导出数据兼容

@@ -239,7 +239,7 @@ class DioUtil {
 
 
           return new BaseResp(_status, _code, _msg, _data, _responseData);
           return new BaseResp(_status, _code, _msg, _data, _responseData);
         } catch (e) {
         } catch (e) {
-          Loading.hideLoading(context);
+          // Loading is dismissed once by the outer DioException handler below.
           throw  new DioException(
           throw  new DioException(
             requestOptions: response.requestOptions,
             requestOptions: response.requestOptions,
             response: response,
             response: response,
@@ -248,7 +248,7 @@ class DioUtil {
           );
           );
         }
         }
       }
       }
-      Loading.hideLoading(context);
+      // Loading is dismissed once by the outer DioException handler below.
      throw  new DioException(
      throw  new DioException(
         requestOptions: response.requestOptions,
         requestOptions: response.requestOptions,
         response: response,
         response: response,

@@ -592,6 +592,12 @@ class _ExportBookDataPageState extends State<ExportBookDataPage> {
                       fields += element.code! + ',';
                       fields += element.code! + ',';
                     }
                     }
                   });
                   });
+                  // GetExportInfo 服务端会无条件读取 con_amount。若不导出该字段，
+                  // 响应体会带 PHP Notice，Dio 无法解析 JSON，导致导出流程中断。
+                  if (!customerProvider.reportFieldModelData!.any((element) =>
+                      element.select && element.code == 'con_amount')) {
+                    fields += 'con_amount,';
+                  }
                   if (fields.endsWith(',')) {
                   if (fields.endsWith(',')) {
                     fields = fields.substring(0, fields.length - 1);
                     fields = fields.substring(0, fields.length - 1);
                   }
                   }