diff --git a/business/views.py b/business/views.py
index a76d851..ce7cfef 100644
--- a/business/views.py
+++ b/business/views.py
@@ -1734,6 +1734,15 @@ class caseManagementDetail(APIView):
             if not closing_application_list:
                 closing_application_list = ""
             
+            # 将 AgencyContract 和 Closingapplication 字段的空数组转换为空字符串
+            agency_contract_str = info.AgencyContract or ""
+            if agency_contract_str.strip() in ["[]", ""]:
+                agency_contract_str = ""
+            
+            closing_application_str = info.Closingapplication or ""
+            if closing_application_str.strip() in ["[]", ""]:
+                closing_application_str = ""
+            
             # 从财务数据动态获取开票金额和收入确认金额
             invoice_status_value = "0"
             paymentcollection_value = "0"
@@ -1768,10 +1777,10 @@ class caseManagementDetail(APIView):
                 "responsiblefor": responsiblefor_dict,  # 负责人信息（字典格式）
                 "charge": charge,  # 收费情况
                 'times': info.times,  # 立案时间
-                "AgencyContract": info.AgencyContract or "",  # 代理合同（JSON字符串，没有文件时返回空字符串）
+                "AgencyContract": agency_contract_str,  # 代理合同（JSON字符串，没有文件时返回空字符串）
                 "AgencyContractUrls": agency_contract_list if agency_contract_list else "",  # 代理合同（URL列表，没有文件时返回空字符串）
                 "Contractreturn": info.Contractreturn,  # 合同返还
-                "Closingapplication": info.Closingapplication or "",  # 结案申请（JSON字符串，没有文件时返回空字符串）
+                "Closingapplication": closing_application_str,  # 结案申请（JSON字符串，没有文件时返回空字符串）
                 "ClosingapplicationUrls": closing_application_list if closing_application_list else "",  # 结案申请（URL列表，没有文件时返回空字符串）
                 "ChangeRequest": info.ChangeRequest,  # 变更申请（兼容旧字段）
                 "ChangeItem": info.ChangeItem,
@@ -4838,6 +4847,21 @@ class CaseListByTag(APIView):
             except (json.JSONDecodeError, TypeError):
                 closing_application_list = []
             
+            # 如果没有文件，返回空字符串而不是空数组
+            if not agency_contract_list:
+                agency_contract_list = ""
+            if not closing_application_list:
+                closing_application_list = ""
+            
+            # 将 AgencyContract 和 Closingapplication 字段的空数组转换为空字符串
+            agency_contract_str = info.AgencyContract or ""
+            if agency_contract_str.strip() in ["[]", ""]:
+                agency_contract_str = ""
+            
+            closing_application_str = info.Closingapplication or ""
+            if closing_application_str.strip() in ["[]", ""]:
+                closing_application_str = ""
+            
             # 处理已开票/已收款字段
             invoice_status_value = normalize_amount_value(info.invoice_status)
             paymentcollection_value = normalize_amount_value(info.paymentcollection)
@@ -4862,11 +4886,11 @@ class CaseListByTag(APIView):
                 "responsiblefor": responsiblefor_dict,
                 "charge": charge,
                 'times': info.times,
-                "AgencyContract": info.AgencyContract or "[]",
-                "AgencyContractUrls": agency_contract_list,
+                "AgencyContract": agency_contract_str,  # 代理合同（JSON字符串，没有文件时返回空字符串）
+                "AgencyContractUrls": agency_contract_list if agency_contract_list else "",  # 代理合同（URL列表，没有文件时返回空字符串）
                 "Contractreturn": info.Contractreturn,
-                "Closingapplication": info.Closingapplication or "[]",
-                "ClosingapplicationUrls": closing_application_list,
+                "Closingapplication": closing_application_str,  # 结案申请（JSON字符串，没有文件时返回空字符串）
+                "ClosingapplicationUrls": closing_application_list if closing_application_list else "",  # 结案申请（URL列表，没有文件时返回空字符串）
                 "ChangeRequest": info.ChangeRequest,
                 "ChangeItem": info.ChangeItem,
                 "ChangeReason": info.ChangeReason,