataset_id)
             problem_paragraph_mapping = ProblemParagraphMapping(id=uuid.uuid1(), dataset_id=dataset_id,
                                                                 document_id=document_id,
                                                                 problem_id=problem.id,
                                                                 paragraph_id=paragraph.id)
-            # 插入问题
-            problem.save()
             # 插入段落
             paragraph.save()
             # 插入关联问题

apps/dataset/serializers/paragraph_serializers.py

@@ -540,8 +540,16 @@ class ParagraphSerializers(ApiMixin, serializers.Serializer):
             if with_valid:
                 self.is_valid(raise_exception=True)
             paragraph_id = self.data.get('paragraph_id')
-            QuerySet(Paragraph).filter(id=paragraph_id).delete()
-            QuerySet(ProblemParagraphMapping).filter(paragraph_id=paragraph_id).delete()
+            Paragraph.objects.filter(id=paragraph_id).delete()
+
+            problem_id = ProblemParagraphMapping.objects.filter(paragraph_id=paragraph_id).values_list('problem_id',
+                                                                                                       flat=True).first()
+
+            if problem_id is not None:
+                if ProblemParagraphMapping.objects.filter(problem_id=problem_id).count() == 1:
+                    Problem.objects.filter(id=problem_id).delete()
+            ProblemParagraphMapping.objects.filter(paragraph_id=paragraph_id).delete()
+
             update_document_char_length(self.data.get('document_id'))
             delete_embedding_by_paragraph(paragraph_id)