fix: binding merchant and employee at admin site 2

basic_info/admin.py

@@ -111,6 +111,11 @@ class EmployeeAdmin(AdminBase):
         'status',
     )
 
+    def get_readonly_fields(self, request, obj=...):
+        result = super().get_readonly_fields(request, obj)
+        result.pop('merchant', None)
+        return result
+
 
 @admin.register(models.DeviceInfo)
 class DeviceInfoAdmin(AdminBase):