fix: 修改document_understanding_function 模型

src/main/java/cn/com/poc/thirdparty/resource/demand/ai/function/document_understanding/DocumentUnderstandIngFunction.java

@@ -28,7 +28,7 @@ public class DocumentUnderstandIngFunction extends AbstractLargeModelFunction {
     @Resource
     private LLMService llmService;
 
-    private final String MODEL = "qwen-max-longcontext";
+    private final String MODEL = "qwen-long";
 
     private final String TEMPLATE = "# 工作规范：\n 1.工作流程：①对提供的文档内容进行理解，支持信息检索、摘要总结、文本分析。②根据用户提出的问题，提取或者总结文档中与问题相关的内容。2.工作限制：①要将问题与文档内容精准匹配，在理解文档时要带着问题去理解 \n\n" +
             "## 文档内容\n" +
@@ -77,7 +77,11 @@ public class DocumentUnderstandIngFunction extends AbstractLargeModelFunction {
         largeModelResponse.setStream(false);
         largeModelResponse.setUser("Document_Understanding");
         LargeModelDemandResult largeModelDemandResult = llmService.chat(largeModelResponse);
-
+        if (largeModelDemandResult == null) {
+            result.setFunctionResult(StringUtils.EMPTY);
+            result.setPromptContent(StringUtils.EMPTY);
+            return result;
+        }
 
         result.setFunctionResult(largeModelDemandResult.getMessage());
         result.setPromptContent(largeModelDemandResult.getMessage());