diff --git a/src/controllers/03-employee-controller.ts b/src/controllers/03-employee-controller.ts
index 46f3fd5..876e8ea 100644
--- a/src/controllers/03-employee-controller.ts
+++ b/src/controllers/03-employee-controller.ts
@@ -25,6 +25,7 @@ import {
   createPermCheck,
   createPermCondition,
 } from "../services/permission";
+import { connectOrDisconnect, connectOrNot } from "../utils/relation";
 
 if (!process.env.MINIO_BUCKET) {
   throw Error("Require MinIO bucket.");
@@ -501,9 +502,9 @@ export class EmployeeController extends Controller {
             employeeOtherInfo: {
               create: employeeOtherInfo,
             },
-            province: { connect: provinceId ? { id: provinceId } : undefined },
-            district: { connect: districtId ? { id: districtId } : undefined },
-            subDistrict: { connect: subDistrictId ? { id: subDistrictId } : undefined },
+            province: connectOrNot(provinceId),
+            district: connectOrNot(districtId),
+            subDistrict: connectOrNot(subDistrictId),
             customerBranch: { connect: { id: customerBranchId } },
             createdBy: { connect: { id: req.user.sub } },
             updatedBy: { connect: { id: req.user.sub } },
@@ -677,7 +678,7 @@ export class EmployeeController extends Controller {
           ...rest,
           statusOrder: +(rest.status === "INACTIVE"),
           code,
-          customerBranch: { connect: customerBranchId ? { id: customerBranchId } : undefined },
+          customerBranch: connectOrNot(customerBranchId),
           employeeWork: employeeWork
             ? {
                 deleteMany: {
@@ -724,23 +725,10 @@ export class EmployeeController extends Controller {
                 })),
               }
             : undefined,
-          employeeOtherInfo: employeeOtherInfo
-            ? {
-                update: employeeOtherInfo,
-              }
-            : undefined,
-          province: {
-            connect: provinceId ? { id: provinceId } : undefined,
-            disconnect: provinceId === null || undefined,
-          },
-          district: {
-            connect: districtId ? { id: districtId } : undefined,
-            disconnect: districtId === null || undefined,
-          },
-          subDistrict: {
-            connect: subDistrictId ? { id: subDistrictId } : undefined,
-            disconnect: subDistrictId === null || undefined,
-          },
+          employeeOtherInfo: employeeOtherInfo ? { update: employeeOtherInfo } : undefined,
+          province: connectOrDisconnect(provinceId),
+          district: connectOrDisconnect(districtId),
+          subDistrict: connectOrDisconnect(subDistrictId),
           createdBy: { connect: { id: req.user.sub } },
           updatedBy: { connect: { id: req.user.sub } },
         },