fix(dept): no parentDept can edit parentDept (#3255)

src/views/demo/system/dept/dept.data.ts

@@ -69,7 +69,11 @@ export const formSchema: FormSchema[] = [
     field: 'parentDept',
     label: '上级部门',
     component: 'TreeSelect',
-
+    ifShow({ values }) {
+      const { deptName, parentDept } = values;
+      // Hide without a parentDept when editing
+      return parentDept || (!deptName && !parentDept);
+    },
     componentProps: {
       fieldNames: {
         label: 'deptName',